Project "Fix that damn 5th/6th gear high speed vibration".
03-02-2012, 02:58 PM
#21
I replaced the driveshaft, and was hoping that was the fix, but like I said, I haven't been able to find out.
Now I'm pretty sure I'm going to be disappointed.
The following users liked this post:
Bengtson95 (04-20-2021)
03-02-2012, 07:44 PM
#22
It has been 100% vibe free for over a year now and I am 100% confident the root problem was a shitty design specific to the 5/6 driven cluster gear and the way it press fits on the main shaft.
Jason at TDP sold me the repaired main shaft for a very reasnable cost which has a tad more "build" in the problem area which will make for a tighter fit. I also purchased a brand new 5/6 gear and did a typical rebuild including new blocker rings and a new 1/2 syncro. Could not be more happy with the way its now working.
Lastly if you take your tranny apart and you can remove the 5/6 cluster gear by hand, you will have found the source of the 80MPH vibe assuminig everything else has been ruled out.
Jason at TDP sold me the repaired main shaft for a very reasnable cost which has a tad more "build" in the problem area which will make for a tighter fit. I also purchased a brand new 5/6 gear and did a typical rebuild including new blocker rings and a new 1/2 syncro. Could not be more happy with the way its now working.
Lastly if you take your tranny apart and you can remove the 5/6 cluster gear by hand, you will have found the source of the 80MPH vibe assuminig everything else has been ruled out.
03-12-2012, 09:29 AM
#23
TECH Enthusiast
iTrader: (1)
Join Date: Apr 2005
Location: Colorado
Posts: 639
Likes: 0
Received 0 Likes
on
0 Posts
wow i was just about to post a question about this...i have the same exact thing going on!!!!! Is the lt1 driveshaft a POS? does it balance at speeds? I guess ive had this problem so long ive always just assumed it was the drive shaft
03-12-2012, 10:30 AM
#25
TECH Apprentice
iTrader: (20)
Join Date: Dec 2008
Location: KCMO
Posts: 338
Likes: 0
Received 0 Likes
on
0 Posts
So what are the risks of driving with the vibration present? Obviously a lot of cars have it, yet, no one has chimed in and said their t-56 grenaded on them... Mine is annoying, but if it could be prolonged to next winter, that would be optimal.
Is an LS1 f-body drive shaft a direct fit on the LT cars?
Is an LS1 f-body drive shaft a direct fit on the LT cars?
03-12-2012, 10:35 AM
#26
TECH Enthusiast
iTrader: (1)
Join Date: Apr 2005
Location: Colorado
Posts: 639
Likes: 0
Received 0 Likes
on
0 Posts
So what are the risks of driving with the vibration present? Obviously a lot of cars have it, yet, no one has chimed in and said their t-56 grenaded on them... Mine is annoying, but if it could be prolonged to next winter, that would be optimal.
Is an LS1 f-body drive shaft a direct fit on the LT cars?
Is an LS1 f-body drive shaft a direct fit on the LT cars?
05-21-2012, 11:50 AM
#27
So what are the risks of driving with the vibration present? Obviously a lot of cars have it, yet, no one has chimed in and said their t-56 grenaded on them... Mine is annoying, but if it could be prolonged to next winter, that would be optimal.
Is an LS1 f-body drive shaft a direct fit on the LT cars?
Is an LS1 f-body drive shaft a direct fit on the LT cars?
If you drive around with a worn out 5/6 cluster gear like what I have spoken to in this thread, eventually the drive splines on that gear are gonna let go and your not gonna have 5th or 6th gears. The splines on mine were about 50% gone.
