Drivetrain noises
Thread Starter
Registered User
Joined: Oct 2011
Posts: 261
From: Pennsylvannia
Drivetrain noises
My drivetrain makes a horrible noise when driving forward. There are no noises in reverse. I thought for a while the sound was the differential or wheel bearing.
Today I lifted the rear wheels off the ground and attempted to spin the wheels (neutral, no parking brake). I had to exert a massive amount of energy to even budge the tires, and a horrible noise results from when the driveshaft connects to the transmission (A4).
Here is a video I took of the noise:
Drivetrain noises 1997 Camaro Z28 - YouTube
Any ideas? Should the tires be hard to spin in neutral and off the ground?
Today I lifted the rear wheels off the ground and attempted to spin the wheels (neutral, no parking brake). I had to exert a massive amount of energy to even budge the tires, and a horrible noise results from when the driveshaft connects to the transmission (A4).
Here is a video I took of the noise:
Drivetrain noises 1997 Camaro Z28 - YouTube
Any ideas? Should the tires be hard to spin in neutral and off the ground?
Administrator
Joined: Nov 1998
Posts: 71,098
From: Hell was full so they sent me to NJ
Re: Drivetrain noises
Are you able to "rattle" the front yoke slider that goes over the trans output shaft? If so, that would indicate a worn bearing on the output shaft, or a damaged slider.
Registered User
Joined: Mar 2002
Posts: 99
From: Aridzona
Re: Drivetrain noises
it's quick and easy to pull the driveshaft.
If the u-joints are crunchy when you pivot them, replace them.
Also, use that time to spin the rear differential to listen for noise or irregular drag, and to see if the pinion yoke has any lateral motion.
top off the trans. when done.
If the u-joints are crunchy when you pivot them, replace them.
Also, use that time to spin the rear differential to listen for noise or irregular drag, and to see if the pinion yoke has any lateral motion.
top off the trans. when done.
Registered User
Joined: Mar 2002
Posts: 99
From: Aridzona
Re: Drivetrain noises
Sure.
If you were to prepare for the worst case scenario,
Get a new retaining bolt for the differential crossbar (see below)
A retaining bolt removal kit (the bolt commonly breaks)
A basic magnet tool which will help you pull the c-clips from the axles
Slide hammer tool (rentable) to pull the old bearings out
Access to a good set of used axles (the bearings use the axle as the inner bearing race and probably have ground it down)
2 New bearings to go with good stock axles or 2 offset axle-saver bearing to use with your ground down originals
2 seals
New 80/90 and GM posi additive
1 Cover gasket
The usual tools to pull the rear calipers
A buddy and I last did a set on an 8.8. Mustang. Not much different than the GM axle, we used the offset axle-saver bearings.
Worst case scenario, you're in for over $300 including new axles.
With used parts, possible use of axle-saver bearings, you're in for < $100.
If you were to prepare for the worst case scenario,
Get a new retaining bolt for the differential crossbar (see below)
A retaining bolt removal kit (the bolt commonly breaks)
A basic magnet tool which will help you pull the c-clips from the axles
Slide hammer tool (rentable) to pull the old bearings out
Access to a good set of used axles (the bearings use the axle as the inner bearing race and probably have ground it down)
2 New bearings to go with good stock axles or 2 offset axle-saver bearing to use with your ground down originals
2 seals
New 80/90 and GM posi additive
1 Cover gasket
The usual tools to pull the rear calipers
A buddy and I last did a set on an 8.8. Mustang. Not much different than the GM axle, we used the offset axle-saver bearings.
Worst case scenario, you're in for over $300 including new axles.
With used parts, possible use of axle-saver bearings, you're in for < $100.
Registered User
Joined: Mar 2002
Posts: 99
From: Aridzona
Re: Drivetrain noises
Call it a crosspin shaft.
The retaining bolt is the very first thing he pops out:
http://tinyurl.com/7n5qr24
Yours isn't notched.
http://tinyurl.com/7n5qr24
Yours isn't notched.
Last edited by jmd; Jul 1, 2012 at 12:40 AM.
Thread Starter
Registered User
Joined: Oct 2011
Posts: 261
From: Pennsylvannia
Originally Posted by jmd
Sure.
If you were to prepare for the worst case scenario,
Get a new retaining bolt for the differential crossbar (see below)
A retaining bolt removal kit (the bolt commonly breaks)
A basic magnet tool which will help you pull the c-clips from the axles
Slide hammer tool (rentable) to pull the old bearings out
Access to a good set of used axles (the bearings use the axle as the inner bearing race and probably have ground it down)
2 New bearings to go with good stock axles or 2 offset axle-saver bearing to use with your ground down originals
2 seals
New 80/90 and GM posi additive
1 Cover gasket
The usual tools to pull the rear calipers
A buddy and I last did a set on an 8.8. Mustang. Not much different than the GM axle, we used the offset axle-saver bearings.
Worst case scenario, you're in for over $300 including new axles.
With used parts, possible use of axle-saver bearings, you're in for < $100.
If you were to prepare for the worst case scenario,
Get a new retaining bolt for the differential crossbar (see below)
A retaining bolt removal kit (the bolt commonly breaks)
A basic magnet tool which will help you pull the c-clips from the axles
Slide hammer tool (rentable) to pull the old bearings out
Access to a good set of used axles (the bearings use the axle as the inner bearing race and probably have ground it down)
2 New bearings to go with good stock axles or 2 offset axle-saver bearing to use with your ground down originals
2 seals
New 80/90 and GM posi additive
1 Cover gasket
The usual tools to pull the rear calipers
A buddy and I last did a set on an 8.8. Mustang. Not much different than the GM axle, we used the offset axle-saver bearings.
Worst case scenario, you're in for over $300 including new axles.
With used parts, possible use of axle-saver bearings, you're in for < $100.
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