Re: 73 W100 Drivetrain vibration
[Re: northcoastmopar]
#2788349
06/23/20 07:59 AM
06/23/20 07:59 AM
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NITROUSN
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Cool thanks...yes, phased is probably the better word than parallel. Take pics of each of the u-joints and try to do so at the same orientation? If possible try to get a complete picture including the yokes of each shaft. The intermediate or jack shaft is the one I would like to see
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Re: 73 W100 Drivetrain vibration
[Re: NITROUSN]
#2788368
06/23/20 09:25 AM
06/23/20 09:25 AM
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northcoastmopar
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Cool thanks...yes, phased is probably the better word than parallel. Take pics of each of the u-joints and try to do so at the same orientation? If possible try to get a complete picture including the yokes of each shaft. The intermediate or jack shaft is the one I would like to see Got it. Will grab pics tonight. Thanks!
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Re: 73 W100 Drivetrain vibration
[Re: buildanother]
#2788415
06/23/20 11:11 AM
06/23/20 11:11 AM
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northcoastmopar
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If the splined yoke has never been slipped off of drive shaft, it all should be fine. I learned that long ago because some shafts do not have that double key that only lets the two go back together one way. If you index it any way you want, there will be huge bad vibes. I have no idea regarding the history of this truck. The seller fibbed and omitted a lot of things so I don't know what's original or been monkeyed with.
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Re: 73 W100 Drivetrain vibration
[Re: northcoastmopar]
#2788434
06/23/20 12:06 PM
06/23/20 12:06 PM
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W.I.N. Racing
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Id start with correcting the phase angle (new U joints as long as your there)
'01 P1500, Blown/Inj BAE,/Veney ,Bruno/CS2,Dana 60 '01 Dodge 3500 S Cummins Auto, Fresh air kit, 4" Exhaust, '05 Dodge Magnum R/T - Too Much to list '60 Willys CJ5 '01 International LPX - Project,DT466, Allison '64 Plymouth Valiant, Inj 528 Hemi, 2spd
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Re: 73 W100 Drivetrain vibration
[Re: NITROUSN]
#2788738
06/24/20 08:54 AM
06/24/20 08:54 AM
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northcoastmopar
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NITROUSN -
Thanks...ugh...another clear example of why not to buy a vehicle from across the country without inspecting in person. A drunken eBay purchase....
I'm assuming this is the type of jackshaft I need if I had the correct short tail trans? I can check FSM when I get home but do you know model number of correct tail trans I need? I assume these are a little hard to find and I have to decide whether I want to sink the cash or just part ways. It's a shame, because it's a cool truck. 99% rust free, 400bb, a/c, cruise, two tanks, camper package...etc.
I will probably mess with it removing the front driveshaft and getting pics of the trans mount tonight...grrrrr.......
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Re: 73 W100 Drivetrain vibration
[Re: northcoastmopar]
#2788943
06/24/20 06:53 PM
06/24/20 06:53 PM
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Guitar Jones
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Those shorty 727s came in a lot of different trucks. My 85 D350 crew had one but it was a 360. Still easy fix, you just need the output shaft and tail shaft to swap into yours.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion. '74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost coming soon! 2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: 73 W100 Drivetrain vibration
[Re: Guitar Jones]
#2788953
06/24/20 07:22 PM
06/24/20 07:22 PM
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savoy64
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even 89-91 cummins trucks were running the short shaft 727 with a big yoke------all you need is the tail housing -main shaft to rebuild your tranny and there is good stuff in there like a 5 pinion sun gear,-----the big yoke will also fit on the back of your old push button transmission .....
Last edited by savoy64; 06/24/20 07:25 PM.
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Re: 73 W100 Drivetrain vibration
[Re: RON]
#2788995
06/24/20 09:36 PM
06/24/20 09:36 PM
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NITROUSN
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That is the right tail shaft from e-bay and the short shaft pictured is correct but you can see it also is not phased correctly. Cross member looks good. Look and see if the top of the cross member to frame rail is shimmed down. I see a gap and most likely the guy who worked on it was trying to correct the angle due to vibration. As said best to replace the tail housing and shaft along with the correct short shaft. Bolt the cross member solid and you should be good to go. Question with the truck in park and you increase the rpm's is there any vibration? Just making sure the converter in correct balance wise to the motor. That would be just one more problem the builder could of caused.
Last edited by NITROUSN; 06/24/20 09:37 PM.
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Re: 73 W100 Drivetrain vibration
[Re: NITROUSN]
#2788997
06/24/20 09:46 PM
06/24/20 09:46 PM
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northcoastmopar
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That is the right tail shaft from e-bay and the short shaft pictured is correct but you can see it also is not phased correctly. Cross member looks good. Look and see if the top of the cross member to frame rail is shimmed down. I see a gap and most likely the guy who worked on it was trying to correct the angle due to vibration. As said best to replace the tail housing and shaft along with the correct short shaft. Bolt the cross member solid and you should be good to go. Question with the truck in park and you increase the rpm's is there any vibration? Just making sure the converter in correct balance wise to the motor. That would be just one more problem the builder could of caused. No vibrations in Park with increase in RPMs. Ok I’ll snag the rear housing. Will try to find a not so spendy intermediate shaft. Haven’t seen any others out there. I “think” it’s part number 3516037. Also checked the driveshafts and all the u-joints were ok. Put the rear tail shaft in phase and left the front off for now. Will fix it right. Still hoping to drive it to the Nats. Thanks for everyone’s help! I’m sure Ill be back with more questions shortly.
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Re: 73 W100 Drivetrain vibration
[Re: NITROUSN]
#2789073
06/25/20 06:14 AM
06/25/20 06:14 AM
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northcoastmopar
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No vibrations is good at least there is not another problem. How much did they want for the short shaft? They were the same for many years. For sure 72-74 and I believe even older. Also same on all model 4wd 100 to 300 series. Just be sure they take the small joint. $176.00 + shipping
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Re: 73 W100 Drivetrain vibration
[Re: northcoastmopar]
#2790058
06/27/20 07:43 PM
06/27/20 07:43 PM
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Guitar Jones
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I'm going to put a NV4500 in my 74 with the divorced T/C. The NV is about 8" longer than the NP435 in it. I was looking at how short of a shaft I could make and/or moving the transfer case back about 4-6 inches but that solution you have right there never crossed my mind. Looks like something the redneck Carolina boys that owned my truck before me would have done.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion. '74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost coming soon! 2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: 73 W100 Drivetrain vibration
[Re: Guitar Jones]
#2790216
06/28/20 09:31 AM
06/28/20 09:31 AM
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northcoastmopar
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I'm going to put a NV4500 in my 74 with the divorced T/C. The NV is about 8" longer than the NP435 in it. I was looking at how short of a shaft I could make and/or moving the transfer case back about 4-6 inches but that solution you have right there never crossed my mind. Looks like something the redneck Carolina boys that owned my truck before me would have done. Yep...mine was butchered a bit. Got parts on the way, looking for someone to rebuild it near me. I’m wondering if I’ll have to drop the TC if that rigged jack shaft and presses hard against the trans. Otherwise I don’t know if I can drop the trans.
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Re: 73 W100 Drivetrain vibration
[Re: NITROUSN]
#2790228
06/28/20 10:34 AM
06/28/20 10:34 AM
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That doesn't even come close to covering the problem!! I can't believe the previous owner butchered the intermediate shaft like that. BTW, If you have to replace any of the splined slip joints, you may want to consider retrofitting with the later accordion bellow boots. I did this on all three slip joints on my '72 W200.
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
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Re: 73 W100 Drivetrain vibration
[Re: NITROUSN]
#2790573
06/29/20 07:13 AM
06/29/20 07:13 AM
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I’m wondering if I’ll have to drop the TC if that rigged jack shaft and presses hard against the trans. Otherwise I don’t know if I can drop the trans.
The shaft is junk so just cut it in half. The transmission will come out then. Good call.
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Re: 73 W100 Drivetrain vibration
[Re: northcoastmopar]
#2884888
02/06/21 10:25 PM
02/06/21 10:25 PM
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NITROUSN
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As far as I can recall the factory cross member in that year was bolted directly to the frame rails. You might have to research that to be sure. I can not recall it being shimmed down. That 205 case is tough. I would fix any visable leaks and run it as is. Save your money.
Last edited by NITROUSN; 02/06/21 10:30 PM.
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Re: 73 W100 Drivetrain vibration
[Re: NITROUSN]
#2884909
02/06/21 11:22 PM
02/06/21 11:22 PM
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northcoastmopar
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As far as I can recall the factory cross member in that year was bolted directly to the frame rails. You might have to research that to be sure. I can not recall it being shimmed down. That 205 case is tough. I would fix any visable leaks and run it as is. Save your money. It has plenty of leaks. I’ll get a seal kit for it and clean it up.
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Re: 73 W100 Drivetrain vibration
[Re: NITROUSN]
#2885553
02/08/21 02:51 PM
02/08/21 02:51 PM
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jcruse64
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Saw your thread on RamchargerCentral, and answered there, but you should be able to get a wrench on those bolt heads; I don't remember a "cap" on those bolt heads. It has a small plate under the two bolts, but mine did not had a bent-up keeper on the two bolts, on my '73. As I'd said over there, I'd put new mount bushings in, while it's out.
On the transmission crossmember, mine is a bolted-on situation, also, so I'm guessing that's a factory thing. How is the tailshaft mount? Mine was bad, and the engine/tranny had torqued towards the driver side, to the point that the tailshaft mount was vibrating a notch on the crossmember. I got a new mount, loosened everything up, and straightened the whole thing out. I still have vibration that starts around 42 mph, so something is still not right on mine. Stub shaft was balanced with the other 2 driveshafts, along with new Spicer u-joints, but I've read that it does not take much to get the stub shaft to cause vibration in these trucks.
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Re: 73 W100 Drivetrain vibration
[Re: jcruse64]
#2885665
02/08/21 09:25 PM
02/08/21 09:25 PM
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northcoastmopar
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Saw your thread on RamchargerCentral, and answered there, but you should be able to get a wrench on those bolt heads; I don't remember a "cap" on those bolt heads. It has a small plate under the two bolts, but mine did not had a bent-up keeper on the two bolts, on my '73. As I'd said over there, I'd put new mount bushings in, while it's out.
On the transmission crossmember, mine is a bolted-on situation, also, so I'm guessing that's a factory thing. How is the tailshaft mount? Mine was bad, and the engine/tranny had torqued towards the driver side, to the point that the tailshaft mount was vibrating a notch on the crossmember. I got a new mount, loosened everything up, and straightened the whole thing out. I still have vibration that starts around 42 mph, so something is still not right on mine. Stub shaft was balanced with the other 2 driveshafts, along with new Spicer u-joints, but I've read that it does not take much to get the stub shaft to cause vibration in these trucks. My tail shaft was butchered like the rest of the install. The horizontal trans mount bolt wasn’t installed through the bushing that is surrounded by the rubber...it was installed through the rubber in a hole cut through under the bushing. Was hard to get the bolt out.
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Re: 73 W100 Drivetrain vibration
[Re: northcoastmopar]
#2885681
02/08/21 10:10 PM
02/08/21 10:10 PM
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NITROUSN
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Was able to get my phone up there and get a pic. I see what I have now, it’s a pretty stout plate that straddles both bolts with a corner bent over each of the bolt heads.
Just got to get something in there to bend the corner down.
Fun.
That's the way I pictured it. The tabs have to be bent back to get the bolts out. That case is heavy and can be a pain in the butt getting the bolts back in. If you are just replacing the seals I would do it in the truck.
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Re: 73 W100 Drivetrain vibration
[Re: jcruse64]
#2885731
02/09/21 12:56 AM
02/09/21 12:56 AM
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mopardude318
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I'd put new mount bushings in, while it's out.
where do you source the new bushings for the divorced transfer case crossmember mounts?
408 Stroker 533 HP 520 FT LBS...........................1970 Dart RMS AlterKation
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Re: 73 W100 Drivetrain vibration
[Re: northcoastmopar]
#2886289
02/10/21 12:12 PM
02/10/21 12:12 PM
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Joined: May 2014
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jcruse64
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Saw your thread on RamchargerCentral, and answered there, but you should be able to get a wrench on those bolt heads; I don't remember a "cap" on those bolt heads. It has a small plate under the two bolts, but mine did not had a bent-up keeper on the two bolts, on my '73. As I'd said over there, I'd put new mount bushings in, while it's out.
On the transmission crossmember, mine is a bolted-on situation, also, so I'm guessing that's a factory thing. How is the tailshaft mount? Mine was bad, and the engine/tranny had torqued towards the driver side, to the point that the tailshaft mount was vibrating a notch on the crossmember. I got a new mount, loosened everything up, and straightened the whole thing out. I still have vibration that starts around 42 mph, so something is still not right on mine. Stub shaft was balanced with the other 2 driveshafts, along with new Spicer u-joints, but I've read that it does not take much to get the stub shaft to cause vibration in these trucks. My tail shaft was butchered like the rest of the install. The horizontal trans mount bolt wasn’t installed through the bushing that is surrounded by the rubber...it was installed through the rubber in a hole cut through under the bushing. Was hard to get the bolt out. Mine was broken. The one on it also had a hole for lining up and bolting the bottom of the "V" to the crossmember. My replacement did not. I don't remember the corners on my plate being bent up for a "keeper". Maybe I forgot, lol. Good luck!
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Re: 73 W100 Drivetrain vibration
[Re: mopardude318]
#2886291
02/10/21 12:14 PM
02/10/21 12:14 PM
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jcruse64
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I'd put new mount bushings in, while it's out.
where do you source the new bushings for the divorced transfer case crossmember mounts? https://www.amazon.com/Energy-Suspension-9-4101G-UNIVERSAL-MOUNT/dp/B000CN9BZ0/ref=sr_1_2?dchild=1&keywords=Energy+Suspension%27s+9.4101G+Universal+Mount&link_code=qs&qid=1612973356&sourceid=Mozilla-search&sr=8-2&tag=mozilla-20 These are perfect replacements for the OEM rubber ones. I bought 205 bushings for a Bronco of that era, and they did not work. These do. Thanks goes to user KurtfromLaquinta on RCC; he;d used them when he rebuilt his 1974 W100, and they worked well for him.
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Re: 73 W100 Drivetrain vibration
[Re: jcruse64]
#2886636
02/11/21 02:08 AM
02/11/21 02:08 AM
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mopardude318
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I'd put new mount bushings in, while it's out.
where do you source the new bushings for the divorced transfer case crossmember mounts? https://www.amazon.com/Energy-Suspension-9-4101G-UNIVERSAL-MOUNT/dp/B000CN9BZ0/ref=sr_1_2?dchild=1&keywords=Energy+Suspension%27s+9.4101G+Universal+Mount&link_code=qs&qid=1612973356&sourceid=Mozilla-search&sr=8-2&tag=mozilla-20 These are perfect replacements for the OEM rubber ones. I bought 205 bushings for a Bronco of that era, and they did not work. These do. Thanks goes to user KurtfromLaquinta on RCC; he;d used them when he rebuilt his 1974 W100, and they worked well for him. alright thanks! Looks like I have to order 2 of those kits?
408 Stroker 533 HP 520 FT LBS...........................1970 Dart RMS AlterKation
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Re: 73 W100 Drivetrain vibration
[Re: northcoastmopar]
#2891773
02/22/21 09:52 AM
02/22/21 09:52 AM
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Also, one freeze plug on each side have been replaced with the expandable rubber-type plugs and look to have been leaking pretty good. I'm not sure I can get at them to replace them with metal plugs, if I can't are these expandable rubber plugs a decent solution or do they typically leak? I think they're a cheap easy solution for something you're about to sell, if you want the buyer to have to do it right later. NEVER in my car.
'68 Fury Convertible '69 300 Convertible '15 Durango 5.7 Hemi '16 300 S Hemi
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Re: 73 W100 Drivetrain vibration
[Re: northcoastmopar]
#2891831
02/22/21 11:57 AM
02/22/21 11:57 AM
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Joined: Jan 2003
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NITROUSN
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The speedo cable was connected to the trans, not the TC. There is a cap on the TC now where a speedo cable would be connected. I don't know if my speedo cable has enough length to reach the TC.
Then you have the wrong cable. Not that it wont work. High range 1 to 1 it will be fine as long as you have the right gear for your axle ratio. Low range is another story. For now get the bugs out and the odds and ends you can do later.
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Re: 73 W100 Drivetrain vibration
[Re: NITROUSN]
#2891837
02/22/21 12:19 PM
02/22/21 12:19 PM
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basketcase
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you're this far into it...pull the engine and replace all the freeze plus, reseal regasket, freshen up the engine paint, etc.
Dave
1981 Dodge D150 360 auto
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Re: 73 W100 Drivetrain vibration
[Re: basketcase]
#2891992
02/22/21 08:36 PM
02/22/21 08:36 PM
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The motor mount bracket looks to me like someone put a 318 bracket on a 360. The plug wire is hiding the rear lug, but it looks to me that the bracket is tight against the ear on the block, and the washers are taking up space because the bolt was too long. The front of the bracket used washers to take up the space between the ear on the block and the bracket. I've seen that trick several times before, not that I would have ever done it. I'm in agreement with replacing all the freeze plugs. If two have already been replaced because they leaked, the others can't be far behind. Don't forget the two freeze plugs at the back of the block, between the block and the trans. Replace the crappy rubber junk with either steel or brass replacement plugs. New gaskets and a repaint isn't a bad idea either. Its pretty easy to spend someone else's money! Gene
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Re: 73 W100 Drivetrain vibration
[Re: basketcase]
#2892116
02/23/21 08:52 AM
02/23/21 08:52 AM
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northcoastmopar
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you're this far into it...pull the engine and replace all the freeze plus, reseal regasket, freshen up the engine paint, etc. Ugh...I've sold all of my hoists, engine stands, and tilters thinking I would never do this sort of thing again. Once you start peeling at layers of the onion.... Looks like Harbor Freight has a decent folding hoist.
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Re: 73 W100 Drivetrain vibration
[Re: northcoastmopar]
#2901249
03/21/21 07:06 AM
03/21/21 07:06 AM
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Looking at your last picture, it seems that your mounts are on the wrong side of the block ears.
Do you have truck manifolds (center dump) or car manifolds (rear ish dump)?
Last edited by ruderunner; 03/21/21 07:09 AM.
Angry white pureblood male
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Re: 73 W100 Drivetrain vibration
[Re: 440_Offroader]
#2901322
03/21/21 12:29 PM
03/21/21 12:29 PM
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northcoastmopar
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I have a 400 out of a truck on an engine stand. The picture of the left side looks correct. It will have a small cut out for the oil pump relief as well. The right side mount will mount on the front side of the ears. The RH mount also has a small offset towards the front. Do you have any pics of the mounts?
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Re: 73 W100 Drivetrain vibration
[Re: sportfury70]
#2901498
03/22/21 08:26 AM
03/22/21 08:26 AM
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Cleveland, Ohio
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Your mounts apoear to be on wrong side of mounting lugs and also look like 2wd mounts. Do they have a bend in them like the ones attached to the bare block? Nope, no bend. The ears on both mounts are straight.
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Re: 73 W100 Drivetrain vibration
[Re: northcoastmopar]
#2901836
03/22/21 11:17 PM
03/22/21 11:17 PM
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Joined: Dec 2012
Posts: 257 Alberta
440_Offroader
enthusiast
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enthusiast
Joined: Dec 2012
Posts: 257
Alberta
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Sorry, my computer was being a pain in the you know what, just shows up as black square nothing. Can't upload pics from my table, or my phone. Awesome. Anyways....
The Schumacher mounts look like they would work, but the right side mount has quite the offset. This may be so you mount it to the back side of the block ears. The left side mount, you can see the hole for the oil pump relief.
The FSM looks correct, as to mount on the back of the block ears.
Last edited by 440_Offroader; 03/22/21 11:49 PM.
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Re: 73 W100 Drivetrain vibration
[Re: 440_Offroader]
#2902384
03/24/21 01:50 PM
03/24/21 01:50 PM
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Joined: Jan 2003
Posts: 12,043 State of Confusion
hp383
Just a normal tag again
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Just a normal tag again
Joined: Jan 2003
Posts: 12,043
State of Confusion
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I have a big block short shaft 727 from a low mile motorhome. It is not the funny kind with the parking drum.
It might be good to go with a quick service, the RV only had 43K miles on it. And was in operable condition when the 440 was extracted. I however did not ever drive the RV so I cannot swear that the transmission was in perfect condition, but my neighbor (who bough the RV for the motor originally advertised as a 360, but he took it because he knew it wasn't and the price was right) is a Mopar guy, a friend, and has never given me reason to doubt his word.
If you are ever in Southwest Iowa, or have someone in the area that could pick it up, I would sell it for $100 which is below core price, since I cannot swear to the internals being operational, I cannot ship it though. After my truck wreck many years ago, I am no longer able to lift, move, palatalize, etc. any heavy objects.
I'm about 90 minutes South of Omaha Nebraska. Feel free to PM me if you could use this transmission. Hopefully this post is OK, its not actually a for sale, but more a trying to help a guy out posting.
Join the Penguin Liberation Front!! Stop the Hippo Occupation!
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Re: 73 W100 Drivetrain vibration
[Re: hp383]
#2902594
03/25/21 08:58 AM
03/25/21 08:58 AM
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Joined: Jan 2003
Posts: 4,366 Cleveland, Ohio
northcoastmopar
OP
master
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OP
master
Joined: Jan 2003
Posts: 4,366
Cleveland, Ohio
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I have a big block short shaft 727 from a low mile motorhome. It is not the funny kind with the parking drum.
It might be good to go with a quick service, the RV only had 43K miles on it. And was in operable condition when the 440 was extracted. I however did not ever drive the RV so I cannot swear that the transmission was in perfect condition, but my neighbor (who bough the RV for the motor originally advertised as a 360, but he took it because he knew it wasn't and the price was right) is a Mopar guy, a friend, and has never given me reason to doubt his word.
If you are ever in Southwest Iowa, or have someone in the area that could pick it up, I would sell it for $100 which is below core price, since I cannot swear to the internals being operational, I cannot ship it though. After my truck wreck many years ago, I am no longer able to lift, move, palatalize, etc. any heavy objects.
I'm about 90 minutes South of Omaha Nebraska. Feel free to PM me if you could use this transmission. Hopefully this post is OK, its not actually a for sale, but more a trying to help a guy out posting. Thanks but I had the trans rebuilt and had the correct tail housing put on it. I have the correct motor mounts coming from Bouchillon and will pull the motor this weekend. Also, having the cab fuel tank boiled and sealed. Was a rusty mess, another thing the previous owner lied to me about.
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Re: 73 W100 Drivetrain vibration
[Re: northcoastmopar]
#2902785
03/25/21 07:25 PM
03/25/21 07:25 PM
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Joined: Dec 2014
Posts: 5,777 ohio
ruderunner
master
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master
Joined: Dec 2014
Posts: 5,777
ohio
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who is doing the tank? Local?
Angry white pureblood male
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Re: 73 W100 Drivetrain vibration
[Re: 440_Offroader]
#2909085
04/11/21 02:33 PM
04/11/21 02:33 PM
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Joined: Dec 2014
Posts: 5,777 ohio
ruderunner
master
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master
Joined: Dec 2014
Posts: 5,777
ohio
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The Edelbrock carb will probably need an adapter to fit the intake. Does Edelbrock make a spread bore carb?
Angry white pureblood male
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Re: 73 W100 Drivetrain vibration
[Re: ruderunner]
#2909194
04/11/21 07:33 PM
04/11/21 07:33 PM
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Joined: Jan 2003
Posts: 10,538 Freeport IL USA
poorboy
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,538
Freeport IL USA
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That motor isn't too bad, at least you can still see the bottom row of head bolts. The intake ports are very oily, which would indicate to me the bottom of the intake gaskets were probably leaking. The oil on the outside is pretty standard big block stuff, especially the ones with the factory hipo exhaust manifolds they cook the cover gaskets. Buy the high temp valve cover gaskets, or you will get real good at changing those gaskets.
I think, were it me, I would see how much slop the timing chain & gears have. Pop the dist cap off, and rotate the motor in one direction for a short distance, then stop, mark the rotor position, and change the direction of rotation and see how many degrees of crank rotation you get before the rotor moves. There should be very little distance, if it seems like a lot, I'd pull it down and change the timing chain and gears. Those 2 bbl big blocks came with a plastic coated cam gear and time is usually not good to them, the miles don't seem to be a problem until the mileage gets near the 100,000 mile mark. Over time, the plastic gets hard and starts to break off and the timing gets sloppy and the plastic tends to plug up the oil pick up screen.
Intake gaskets, timing chain and gears, and the oil pump pickup screen are the things that most concern me about the old big blocks. The valve seals would be somewhere down the list, but those seals are a lot older then they were when I was playing with a big block. Gene
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Re: 73 W100 Drivetrain vibration
[Re: poorboy]
#2909222
04/11/21 08:40 PM
04/11/21 08:40 PM
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Joined: Jan 2011
Posts: 15,831 Central Florida
larrymopar360
Stud Muffin
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Stud Muffin
Joined: Jan 2011
Posts: 15,831
Central Florida
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I pulled 360 from my '79 W150 to get to those two rear freeze plugs, and did them all. It was either pull TC or pull engine. Did all freeze plugs, timing chain (dbl), intake gasket, valve covers, valve seals, water pump, and left every else alone. It ran well before but leaky. Mainly wanted to get those freeze plugs, did the other stuff while out.
Facts are stubborn things.
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Re: 73 W100 Drivetrain vibration
[Re: northcoastmopar]
#2909637
04/12/21 11:12 PM
04/12/21 11:12 PM
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Joined: Jan 2003
Posts: 10,538 Freeport IL USA
poorboy
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,538
Freeport IL USA
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ruderunner I'll need to get an adaptor plate for mounting square bore onto spread bore. I'll also need to figure out the kick down linkage. If you are around this coming weekend I'll run by and get those parts.
poorboy I planned to check the timing gear, I just may yank the water pump housing and timing cover and replace chain if needed. I'm replacing oil pan gasket so might as well do timing cover gasket.
I'm yanking all of the A/C stuff so I'll need to come up with some alternator and power steering brackets and maybe a crank pulley.
Also discovered that the front core plug on one of the heads seems to be filled with epoxy.....
That would be one way to stop the core plug from leaking.
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Re: 73 W100 Drivetrain vibration
[Re: northcoastmopar]
#2912414
04/20/21 04:32 PM
04/20/21 04:32 PM
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RWG75
Unregistered
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RWG75
Unregistered
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as long as yer this far: hi vol oil pump.
given the choice between epoxy and rubber, I'd go epoxy.
too late now but there's a guy in the ads section selling truck mounts - lots of pics of the different styles.
skip the adapter plate, scrounge up a TQ
a/c delete alternator brackets will be a fun hunt. try face book, lots of parts trucks there.
I generally use air to keep the valves shut when doing seals. Also a decent way to check if they're closing all the way / cracked. Last big block I did had enough carbon built up to keep a few of them part way open. Pulled them all and chucked them in a drill to clean em up.
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