Need to replace TT bearings auto 85. Dont want to remove tranny. Is it possible?
11-30-2017, 12:57 PM
#1
Racer
Thread Starter
Need to replace TT bearings auto 85. Dont want to remove tranny. Is it possible?
I bought a 85 and there's a bad vibration in neutral while revving the engine I believe the TT bearings are shot. I checked the front flex plate and crank end play all seems well.Upon inspecting the front bearing it's moved down the TT 14 inches and looks bad. I want to do this job but I don't want to drop the trans. I saw Dwayne's write up but I don't want to go through all that. I've searched and could not find a thread on how to r&r the TT without dropping the trans. Any help would be appreciated. Maybe Dwayne can come out to ny and help!
11-30-2017, 01:19 PM
#2
If you can find a way of doing it w/o removing the rear cross member and trans, you will be known forever as a God in this forum.
11-30-2017, 01:23 PM
#3
Team Owner
Well... what Sean said...
the big thing to remember is that you need to remove both of the pinch bolts before you drop the assembly down,
And that the TT and transaxle are best taken apart on the ground so that you dont bend the input shaft or the tail end of the drive shaft,
either one will leave a permanent vibration in the drive line
the big thing to remember is that you need to remove both of the pinch bolts before you drop the assembly down,
And that the TT and transaxle are best taken apart on the ground so that you dont bend the input shaft or the tail end of the drive shaft,
either one will leave a permanent vibration in the drive line
11-30-2017, 01:28 PM
#4
Chronic Tool Dropper
Lifetime Rennlist
Member
Lifetime Rennlist
Member
A decade or so ago, a user reported that he had levered the transmission back a ways, then sawed a slot in the back of the bellhousing so he could drop the TT without completely removing the trans. Your other option might be to pull the engine and take the TT out forwards
In my limited experience, the trans needs to come out. There just isn't enough room to get the transmission far enough back to let the driveshaft come out of the bellhousing with the transmission still up in the tub.
In my limited experience, the trans needs to come out. There just isn't enough room to get the transmission far enough back to let the driveshaft come out of the bellhousing with the transmission still up in the tub.
11-30-2017, 01:37 PM
#5
Vegas, Baby!
Rennlist Member
Rennlist Member
No how, no way! Got to drop the suspension, and then the trans. I have a lift, and a 3 stage transmission Jack, copied the support plate from the WSM. I didn't have to remove the torque tube. Lot of people here have done this job, with the car on jack stands. I can't imagine doing it that way!
No matter how you look at it, it's a big job. Dean Fuller posted a Video, of the process, and it's very detailed. I followed Dean's instructions to the letter, and it all went well, no problems.
I was able to support the torque tube with a block of wood, and my tranny jack adjusts side to side and tilts. Very easy to slide the trans off the drive shaft. I swapped transmissions. Used new bolts in the front and rear couplers.
Roger has everything you'll need in stock.
No matter how you look at it, it's a big job. Dean Fuller posted a Video, of the process, and it's very detailed. I followed Dean's instructions to the letter, and it all went well, no problems.
I was able to support the torque tube with a block of wood, and my tranny jack adjusts side to side and tilts. Very easy to slide the trans off the drive shaft. I swapped transmissions. Used new bolts in the front and rear couplers.
Roger has everything you'll need in stock.
Last edited by polecat702; 11-30-2017 at 01:52 PM.
11-30-2017, 01:44 PM
#6
You can hack your way out with out removing the transmission but the issue is you need to do the torque converter seal, carrier bearings at the torque converter also. You do not want to do this job twice.
11-30-2017, 02:24 PM
#7
Racer
Thread Starter
No how, no way! Got to drop the suspension, and then the trans. I have a lift, and a 3 stage transmission Jack, copied the support plate from the WSM. I didn't have to remove the torque tube. Lot of people here have done this job, with the car on jack stands. I can't imagine doing it that way!
No matter how you look at it, it's a big job. Dean Fuller posted a Video, of the process, and it's very detailed. I followed Dean's instructions to the letter, and it all went well, no problems.
I was able to support the torque tube with a block of wood, and my tranny jack adjusts side to side and tilts. Very easy to slide the trans off the drive shaft. I swapped transmissions. Used new bolts in the front and rear couplers.
Roger has everything you'll need in stock.
No matter how you look at it, it's a big job. Dean Fuller posted a Video, of the process, and it's very detailed. I followed Dean's instructions to the letter, and it all went well, no problems.
I was able to support the torque tube with a block of wood, and my tranny jack adjusts side to side and tilts. Very easy to slide the trans off the drive shaft. I swapped transmissions. Used new bolts in the front and rear couplers.
Roger has everything you'll need in stock.
Never mind found it thanks
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11-30-2017, 02:33 PM
#8
Rennlist Member
Yes, you can remove the torque tube with the trans in the car. I've done it twice. a few years ago I had TC housing bearing failure when coming back from third coast. We dropped the TT and Trans at that time. I replaced the TC housing bearings and resealed the Trans pump while I was there. With lots of help and facilities from the local 928 crew.
Subsequently shortly after reinstall I was getting bearing noise again. I assumed the TT bearings had taken damage due to the failed TC bearing.
This time I dropped only the TT. to do this you will need to unbolt the trans mounts from the cross member and slide the trans back about an inch. and you will need to remove the front bell housing. I found this easier than the full trans drop for this second removal as I was at home on jack stand and doing the job by myself. I replaced the TT bearings and reinstalled the TT.
Upon start up the bearing noise was still there (determined to be a bad replacement bearing in the TC which I had installed at the first trans drop). So again I dropped just the TT, then I removed the TC housing from the trans with the trans still in the car and replaced the TC housing bearings a second time. Been running great ever since.
So the moral of the story is that it can be done, and given the motivation you could do the TC housing and pump seal work with the trans in the car. If I were just doing the TT and TC bearings I think this is a viable option. if you plan to reseal the trans while you do bearings, it is probably more convenient to just drop the whole thing and work the trans in a more comfortable position.
Subsequently shortly after reinstall I was getting bearing noise again. I assumed the TT bearings had taken damage due to the failed TC bearing.
This time I dropped only the TT. to do this you will need to unbolt the trans mounts from the cross member and slide the trans back about an inch. and you will need to remove the front bell housing. I found this easier than the full trans drop for this second removal as I was at home on jack stand and doing the job by myself. I replaced the TT bearings and reinstalled the TT.
Upon start up the bearing noise was still there (determined to be a bad replacement bearing in the TC which I had installed at the first trans drop). So again I dropped just the TT, then I removed the TC housing from the trans with the trans still in the car and replaced the TC housing bearings a second time. Been running great ever since.
So the moral of the story is that it can be done, and given the motivation you could do the TC housing and pump seal work with the trans in the car. If I were just doing the TT and TC bearings I think this is a viable option. if you plan to reseal the trans while you do bearings, it is probably more convenient to just drop the whole thing and work the trans in a more comfortable position.
11-30-2017, 04:54 PM
#10
Racer
Thread Starter
Yes, you can remove the torque tube with the trans in the car. I've done it twice. a few years ago I had TC housing bearing failure when coming back from third coast. We dropped the TT and Trans at that time. I replaced the TC housing bearings and resealed the Trans pump while I was there. With lots of help and facilities from the local 928 crew.
Subsequently shortly after reinstall I was getting bearing noise again. I assumed the TT bearings had taken damage due to the failed TC bearing.
This time I dropped only the TT. to do this you will need to unbolt the trans mounts from the cross member and slide the trans back about an inch. and you will need to remove the front bell housing. I found this easier than the full trans drop for this second removal as I was at home on jack stand and doing the job by myself. I replaced the TT bearings and reinstalled the TT.
Upon start up the bearing noise was still there (determined to be a bad replacement bearing in the TC which I had installed at the first trans drop). So again I dropped just the TT, then I removed the TC housing from the trans with the trans still in the car and replaced the TC housing bearings a second time. Been running great ever since.
So the moral of the story is that it can be done, and given the motivation you could do the TC housing and pump seal work with the trans in the car. If I were just doing the TT and TC bearings I think this is a viable option. if you plan to reseal the trans while you do bearings, it is probably more convenient to just drop the whole thing and work the trans in a more comfortable position.
Subsequently shortly after reinstall I was getting bearing noise again. I assumed the TT bearings had taken damage due to the failed TC bearing.
This time I dropped only the TT. to do this you will need to unbolt the trans mounts from the cross member and slide the trans back about an inch. and you will need to remove the front bell housing. I found this easier than the full trans drop for this second removal as I was at home on jack stand and doing the job by myself. I replaced the TT bearings and reinstalled the TT.
Upon start up the bearing noise was still there (determined to be a bad replacement bearing in the TC which I had installed at the first trans drop). So again I dropped just the TT, then I removed the TC housing from the trans with the trans still in the car and replaced the TC housing bearings a second time. Been running great ever since.
So the moral of the story is that it can be done, and given the motivation you could do the TC housing and pump seal work with the trans in the car. If I were just doing the TT and TC bearings I think this is a viable option. if you plan to reseal the trans while you do bearings, it is probably more convenient to just drop the whole thing and work the trans in a more comfortable position.
11-30-2017, 05:05 PM
#11
Team Owner
FWIW its easy to drop the rear suspension,
tie the calipers up,
remove the E brake cable ,
and sway bar link bolts ,
remove the 6 shock tower bolts the 4 chassis to cross member side bolts,
the 2 cross to chassis bolts,
then the 2 eccentric adjuster bolts.
support the trans on the swaybar lower the rear subframe down
11-30-2017, 05:07 PM
#12
928 Engine Re-Re-Rebuild Specialist
Rennlist Member
Rennlist Member
11-30-2017, 05:12 PM
#13
Rennlist Member
Yeah, Doing it over the winter months. Going the long, but sure way. I don't want to do ant accidental damage (You never know what it will cost in time and money). Wont be driving it till spring anyway. Good luck with the shortcuts.
11-30-2017, 05:32 PM
#14
Racer
Thread Starter
My engine needs timing belt replacement with all the other stuff. My oil pan is leaking motor mounts need replacing so I may pull the engine and address the TT at that time.
11-30-2017, 05:46 PM
#15
Rennlist Member
^^^ That's what real men do.
