4l60e possible vibration issue
4l60e possible vibration issue So since I've installed my Strange S60 and new drive shaft from them over the winter I've been chasing a really bad vibration at speeds above 50-55 mph. The faster you go the worse it gets and you can actually here it. It's worse when you decelerate and almost subsides when back on the throttle but not 100% gone. I"ve played with pinion angle to no end but nothing has changed it. This morning I pulled the driveshaft out of the car to send it back to Strange just verify that the balance is correct. While it's out im going to replace the taillshaft bushing and seals. So here is my question, when the driveshaft yoke is installed into the rear of the transmission there is a tiny bit of play up and down and side to side. If you put enough pressure on the yoke you can almost push the yoke shaft away from the taillshaft seal, but just barely. With the driveshaft out of the transmission, the transmission tailshaft has a **** ton of up/down and side to side play. I can almostpush the shaft by hand inti the seal.Is this a normal amount of play with the shaft out? I'm just wondering if this normal because the once the yoke is in the housing the bushing keeps it from moving around? Thanks for any insight and replies!
Moderator
Joined: Aug 2010
Posts: 7,323
Likes: 529
From: Ann Arbor, MI
CORRECTION/UPDATE - See below
I mostly only have experience with the nearly-new 4L60E that I build (and rebuild over and over again to experiment with parts), but these have very little side-to-side play at the end of the tailshaft.
As much side-to-side play as you described IMHO indicates excessive wear in the bushings.
We had a similar question a year ago and IIRC, Frank at Performabuilt said that 1/4" play was OK, but it should not be too much more than that. Certainly not the 1" you describe.
Perhaps one of the pro builders can confirm whether this is causing your vibration.
I mostly only have experience with the nearly-new 4L60E that I build (and rebuild over and over again to experiment with parts), but these have very little side-to-side play at the end of the tailshaft.
As much side-to-side play as you described IMHO indicates excessive wear in the bushings.
We had a similar question a year ago and IIRC, Frank at Performabuilt said that 1/4" play was OK, but it should not be too much more than that. Certainly not the 1" you describe.
Perhaps one of the pro builders can confirm whether this is causing your vibration.
Last edited by mrvedit; Jun 17, 2014 at 05:45 PM. Reason: Correction
I would certainly check at least the tail housing bushing as its pretty easy .
__________________
Moderator
Joined: Aug 2010
Posts: 7,323
Likes: 529
From: Ann Arbor, MI
Correction/Update
I had a chance to check one of my spare, like-new, 4L60E and I noticed it has moderate side-to-side play in the tail shaft. With some force, I could push the tailshaft to the tailshaft seal. I estimate you can only move it 1/4" before it touches the seal.
IIRC from a thread a year ago, the OP removed the tailshaft housing and had well over an inch of side-to-side play, maybe even 2 inches. That is clearly too much.
I had a chance to check one of my spare, like-new, 4L60E and I noticed it has moderate side-to-side play in the tail shaft. With some force, I could push the tailshaft to the tailshaft seal. I estimate you can only move it 1/4" before it touches the seal.
IIRC from a thread a year ago, the OP removed the tailshaft housing and had well over an inch of side-to-side play, maybe even 2 inches. That is clearly too much.
Trending Topics
Correction/Update I had a chance to check one of my spare, like-new, 4L60E and I noticed it has moderate side-to-side play in the tail shaft. With some force, I could push the tailshaft to the tailshaft seal. I estimate you can only move it 1/4" before it touches the seal. IIRC from a thread a year ago, the OP removed the tailshaft housing and had well over an inch of side-to-side play, maybe even 2 inches. That is clearly too much.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo Yes the case output shaft bushing provides very little support other than a guide for the rear planet assembly. I can however tell you this if its totally missing it will cause a decent vibration. Ask how I know this well years ago I had a guy come in he had had his new trans am to the dealer multiple times and a few trans shops who had replaced drive shaft. joint's, tail housing and Bushing mounts and more he had a whole list of things. I removed the tail housing and looked with a flash light and low and behold no case bushing at all. Never been one installed. We removed the reluctor gear and with a bit of improve of a steel pipe installed a bushing, Put all back together and wahla no vibration.
__________________
Yes the case output shaft bushing provides very little support other than a guide for the rear planet assembly. I can however tell you this if its totally missing it will cause a decent vibration. Ask how I know this well years ago I had a guy come in he had had his new trans am to the dealer multiple times and a few trans shops who had replaced drive shaft. joint's, tail housing and Bushing mounts and more he had a whole list of things. I removed the tail housing and looked with a flash light and low and behold no case bushing at all. Never been one installed. We removed the reluctor gear and with a bit of improve of a steel pipe installed a bushing, Put all back together and wahla no vibration.
