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94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) #3104459
12/22/22 10:21 AM
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Been looking at trucks recently and thinking maybe about an older Ram. I've had my run with a 4.7L for 15 years and somewhat know them. I like the styling of the 94-01 Ram trucks slightly better over the later trucks. I would using this truck to mainly make trips to town with highway driving mixed in and haul a little lumber. I've found some lower mileage (105,000 and under) trucks a 98 and 00 for example. I've found also a couple of older 94-95 trucks but with more miles. My understanding is that maybe the 46RH might be slightly better than the 46RE? I've read 1995 was the last year for the 46RH. I'm just wondering if the 46RH vs the 46RE would be preferred. I believe that being 1994-1995 puts me in OBD 1 territory as well.

I'm looking for some advice. I've also found some lower mileage Dakotas as well but, mainly in the 1997-2004 generation. Any help or information would be greatly appreciated. Thank you.

Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: OrangeProwler] #3104731
12/22/22 10:37 PM
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I can offer some info regarding a 90-96 Dakota, I've had a few.

Up front, I'm not so sure there was much difference between the RH and the RE transmissions, as far as durability is concerned. It really comes down to how well earlier owners took care of the truck, or even more importantly, how badly they may have abused the truck. The answer is not a cover all deal at all (this model year truck is better then that model year is BS).

For what you are describing as the way your going to use your future truck, previous ownership is going to have much more effect on the transmission service life then weather the OD is hydraulic shifted or electronically shifted.

The next biggest deal concerning the transmission life, is if the antiflow back valve in the cooler line is, or has been cleaned or removed. That little ball moving back and forth in the line has a real problem moving if the fluid gets a bit dirty. When it no longer moves freely, it will kill a trans pretty quickly because it can shut off the fluid flow through the cooler. If the valve has been removed from the cooler line, then the fluid can drain back into the trans pan. If the last owner started the truck, put it in gear, and expected to move instantly, the fluid may not have refilled the empty lines and will starve the trans of fluid flow for a few seconds, causing premature wear. The Mopar auto trans does not pump fluid while in the park position (I believe the newer ones have solved that issue, but I don't remember when that started).

As a matter of practice, I always put my Mopar automatic transmissions in neutral for a count of 30 before I put in either drive or reverse, to give the trans time to fill up anything that might drained the fluid back into the pan. That sure has helped extend the transmission service life.

My 95 and my 96 Dakotas were both OBD2, but the 93 was OBD1, I'm not sure when the change over took place, but I believe the full size trucks were OBD 2 before the Dakotas were.

When you buy a used truck, buy the truck as an individual truck (this truck compared to that truck), not as a generic age group (there are good and bad in every age group).

Also, be sure you inspect the frame for rust! Take a hammer with you and smack the frame in any place that might look questionable. If it dents easily, or the hammer blows through, the frame needs to be patched. if it has holes that are not suppose to be there, they need to be patched. If it has any cracks, they need to be welded. Get a price on any frame repair before you buy the truck, some simply CAN NOT be repaired!

One more thing, very low mileage trucks mean they have spent a lot of time sitting (2,000 or 3,000 miles a year is a yellow flag). For a truck to sit for long periods of time is usually not good for them, if you start using them a lot, a lot of stuff might need to be repaired. Often low mileage trucks see a lot less maintenance because they don't see many miles very fast and most people base maintenance on mileage only.

Last edited by poorboy; 12/22/22 10:46 PM.
Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: poorboy] #3104903
12/23/22 02:10 PM
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The Mopar auto trans does not pump fluid while in the park position

sonnax makes a lot of things to improve the 46re including this.

Quote
I like the styling of the 94-01 Ram trucks slightly better over the later trucks.

Couldn't agree more that's why i have two of them! I would look for a 96 and up, Nothing wrong with the earlier ones but they are OBD1 and 46rh. I had a 90 that had the A500(same as the 46rh) and liked the shifting of the RE better. If you go to check out a few of them look for rust at the bottom of the doors(common problem). Also look at the frame and anything also that might be compromised with rust. The rear brake line next to the gas tank rust out and burst so check out the brake lines. You won't sorry i had my 96 for 20 years as a daily driver. Here are mine both 96's Indy ram and the black one is my DD 2500 4X4.

[img]https://hosting.photobucket.com/alb...?width=320&height=320&fit=bounds[/img]
[img]https://hosting.photobucket.com/alb...?width=320&height=320&fit=bounds[/img]

Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: Moparite] #3104927
12/23/22 03:36 PM
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Originally Posted by Moparite
Quote
The Mopar auto trans does not pump fluid while in the park position

sonnax makes a lot of things to improve the 46re including this.

Quote
I like the styling of the 94-01 Ram trucks slightly better over the later trucks.

Couldn't agree more that's why i have two of them! I would look for a 96 and up, Nothing wrong with the earlier ones but they are OBD1 and 46rh. I had a 90 that had the A500(same as the 46rh) and liked the shifting of the RE better. If you go to check out a few of them look for rust at the bottom of the doors(common problem). Also look at the frame and anything also that might be compromised with rust. The rear brake line next to the gas tank rust out and burst so check out the brake lines. You won't sorry i had my 96 for 20 years as a daily driver. Here are mine both 96's Indy ram and the black one is my DD 2500 4X4.

[img]https://hosting.photobucket.com/alb...?width=320&height=320&fit=bounds[/img]
[img]https://hosting.photobucket.com/alb...?width=320&height=320&fit=bounds[/img]


Thank you. I've also read that updating the shift solenoid and speed sensor helps as well. I like the 1997-2004 Dakota as well. I've had a couple of them in past (two 4.7 trucks) but, I didn't have them long. At this point, I'll be seeking the Western States as I live in the Rust Belt. Some of the lower mileage truck I've seen recently, haven't addressed the plenum gasket issue on the Magnum based engines. Thank you again and nice trucks.

Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: OrangeProwler] #3109669
01/07/23 10:24 AM
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My 01 went to Michigan about a year ago….. rust free 200k mile AZ pickup. I still see some nice 2nd gens here and there. I put an LMC dash in it about 4 years ago. Probably the biggest issue on that era. Had close to 16 hours in it with all the structural repairs I had to do as the framework is also all plastic and not available anymore. I kind of miss it….. but the 3500 we replaced it with is soooo nice.

A1580E82-9420-4B7D-B3BC-1CD7310F23FC.jpeg
Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: J_BODY] #3109851
01/07/23 06:29 PM
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Originally Posted by J_BODY
My 01 went to Michigan about a year ago….. rust free 200k mile AZ pickup. I still see some nice 2nd gens here and there. I put an LMC dash in it about 4 years ago. Probably the biggest issue on that era. Had close to 16 hours in it with all the structural repairs I had to do as the framework is also all plastic and not available anymore. I kind of miss it….. but the 3500 we replaced it with is soooo nice.



Last edited by RustyMopar01; 01/17/23 02:28 PM.
Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: OrangeProwler] #3109855
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Last edited by RustyMopar01; 01/17/23 02:29 PM.
Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: OrangeProwler] #3109903
01/07/23 08:42 PM
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I've seen a few with that p601 code that doesn't seem to effect anything, trucks still run and drive as expected.
One that comes in occasionally, that code seems intermittent on, the other comes back as soon as s is cleared, every time

Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: volaredon] #3109960
01/08/23 12:53 AM
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Originally Posted by volaredon
I've seen a few with that p601 code that doesn't seem to effect anything, trucks still run and drive as expected.
One that comes in occasionally, that code seems intermittent on, the other comes back as soon as s is cleared, every time


.

Last edited by RustyMopar01; 01/17/23 02:31 PM.
Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: OrangeProwler] #3109996
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P0601 PCM Internal Controller Failure
Use this as a bargaining tool! At least it is telling you what the problem is. You can usually get a used PCM for under/around $200. The later trucks you need to get them programed.

Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: Moparite] #3110045
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Last edited by RustyMopar01; 01/17/23 02:30 PM.
Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: OrangeProwler] #3110199
01/08/23 09:56 PM
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Originally Posted by RustyMopar01
That has been on my mind and I think the seller knows this. I realize the seller is needing to get certain price but, there is a lot of unknowns at this point and not certain the seller & I can come to agreement on price at this point. But, anyways thank you everyone for answering my question. It appears last night, I found some answers regarding the transmission issues which can correlate to corrosion in a harness that communicates with the PCM as well. Anyways, thank you all again.


Can you point me in the direction of the harness corrosion issues so I can research it? My 04 Dakota is driving me nuts going into limp mode with transmission codes. Trans is getting rebuilt, but I want to eliminate all problems since it's a nice little truck that I need to be able to depend on with road trips.

Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: JDMopar] #3110334
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Not sure if this is applicable to Dakotas but, here's the notes regarding the 2nd Generation Ram trucks via these attached pictures.

transtips1.JPGtranstips2.JPG
Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: OrangeProwler] #3110486
01/10/23 01:17 AM
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Originally Posted by RustyMopar01
Not sure if this is applicable to Dakotas but, here's the notes regarding the 2nd Generation Ram trucks via these attached pictures.

Lol, design flaw. Splices like that have been used for two forevers and can be found all around the wiring harness.


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Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: Guitar Jones] #3110841
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True but, some of us are still learning the ropes. If works, it works.

Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: OrangeProwler] #3111879
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Originally Posted by RustyMopar01
True but, some of us are still learning the ropes. If works, it works.


Thanks RustyMopar01. That was a tremendous help and I will check it out. up bow

Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: JDMopar] #3112061
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Put me on the thank you list for the transmission wiring deal. The OD on the RE46 in my 49 pickup (with a 96 Dakota chassis & wiring) quit functioning, and the code reader says it isn't getting input. I now know where to look, if I can get my hands into the area. Things are pretty congested on this truck.

Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: poorboy] #3112138
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over the years, i have uncovered untold issues related to wiring that is located under, or close to, the battery.
i blame this on the battery out-gassing, and the fumes over time eating the harness and nearby connections.
the more the harness is stuffed near the battery, the more problems found.
as the battery ages, the more out-gassing occurs. daily drivers are more prone to this, as nothing is really looked at until a problem or failure pops up.
beer

Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: moparx] #3112211
01/15/23 06:54 PM
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All good info to know as I plan for my 56 C3 build on my 2001 Dak chassis. I'll be shopping for a used auto tranns and I am pretty settled on the 545RFE or 65RFE. Hopefully Mopar has addressed the issues listed aboive as I've not had a Mopar product with an auto trans since the 99 Dakota I sold back in 2003. On my 56 I may plan to locate the battery somewhere other than under the hood, or not even in the original battery box under the cab. Maybe in a chassis mounted marine battyer box on the PS under the bed.


My 56 C3-B8 Dakota build
Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: moparx] #3112269
01/15/23 09:41 PM
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Well, if its a battery issue with the wiring, once I get it cleared up, I should be good. The battery is now in the front corner of the bed. This wiring harness had only 44,000 miles on it between 96 and 2021. The truck was primarily used as a winter ride, and I suspect it sat most summers given the fact the frame was rotted out and there was a Harley sticker on the back window.

Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: poorboy] #3112882
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Glad I could help some of you. Take care.

Last edited by RustyMopar01; 01/17/23 02:33 PM.
Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: poorboy] #3130843
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Originally Posted by poorboy
Put me on the thank you list for the transmission wiring deal. The OD on the RE46 in my 49 pickup (with a 96 Dakota chassis & wiring) quit functioning, and the code reader says it isn't getting input. I now know where to look, if I can get my hands into the area. Things are pretty congested on this truck.


So, I finally had the chance to get under m truck to look for the wire harness splice. Laying on my back, with the truck on jack stands as high as I can get it, there is no way I will be able to get near that splice to fix it. Maybe on a hoist, but I no longer have one available to use. My truck RE46 does not have the lock up functioning (that I can tell), nor the OD functioning, and I still get the code there is no input from the trans, but I'm not getting a limp in condition. I'm betting that splice has corrosion or broken wires.

I have access to the bottom 1/2 of the trans, and I can get my hands around to the top of the trans, I jut can't reach far enough forward to get to the wire where I suspect the splice is, nor would I be able to repair the splice in the area I suspect its in. I would be perfectly OK with relocating that wire splice to a more accessible location. If I can source the wire(s) from the computer that connect to the trans, I would run a new wire down the trans and connect it to the trans wires. Am I correct in assuming there is the feed (or return) wire from the computer and it is spliced to 3 other wires to provide information to (or from) the computer and trans solenoids?

My question is, is there a wire diagram I can get someplace that tells me which wire comes out of the computer, and how and to which wires it connects to on the trans?

I spent much time looking for the wiring from the trans going to the computer but could not see it. (my motor is very close to the firewall in my 49 truck). I am assuming it comes up the trans tunnel and joins the engine harness around the back of the motor? I have an older FSM for a Dakota, but it pre electronic trans era, so the wiring diagram in it is not helpful on this.

Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: poorboy] #3130873
03/20/23 03:02 PM
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it's possible the diagram may be available from the ATSG site, but i don't know if you have to join that group or not.
i have bought manuals for the A500 and A518 from them, but nothing for the RE transmissions.
with that said, i looked at a transmission diagnostic book i have for minivans. yes, i know this is an entirely different thing, and has no bearing on a rear drive application.
however, looking at the wiring diagram, the transmission plug has ground and sense wires going to the computer, and it shows the pin out and diagrams for both, as well as the wire colors.
i'm ASSuming the RE transmission would be similar, but that's as far as i am able to go with any help.
i have no idea if this was worth anything, or if i just threw rock in a mud puddle.
beer

Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: moparx] #3131274
03/21/23 10:24 PM
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I'll look into that.
I was hoping for a Dakota ECM pin out, and the diagrams for the wire pin out at the trans connection. Good thought on a different FSM, that may be helpful.

I think I still have a 97 full sized Ram FSM on cd here (if I can find it eek ) That should at least show me the pin out at the trans connection for a RE46. The ECM on the full Ram is different then the ECM on a Dakota, and then this Dakota is a 96, so that could be a problem as well sourcing out the wire pin out of it.

Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: poorboy] #3131429
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We have an 01' Ram 1500 360 engine, trans and PCM in my Son's 99' Dakota. With a fresh rebuild I did last summer with his help.

photo0.jpegphoto1.jpeg20220624_142109.jpg20220816_195250.jpg

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Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: poorboy] #3131432
03/22/23 12:45 PM
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you may use the full size ram schematic as something of a guide, in that it is still an RE transmission, and just see how the wire colors are arranged on the transmission plug, and how they are arranged in the computer's plug.
one thing i have noticed over the years, looking up similar problems on different years and models with the FSM's i have [printed versions], although the wire colors may have changed, they [sometimes] go to the same cavities in the plugs.
again, i don't know if this will be any help, or further the confusion.
beer

Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: moparx] #3131527
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Still trying to locate that FSM CD for the 97.

I may have to resort to having my wife help me... She probably moved it in a room cleanup. That's my story.... whistling

Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: poorboy] #3132414
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Originally Posted by poorboy
Still trying to locate that FSM CD for the 97.

I may have to resort to having my wife help me... She probably moved it in a room cleanup. That's my story.... whistling


Hopefully, it works for you. I'm just passing the information I found along.

Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: 6PKRTSE] #3132415
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Originally Posted by 6PKRTSE
We have an 01' Ram 1500 360 engine, trans and PCM in my Son's 99' Dakota. With a fresh rebuild I did last summer with his help.


Very nice.

Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: 6PKRTSE] #3132521
03/26/23 08:12 PM
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Freeport IL USA
Originally Posted by 6PKRTSE
We have an 01' Ram 1500 360 engine, trans and PCM in my Son's 99' Dakota. With a fresh rebuild I did last summer with his help.


Are you using the wire harness out of the 1500, or out of the Dakota? Or are you using an aftermarket wire harness, and is so, which one?

Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: poorboy] #3151173
06/13/23 12:23 PM
06/13/23 12:23 PM
Joined: Jan 2003
Posts: 10,534
Freeport IL USA
poorboy Offline
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I'm going to drag this back to the top.

I'm back at square one again. I found the 97 Ram CD, but it won't play on my computer.

The 1st post on the transmission wiring issue says the wire from the TCM and the 2nd wire from the solenoid pack and the 3rd wire from the ECU were wired together.

I believe that splice is the reason I have an intermittent converter lock up and no OD on my 46 RE. It would be easy enough to follow the wires to their source if I could get near the splice, but I can't without removing the transmission. I can get to the plug on the solenoid pack, but not the splice.

Can anyone help me with which wire/cavity the solenoid wire is on the ECU and which wire cavity is is on the TCM? I'm not finding any info on the pin out of either module. I'm using the ECU and the TCM out of a 96 Dakota, if that matters.

In a couple months the truck is going to see 1500+ highway miles and both the OD and the lock up would be nice to have.

HELP!

Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: JDMopar] #3152685
06/19/23 12:53 PM
06/19/23 12:53 PM
Joined: Jan 2003
Posts: 8,479
Candler,NC / Myrtle Beach, SC
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JDMopar Offline
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Originally Posted by JDMopar
Originally Posted by RustyMopar01
That has been on my mind and I think the seller knows this. I realize the seller is needing to get certain price but, there is a lot of unknowns at this point and not certain the seller & I can come to agreement on price at this point. But, anyways thank you everyone for answering my question. It appears last night, I found some answers regarding the transmission issues which can correlate to corrosion in a harness that communicates with the PCM as well. Anyways, thank you all again.


Can you point me in the direction of the harness corrosion issues so I can research it? My 04 Dakota is driving me nuts going into limp mode with transmission codes. Trans is getting rebuilt, but I want to eliminate all problems since it's a nice little truck that I need to be able to depend on with road trips.


Just circling back on the problem with my truck. I checked all of the wiring, relays, fuses, etc and found no problems there. Truck has a new 545RFE with all new sensors and shift solenoid and still had the same problem. Since the truck is almost 20 years old and has 230K miles on it, I decided what the heck....replace the ECM. TCM is integrated on this model. Solved the problem of it going into limp mode with a P0700 and P0750 codes and has not happened since. Truck ran great before, considering it is a 4.7, but I have even noticed it has more giddyup with the new ECM and gets slightly better gas mileage. Hopefully, this may help someone in the future. Remanned ECM was $300 in the link below.
https://www.autocomputerexchange.com/

Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: JDMopar] #3152806
06/19/23 07:56 PM
06/19/23 07:56 PM
Joined: Jan 2003
Posts: 10,534
Freeport IL USA
poorboy Offline
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Freeport IL USA
I had my buddy pull the codes on my truck again today. I've got codes:

P1765 Trans volt relay circuit
P1763 Governor Pressure sensor too high
P0711 Trans temp sensor problem.

I have found an online RE46, RE47, & Re48 specific trans rebuild manual that has a trouble shooting procedure. According to that book the ECM and the trans are the same between the Dakota and the full sized Ram for the same year. I did a quick read of the trouble shooting and discovered that some codes automatically put the trans into failure mode, which is a 3rd only drive with or without an upshift. My truck has no upshift. They required the correct code number for trouble shooting.

That online service manual also stated that a 95 RE 46-48 had a different test procedure then the 96 and up had. In 96 the trans relay was moved into the ECU.

My biggest issue is all this stuff has been transplanted from the Dakota into my 49 truck (and yes, I'm the guy that did it), and now, almost 3 years later, I have no real idea of the Dakota's actual build date and it is long gone.

The challenge has been accepted, I'm sure not going to scrap this truck. Wish me lick as I venture into new to me territory. I will update as I stumble through this. It all starts tomorrow, after I dig a few holes (something like 20 holes!) in the yard for my wife to plant Lilies. Wish me luck on that too! LOL!

100_1017.JPG
Last edited by poorboy; 06/19/23 07:57 PM.
Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: poorboy] #3152930
06/20/23 07:40 AM
06/20/23 07:40 AM
Joined: Jan 2006
Posts: 8,162
USA
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Originally Posted by poorboy
I had my buddy pull the codes on my truck again today. I've got codes:

P0711 Trans temp sensor problem.



Just a heads up that I have routinely found that P0711 Trans temp sensor code set on my 1995 Ram every time I have plugged in a scanner, which is OBD-I for that last year before OBD-II.

There is not supposed to be a Trans Temp sensor on 1500 Rams, just on 2500/3500 Rams.

I even tried buying a Trans Temp sensor and plugging it into the empty electrical socket, but the code kept getting set.

It may be a factory PCM software error,
a physical 1500 Ram wiring harness fault,
or an evil spirit.

Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: 360view] #3153035
06/20/23 12:38 PM
06/20/23 12:38 PM
Joined: Jan 2003
Posts: 10,534
Freeport IL USA
poorboy Offline
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Freeport IL USA
I believe the 1765 - trans 12 volt supply relay circuit code is my problem.

This truck does have OBD2. According to the info I can find, the under hood power distribution box is suppose to have a transmission 12 volt power supply relay, those relay terminals have specific functions. My problem is, there is nothing labeled as a transmission relay in the distribution box that has 6 relays. That unidentified relay is suppose to provide the power to the transmission 12 volt solenoid power.
I
I've managed to get the wiring loose from the trans and I have gotten the harness connector down where I can at least test for the 12 volt and the .5 volt from the computer. I came in the house to bring up that RE46 trans rebuild site, and the stupid thing won't load this morning. : nervous II did make a few notes last night, so I can at lest test for the voltage, I suspect I probably don't have any at either place. Originally I suspected the splice in the harness at the top of the trans was bad. I still can't get there.

Without a relay specifically marked as the trams relay, I have no idea where the 12 volt power would come from, everything says it comes from that missing relay.

Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: poorboy] #3153373
06/21/23 06:05 PM
06/21/23 06:05 PM
Joined: Jan 2003
Posts: 10,534
Freeport IL USA
poorboy Offline
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Freeport IL USA
Ok, I have no transmission relay anywhere that I can find. See picture of the power distribution center on my truck. This is a 96 truck with the OBD 2 system and the PCM has 3 plugs attached to it.

I have no 12 volt power to the harness connection at the trans on terminal #1. That 12 volt power is suppose to come from the trans relay.

I am unsure of the condition of the wiring at the top of the trans where the splice that has known issues is located.

I think I'm going to add my own transmission relay. According to the wiring diagrams I've found (suppose to be reprinted FSM diagrams), the 4 terminals on the relay that are used has (1) battery power, (1) ignition power, (1) PMC supplied ground wire, and (1) 12 volt powered wire to the harness connector. #1 terminal. I would run that 12 volt power wire directly to the #1 terminal, which provides power to the solenoid pack. That ignition controlled power to the relay would shut down the power when the truck is off, correct?

From what I've read, that computer supplied ground can be shut off by the PCM if it detects a fault code. This transmission has been operating a year with the existing codes. If I eliminate the PCM supplied ground and just did a straight ground, other then the PCM loosing the ability to turn off the OD and put the trans into a 3rd gear only drive, what else can happen? It wouldn't be too hard to put a shut off switch on that ground wire to kill the power from the relay.

I believe if I can power the solenoid pack, the OD would work. After some use, I may even be able to try to connect back to the PMC supplied ground.

Thoughts?

If i don't hear anything negative, its going to happen tomorrow morning!

100_1059.JPG
Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: poorboy] #3153556
06/22/23 12:33 PM
06/22/23 12:33 PM
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Atlanta, GA
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Does the wiring harness plug at the trans end have 2, 3, or 8 wires? 2 or 3 it is a 46rh, 8 wires it is a 46re version.

Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: mgoblue9798] #3153649
06/22/23 07:27 PM
06/22/23 07:27 PM
Joined: Jan 2003
Posts: 10,534
Freeport IL USA
poorboy Offline
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The trans is most definitely an 46RE. And it is definitely a 96 production model. At this point, I suspect maybe it was an early production 96..

The good news is it now WORKS. The OD has cut the 70 mph rpm by nearly 1,000 rpm, it happily cruises along at about 2,000 at 70 mph on the cruise control where last Sat night on the same road, it wanted to turn 3,000 at 70 on the cruise control. I knew it was fixed as I pulled out of my driveway. Before it was sort of lazy leaving a stop, but now that it s downshifting, its back to being fun.

First what happened, and then the fix.

When the truck was 1st put on the road, I used the Dakota aluminum/plastic radiator. I had to modify the top radiator brackets for it to work, and both top corners were very close to the 49s curved hood sides. About 6 months into driving the truck (its 1st winter), the OEM Dakota radiator started leaking at the gasket between the top plastic tank and the aluminum core. It actually would not leak if the temp was above 15 degrees, but when it dropped below 15, it started seeping. The leak would go away shortly after the truck started. It took a few months before I actually saw where the coolant was going when I happened to look on a day it was 10 degrees outside.
I changed to a Champion aluminum radiator that better fit the confines of the truck, but that required the removal of the manual fan because of clearance. I installed an electric fan with the new radiator. While I was looking for a power source for that electric fan, I noticed the distribution box had a "fan relay" that was not being used, because there obviously was not an electric fane on the truck. I hijacked the key source 12 volt power wire from the fan relay to run my electric fan. The radiator replacement also required a moderation in the transmission cooling line routing. The new radiator was a crossflow with the trans cooler on the passenger side, the original was a top to bottom flow with the cooler in the lower tank. About 3 or 4 weeks after the radiator was installed, one of the trans cooler lines blew the hose off. I didn't know it until the truck stopped moving (about 3 miles from where the fluid trail began). I did a parking lot repair on the line, and dumped 8 quarts of AFT +4 into the trans. The trans appeared to operate OK except I noticed the OD was not functioning (the weather was warmer and we were doing more driving). The consonance here concluded the loss of the trans fluid killed the OD solenoids and probably caused deadly transmission problems. I accepted that and was waiting for a total failure, pulling this trans will be a major pita.

This post alerted me to the concept the fluid loss might not be the cause of the OD loss.

The fix: After spending much of yesterday looking for the missing trans relay, I was prepared to create a fan relay from scratch this morning, but the thought that the OD worked when the truck was first put together pushed me to find that missing relay. In my search for the trans relay, I began to wonder if one of the relays was mislabeled. The most obvious choice was the "fan relay". With the plugs off the trans, and the distribution box pulled up where I could check out the wiring, I started checking where the existing wires on the fan relay went. 4 wires. One (already cut) was a 12 volt ignition source. One was a battery power source. Both required for the trans relay. One wire was a 5 volt from the computer (required for the trans relay, but not required for a fan relay). The other wire had continuity with the #1 terminal on the trans connector (also required for the trans relay). My conclusion was, Mopar decided to use the 95 distribution box on the early 96 trucks, and substitute the fan relay that was only used on the 4 cylinder trucks as the location for the new trans relay. Not a bad idea, but they should have told at least their service department.

I restored the 12 volt ignition source back to the relay and reassembled the truck, and the OD works, and the trans also downshifts and upshifts. In a couple weeks we will run the codes again and see if we still have any transmission codes. For right now, I am a happy camper.

Re: 94-95 Ram vs 96+ Ram vs Dakota (Transmission Related) [Re: poorboy] #3154976
06/28/23 03:41 PM
06/28/23 03:41 PM
Joined: Aug 2007
Posts: 1,819
Middle of A Field
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Originally Posted by poorboy
The trans is most definitely an 46RE. And it is definitely a 96 production model. At this point, I suspect maybe it was an early production 96..

The good news is it now WORKS. The OD has cut the 70 mph rpm by nearly 1,000 rpm, it happily cruises along at about 2,000 at 70 mph on the cruise control where last Sat night on the same road, it wanted to turn 3,000 at 70 on the cruise control. I knew it was fixed as I pulled out of my driveway. Before it was sort of lazy leaving a stop, but now that it s downshifting, its back to being fun.

First what happened, and then the fix.

When the truck was 1st put on the road, I used the Dakota aluminum/plastic radiator. I had to modify the top radiator brackets for it to work, and both top corners were very close to the 49s curved hood sides. About 6 months into driving the truck (its 1st winter), the OEM Dakota radiator started leaking at the gasket between the top plastic tank and the aluminum core. It actually would not leak if the temp was above 15 degrees, but when it dropped below 15, it started seeping. The leak would go away shortly after the truck started. It took a few months before I actually saw where the coolant was going when I happened to look on a day it was 10 degrees outside.
I changed to a Champion aluminum radiator that better fit the confines of the truck, but that required the removal of the manual fan because of clearance. I installed an electric fan with the new radiator. While I was looking for a power source for that electric fan, I noticed the distribution box had a "fan relay" that was not being used, because there obviously was not an electric fane on the truck. I hijacked the key source 12 volt power wire from the fan relay to run my electric fan. The radiator replacement also required a moderation in the transmission cooling line routing. The new radiator was a crossflow with the trans cooler on the passenger side, the original was a top to bottom flow with the cooler in the lower tank. About 3 or 4 weeks after the radiator was installed, one of the trans cooler lines blew the hose off. I didn't know it until the truck stopped moving (about 3 miles from where the fluid trail began). I did a parking lot repair on the line, and dumped 8 quarts of AFT +4 into the trans. The trans appeared to operate OK except I noticed the OD was not functioning (the weather was warmer and we were doing more driving). The consonance here concluded the loss of the trans fluid killed the OD solenoids and probably caused deadly transmission problems. I accepted that and was waiting for a total failure, pulling this trans will be a major pita.

This post alerted me to the concept the fluid loss might not be the cause of the OD loss.

The fix: After spending much of yesterday looking for the missing trans relay, I was prepared to create a fan relay from scratch this morning, but the thought that the OD worked when the truck was first put together pushed me to find that missing relay. In my search for the trans relay, I began to wonder if one of the relays was mislabeled. The most obvious choice was the "fan relay". With the plugs off the trans, and the distribution box pulled up where I could check out the wiring, I started checking where the existing wires on the fan relay went. 4 wires. One (already cut) was a 12 volt ignition source. One was a battery power source. Both required for the trans relay. One wire was a 5 volt from the computer (required for the trans relay, but not required for a fan relay). The other wire had continuity with the #1 terminal on the trans connector (also required for the trans relay). My conclusion was, Mopar decided to use the 95 distribution box on the early 96 trucks, and substitute the fan relay that was only used on the 4 cylinder trucks as the location for the new trans relay. Not a bad idea, but they should have told at least their service department.

I restored the 12 volt ignition source back to the relay and reassembled the truck, and the OD works, and the trans also downshifts and upshifts. In a couple weeks we will run the codes again and see if we still have any transmission codes. For right now, I am a happy camper.


Great to hear. I hope it works you for you in the end.

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