About the front seal.
Thread Starter
Intermediate
Joined: Mar 2009
Posts: 30
Likes: 0
From: Brownsville Texas
About the front seal.
I'm having this problem with my 1994 corvette. This is gonna be the second time I replace the front seal to my corvette in less then 4 months. What's going on? I also have a bad shake when i'm at 80 and sometimes does it at 65 or so. My suspicion was the drive shaft being off balance. Please help?
P.S. I've ruled out the tires, rims, rotors and brakes. I put new shocks as well. Also replaced u joints.
P.S. I've ruled out the tires, rims, rotors and brakes. I put new shocks as well. Also replaced u joints.
Former Vendor
Joined: Nov 2006
Posts: 2,482
Likes: 3
From: Carmichael ca
On the front seal, I'd check the surface of the balancer that the seal seals. Sometimes a groove can wear in it.
On the driveshaft, you'll need to find a machine shop does driveshafts. They can check the balance for you.
On the driveshaft, you'll need to find a machine shop does driveshafts. They can check the balance for you.
Race Director
Joined: Feb 2004
Posts: 12,518
Likes: 19
Click the link below.
http://forums.corvetteforum.com/c4-t...haft-help.html
Your problem is simple:
Bad converter
Bad pump or pump bushing
Excessive end play in the crank
The above will cause a front seal leak.
Improper installation or defective seal are remote possibilities. If so, it would have leaked from day 1.
http://forums.corvetteforum.com/c4-t...haft-help.html
Your problem is simple:
Bad converter
Bad pump or pump bushing
Excessive end play in the crank
The above will cause a front seal leak.
Improper installation or defective seal are remote possibilities. If so, it would have leaked from day 1.
Last edited by Pete K; May 17, 2010 at 03:27 PM.
Race Director
Joined: Feb 2004
Posts: 12,518
Likes: 19
Is your vibration occurring at 80 MPH only, or at the same rpm that 80mph represents? In other words, if you rev the motor to 24-2800 or so rpm, does it vibrate sitting still?
If so, it could be your harmonic balancer or torque converter.
If it does vibrate sitting still at the same rpm as 80 mph, disconnect the torque converter from the flexplate, and carefull push it back a bit from the flexplate. Start the engine and try again. If vibe is gone, your converter is junk. If the vibe stays, you have a bad balancer.
Although unlikely, if the crankshaft has a ton of endplay, it will also cause the problems you describe.
If so, it could be your harmonic balancer or torque converter.
If it does vibrate sitting still at the same rpm as 80 mph, disconnect the torque converter from the flexplate, and carefull push it back a bit from the flexplate. Start the engine and try again. If vibe is gone, your converter is junk. If the vibe stays, you have a bad balancer.
Although unlikely, if the crankshaft has a ton of endplay, it will also cause the problems you describe.
