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#906654 - 02/06/11 06:22 PM Re: Bad driveline vibration after manual trans install [Re: 440challenger]
RapidRobert Offline
Circle Track

Registered: 11/20/03
Posts: 33001
Loc: Lincoln Nebraska
I feel your pain. You know I'm not a stick guy (904 afficionado) but if it's not an angle prob I'd bet my next to last buck on the trans but I'd put it up on stands & have some run it up & you see if you can spot anything not kosher
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#906655 - 02/06/11 06:25 PM Re: Bad driveline vibration after manual trans install [Re: DoctorDiff]
440challenger Offline
master

Registered: 02/21/03
Posts: 4503
Loc: NJ
I used a bronze? bushing from the help section for my application. I messed the first one up pretty bad putting it in,because i was not aware that even though the cranks are drilled,they are not finished ready to accept a bushing. So i used a sand roll on a dremel and grinded the inside of the hole to fit the new bushing. I then hammered the new bushing in (was still a bit tight and i did mess it up a little bit) But i then took the sand roll again and cleaned up the inside of the bushing so that my clutch alignment tool fit in easily but not sloppy.

The trans went in very easily also.


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#906656 - 02/06/11 06:38 PM Re: Bad driveline vibration after manual trans install [Re: 440challenger]
RapidRobert Offline
Circle Track

Registered: 11/20/03
Posts: 33001
Loc: Lincoln Nebraska
I think I'd put it up on 4 stands w a large shop hyd floor jack under the 3rd member just touching it for safety & have someone work the throttle & you underneath on the side. I'd think w that amt of vibration that something might be (hopefully) apparent
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#906657 - 02/06/11 06:43 PM Re: Bad driveline vibration after manual trans install [Re: 440challenger]
DoctorDiff Offline
master

Registered: 01/20/03
Posts: 7803
Loc: Polson, MT
The "drilled hole" is undersized and it is not in the center of the crank. Hand clearancing the bushing exaggerates the problem. Don't ask me how I know this.

I would install a late model pilot bearing that fits in the torque converter hub. You should also correct the bellhousing runout. At least make sure all alignment dowels are engaged.
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#906658 - 02/06/11 07:08 PM Re: Bad driveline vibration after manual trans install [Re: DoctorDiff]
440challenger Offline
master

Registered: 02/21/03
Posts: 4503
Loc: NJ
Ok i will try the different sytle bearing. Now as far as aligning the bell. I dont understand this. I see they sell offset bushings,but how would you move the bell,beings the mounting holes are not slotted ? Say you put an offset dowel in,wouldnt the bell botls not line up to the block ?

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#906659 - 02/06/11 07:16 PM Re: Bad driveline vibration after manual trans install [Re: 440challenger]
DoctorDiff Offline
master

Registered: 01/20/03
Posts: 7803
Loc: Polson, MT
The bolt holes in the bellhousing are oversized. If you need to go farther, you can always drill them out.

The procedure is outlined in Moparts tech archive:

http://www.moparts.org/Tech/Archive/clutch/16.html

I think RobbMC makes an easy to install offset dowel kit.
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#906660 - 02/06/11 07:19 PM Re: Bad driveline vibration after manual trans install [Re: 440challenger]
Yancy Derringer Offline
mopar

Registered: 10/20/10
Posts: 606
Loc: Montana
OK, look. FORGET bell/ clutch/ pilot alignment FOR NOW. If any of that was screwed up, it would be hard to shift, or hard to get into gear, etc

I think you either have a yoke/ ujoint or a balance problem.

Check carefully the play between the yoke/ bushing.

Check that the yoke is not bottommed

Pull the shaft and TAKE THE U JOINTS apart and inspect, re-grease, and re-install HAVE THE SHAFT BALANCED

Check your pinion for play in the bearings, or loose on the shaft.

Just for drill, try a different set of (borrowed) tires, or at least the rear pair.

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#906661 - 02/07/11 09:30 AM Re: Bad driveline vibration after manual trans install [Re: 440challenger]
dan9 Offline
super stock

Registered: 12/30/09
Posts: 973
Loc: pa.
Did you install the inner c clips on the rear u-joint? I had overlooked that on my rr and found the driveshaft wasn't centered.

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#906662 - 03/14/11 07:33 AM Re: Bad driveline vibration after manual trans install [Re: dan9]
440challenger Offline
master

Registered: 02/21/03
Posts: 4503
Loc: NJ
So i took the trans out to fix 2ndgear. 2nd gear sync was cracked in half. I put all new syncros in, and both main shaft bearings. I also replaced the rear tailshaft bushing which was thought to maybe be the problem causing the vibration. It was still good. I put it all together and actually found a driveshaft about
1 1/4 shorter. Took it for a ride and no vibration! Must of been that driveshaft bottomed on the yoke!!

Everything is good now,except ! I have a slight woodpecker sounding noise coming from the trans It shifts great and does everything perfect besides the noise. I ran straight atf,im thinking of putting gear oil in it to see if it quiets down

It goes away if the push the clutch in.


Edited by 440challenger (03/14/11 07:34 AM)

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#906663 - 03/14/11 11:57 AM Re: Bad driveline vibration after manual trans install [Re: 440challenger]
DAYCLONA Offline
I Live Here

Registered: 12/10/07
Posts: 15205
Loc: Mass
Quote:

I put it all together and actually found a driveshaft about
1 1/4 shorter. Took it for a ride and no vibration! Must of been that driveshaft bottomed on the yoke!!








I think I said that back in January ....Glad you squared away your issues with that 4 spd,....now if you want to keep it together, GET THAT ATF OUT OF THAT CASE!,...use a GL5 90 weight oil only, that ATF will only shorten the life of that 4spd,...real quick

Mike

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