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46 RE to 8 hp Trans swap #2929911
06/03/21 09:41 PM
06/03/21 09:41 PM
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Houston, Texas
TheOtherDodge Offline OP
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Just curious, has anyone done this on a magnum motor? I am researching this for my 2000 Dakota. I know they finally make a standalone TCU. The swap would make a world of difference vs the original in terms of performance and mileage. Going from the 46RE with a 3.90 gear, the 8 hp with a 3.21 would give a gear multiplication of better than a 4.88! And the RPM drop at 60 and 70 mph is awesome!

11.jpg
Last edited by TheOtherDodge; 06/04/21 02:18 PM.
Re: 45 RFE to 8 hp Trans swap [Re: TheOtherDodge] #2929941
06/03/21 11:15 PM
06/03/21 11:15 PM
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This is a neat project. I have a 99 that I've been pondering a complete swap to a G3/8sp but I might just change the trans.

Will you need to use the shifter from a donor or can you frankenwire the column shifter to work?
I'll be following this thread and the other one you have going.
-Ken

Re: 45 RFE to 8 hp Trans swap [Re: A990] #2930050
06/04/21 02:17 PM
06/04/21 02:17 PM
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TheOtherDodge Offline OP
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I will have to use a shifter from an 8 speed, but that is not an issue. They make a trans controller now that requires a brake and rpm input (no biggie). My only hurdle (hopefully) is how to "relocate" the factory crankshaft position sensor, since the 8 speed does not have a tone ring on the flywheel.

Re: 45 RFE to 8 hp Trans swap [Re: TheOtherDodge] #2930203
06/05/21 06:46 AM
06/05/21 06:46 AM
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Is the G3 bell housing pattern the same as magnum? Similar results and be done with a Gear Vendors unit with the 46re.

Re: 45 RFE to 8 hp Trans swap [Re: redraptor] #2930222
06/05/21 09:15 AM
06/05/21 09:15 AM
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Gear vendors is just an overdrive, 8 individual gears is way better! Can you supply more info on this? Who and do you have a link to control the 8 speeds? Not up on the bell housing bolt patterns but will it bolt up to magnum/LA without a adapter? Same for the flywheel/flex plate? I seen a post somewhere where they used a 727(or another trans don't remember) with a magnum motor and fabbed up their own mount that was welded to the bell housing.

Re: 45 RFE to 8 hp Trans swap [Re: Moparite] #2930226
06/05/21 09:30 AM
06/05/21 09:30 AM
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Fort Worth, Texas
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Originally Posted by Moparite
Gear vendors is just an overdrive, 8 individual gears is way better! Can you supply more info on this? Who and do you have a link to control the 8 speeds? Not up on the bell housing bolt patterns but will it bolt up to magnum/LA without a adapter? Same for the flywheel/flex plate? I seen a post somewhere where they used a 727(or another trans don't remember) with a magnum motor and fabbed up their own mount that was welded to the bell housing.


iagree The ZF 8 speed is as big an advancement as overdrive was over 3 speeds. IIRC, the late hemi's use the old small block trans pattern, so bolting it up should be the easy part.


'68 Fury Convertible
'69 300 Convertible
'93 Ramcharger 5.7 Hemi
'93 Ramcharger 318 sold
'01 3500 4x4 Cummins 6 speed sold
'13 300 S sold
'15 Durango 5.7 Hemi
'16 300 S Hemi
Re: 45 RFE to 8 hp Trans swap [Re: 3hundred] #2930290
06/05/21 02:16 PM
06/05/21 02:16 PM
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TheOtherDodge Offline OP
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The obvious answer as to why the 8 speed is in my chart of the gear multiplication. Plus, the shift speeds I believe is around 20 miliseconds.

Sound German makes the TCU that is needed. This needs an RPM and brake signal.

Yes, the bolt pattern for the new Hemi and Magnum/LA are the same so they bolt right up. However, there is some finagling for the flexplate/flywheel/converter, mainly due to the tone ring on the Magnum flexplate and the balance on the converter.

Re: 45 RFE to 8 hp Trans swap [Re: TheOtherDodge] #2930459
06/06/21 10:16 AM
06/06/21 10:16 AM
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8hp: Prices start at 1000.00 As per their web site.
https://www.soundgermanautomotive.com/pcs/

Actually PCS makes the controller not sure what they do as a middle man. More like just a reseller.

https://www.powertraincontrolsoluti...M2800_Transmission_Controller/A-TCM2800/

More i think about this i think a full Hemi swap would be easier.

Re: 45 RFE to 8 hp Trans swap [Re: Moparite] #2930464
06/06/21 10:36 AM
06/06/21 10:36 AM
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Is there a TCU with a push button shifter or paddle shift capability?

Re: 45 RFE to 8 hp Trans swap [Re: Moparite] #2930742
06/07/21 12:43 AM
06/07/21 12:43 AM
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Salem
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Originally Posted by Moparite
i think a full Hemi swap would be easier.


And another 150 horsepower over the Magnum. Better fuel mileage from the Gen 3 is the icing on the cake.

Not that I don't want to see this done, I really like my Magnums and it would be neat as hell to have an 8 speed on one. up


Mo' Farts

Moderated by "tbagger".
Re: 45 RFE to 8 hp Trans swap [Re: Grizzly] #2930772
06/07/21 08:24 AM
06/07/21 08:24 AM
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TheOtherDodge Offline OP
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Oh no, a full hemi swap would not be easier.. Have to integrate the Hemi dash, gas and brake pedals, etc.

Besides, the only Hemi that makes more power than my Magnum is the 6.4 or Hellcats. And I have a well built motor with forged internals.

Re: 45 RFE to 8 hp Trans swap [Re: redraptor] #2931123
06/07/21 11:10 PM
06/07/21 11:10 PM
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Originally Posted by redraptor
Is the G3 bell housing pattern the same as magnum? Similar results and be done with a Gear Vendors unit with the 46re.


Yes bellhousing is the same as the A/LA/Magnum engines

, I have a 46RH in my 04 GTX ram, going back to a 518 NON-lock up next month...I had both a 46RH and then a 727 in my 2014 before I sold the rolling chassis. My Brother runs a 727 behind his current 441ci G3 in his 09 Ram. Sound germen is the best place to go for what you need to swap the 8sp in to any Mopar platform.. they are on the expensive side compared to DIYHEMI. Swapping a G3 in to the 94-01 rams is not hard DIYhemi makes it painless , and if you are not worried about Emissions

Holley Terminator is the way to go.


04 Ram 4x2 11.66@ 122 4750LBS ...phat pig Moves for fully loaded truck with NA 345ci Hemi
2020 1320 Challenger....stock daily driver.
Re: 45 RFE to 8 hp Trans swap [Re: TheOtherDodge] #2931312
06/08/21 03:10 PM
06/08/21 03:10 PM
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Originally Posted by TheOtherDodge
I will have to use a shifter from an 8 speed, but that is not an issue. They make a trans controller now that requires a brake and rpm input (no biggie). My only hurdle (hopefully) is how to "relocate" the factory crankshaft position sensor, since the 8 speed does not have a tone ring on the flywheel.


Im missing something.. When did they relocate the Crankshaft position sensor?

https://www.youtube.com/watch?v=F59fuspn-Eg

Matt

Re: 45 RFE to 8 hp Trans swap [Re: MattW] #2931471
06/08/21 10:03 PM
06/08/21 10:03 PM
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TheOtherDodge Offline OP
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Originally Posted by MattW
Originally Posted by TheOtherDodge
I will have to use a shifter from an 8 speed, but that is not an issue. They make a trans controller now that requires a brake and rpm input (no biggie). My only hurdle (hopefully) is how to "relocate" the factory crankshaft position sensor, since the 8 speed does not have a tone ring on the flywheel.


Im missing something.. When did they relocate the Crankshaft position sensor?

https://www.youtube.com/watch?v=F59fuspn-Eg

Matt


I watched a little bit of the video and didn't see the relevance to your question so maybe I don't understand what it is? The Magnum motor has a CPS tone ring on the flexplate. The Hemi's have them located somewhere else (not sure where) so there is no tone ring on the flywheel. Notice the Magnum has a flexplate with a tone ring and the starter ring gear on the converter. The Hemi has the starter ring gear on the flexplate. Did that answer your question?

Re: 45 RFE to 8 hp Trans swap [Re: TheOtherDodge] #2931542
06/09/21 09:03 AM
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Originally Posted by TheOtherDodge
Originally Posted by MattW
Originally Posted by TheOtherDodge
I will have to use a shifter from an 8 speed, but that is not an issue. They make a trans controller now that requires a brake and rpm input (no biggie). My only hurdle (hopefully) is how to "relocate" the factory crankshaft position sensor, since the 8 speed does not have a tone ring on the flywheel.


Im missing something.. When did they relocate the Crankshaft position sensor?

https://www.youtube.com/watch?v=F59fuspn-Eg

Matt


I watched a little bit of the video and didn't see the relevance to your question so maybe I don't understand what it is? The Magnum motor has a CPS tone ring on the flexplate. The Hemi's have them located somewhere else (not sure where) so there is no tone ring on the flywheel. Notice the Magnum has a flexplate with a tone ring and the starter ring gear on the converter. The Hemi has the starter ring gear on the flexplate. Did that answer your question?


Nope MY BAD. Did not read the question properly. Was under the assumption that you were swapping a G3 engine.

The video shows a company that make a stand alone 8HP controller.

Matt

Re: 45 RFE to 8 hp Trans swap [Re: JP8] #2931568
06/09/21 11:07 AM
06/09/21 11:07 AM
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Originally Posted by JP8
Is there a TCU with a push button shifter or paddle shift capability?


Yes, Sound German sells paddle shifters for their controller as well.

I think the easiest solution is get the manual flywheel for the magnum and have a machine shop cut out the clutch face. Mount the torque convertor to that and just figure out the spacing you need off.

Re: 45 RFE to 8 hp Trans swap [Re: roadrunninMark] #2931942
06/10/21 11:48 AM
06/10/21 11:48 AM
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TheOtherDodge Offline OP
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Originally Posted by roadrunninMark
Originally Posted by JP8
Is there a TCU with a push button shifter or paddle shift capability?


Yes, Sound German sells paddle shifters for their controller as well.

I think the easiest solution is get the manual flywheel for the magnum and have a machine shop cut out the clutch face. Mount the torque convertor to that and just figure out the spacing you need off.


Hmmm...good idea...

flywheel.jpg
Re: 45 RFE to 8 hp Trans swap [Re: TheOtherDodge] #2931968
06/10/21 01:02 PM
06/10/21 01:02 PM
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I found a little more info for you, on the correct counter weight, in this thread... https://board.moparts.org/ubbthread...24811/magnum-360-flexplate-solution.html

"I based all my numbers on mopar spec. LA engines require 19.79 in.oz. Magnums 14.65 in.oz. of weight offset.

Also, am relying on the 1/8 inch thickness of B&M steel being fairly consistent.

BTW, steel = 4.537 oz/cubic inch"

Re: 45 RFE to 8 hp Trans swap [Re: roadrunninMark] #2932005
06/10/21 02:48 PM
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I think your flywheel idea is going in the correct direction... :-)

Re: 46 RE to 8 hp Trans swap [Re: TheOtherDodge] #2932176
06/11/21 02:53 AM
06/11/21 02:53 AM
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Taken good project!

I never did this experiment ago on magnum motor, If you find any solution with magnum then drop the final view

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