Trans Or Rear End Noise
Thread Starter
Instructor
Joined: Nov 2005
Posts: 151
Likes: 0
From: Arcadia Ca
Trans Or Rear End Noise
I serviced the trans and diff in my 2001 C-5 M-6 and now the piece of crap whines like it is going to blow up. I can't tell if it is diff noise or trans, but I have now put all of the factory fluids in the trans and diff and Red Line synthetic stuff. I have changed the fluid in both units 3 times now, with different trick stuff and the noise is still there. I have no clue what it could be or how I could have caused it by simply servicing them. I have been racing and building my own race cars for over 20 years now and I think I am as smart as the next guy. I am totally lost on this deal. Can anyone help????? 
Instructor
Joined: Jan 2005
Posts: 102
Likes: 0
From: Oklahoma
Non-Drive Axle Noises
A few conditions can sound just like drive axle noise and have to be considered in pre-diagnosis.The 4 most common noises are exhaust, tires, Cv/universal joints and wheel trim rings.
In certain conditions, the pitch of the exhaust gases may sound like gear whine. At other times, it maybe mistaken for a wheel bearing rumble
Tires, especially radial and snow, can have a high-pitched tread whine or roar, similar to gear noise. Also, some non-standard tires with an unusual tread construction may emit a roar or whine.
Defective CV/universal joints may cause clicking noises or excessive driveline play that can be improperly diagnosed as drive axle problems.
Trims and moldings also can cause a whistling or whining noise.Ensure none of these components are causing the noise before disassembling the drive axle.
Gear Noise
A "howling" or "whining" noise from the ring and pinion gear can be caused by an improper gear pattern, gear damage, or improper bearing preload. It can occur at various speeds and driving conditions, or it can be continous.
Before disassembling axle to diagnose and correct gear noise, make sure that tires, exhaust, and vehicle trim have been checked as possible causes.
And on the rearend check the fluid for metal shavings and that goes for the transmission also
Hope this helps
A few conditions can sound just like drive axle noise and have to be considered in pre-diagnosis.The 4 most common noises are exhaust, tires, Cv/universal joints and wheel trim rings.
In certain conditions, the pitch of the exhaust gases may sound like gear whine. At other times, it maybe mistaken for a wheel bearing rumble
Tires, especially radial and snow, can have a high-pitched tread whine or roar, similar to gear noise. Also, some non-standard tires with an unusual tread construction may emit a roar or whine.
Defective CV/universal joints may cause clicking noises or excessive driveline play that can be improperly diagnosed as drive axle problems.
Trims and moldings also can cause a whistling or whining noise.Ensure none of these components are causing the noise before disassembling the drive axle.
Gear Noise
A "howling" or "whining" noise from the ring and pinion gear can be caused by an improper gear pattern, gear damage, or improper bearing preload. It can occur at various speeds and driving conditions, or it can be continous.
Before disassembling axle to diagnose and correct gear noise, make sure that tires, exhaust, and vehicle trim have been checked as possible causes.
And on the rearend check the fluid for metal shavings and that goes for the transmission also
Hope this helps
Thread Starter
Instructor
Joined: Nov 2005
Posts: 151
Likes: 0
From: Arcadia Ca
Originally Posted by Alfcarguy
Non-Drive Axle Noises
A few conditions can sound just like drive axle noise and have to be considered in pre-diagnosis.The 4 most common noises are exhaust, tires, Cv/universal joints and wheel trim rings.
In certain conditions, the pitch of the exhaust gases may sound like gear whine. At other times, it maybe mistaken for a wheel bearing rumble
Tires, especially radial and snow, can have a high-pitched tread whine or roar, similar to gear noise. Also, some non-standard tires with an unusual tread construction may emit a roar or whine.
Defective CV/universal joints may cause clicking noises or excessive driveline play that can be improperly diagnosed as drive axle problems.
Trims and moldings also can cause a whistling or whining noise.Ensure none of these components are causing the noise before disassembling the drive axle.
Gear Noise
A "howling" or "whining" noise from the ring and pinion gear can be caused by an improper gear pattern, gear damage, or improper bearing preload. It can occur at various speeds and driving conditions, or it can be continous.
Before disassembling axle to diagnose and correct gear noise, make sure that tires, exhaust, and vehicle trim have been checked as possible causes.
And on the rearend check the fluid for metal shavings and that goes for the transmission also
Hope this helps
A few conditions can sound just like drive axle noise and have to be considered in pre-diagnosis.The 4 most common noises are exhaust, tires, Cv/universal joints and wheel trim rings.
In certain conditions, the pitch of the exhaust gases may sound like gear whine. At other times, it maybe mistaken for a wheel bearing rumble
Tires, especially radial and snow, can have a high-pitched tread whine or roar, similar to gear noise. Also, some non-standard tires with an unusual tread construction may emit a roar or whine.
Defective CV/universal joints may cause clicking noises or excessive driveline play that can be improperly diagnosed as drive axle problems.
Trims and moldings also can cause a whistling or whining noise.Ensure none of these components are causing the noise before disassembling the drive axle.
Gear Noise
A "howling" or "whining" noise from the ring and pinion gear can be caused by an improper gear pattern, gear damage, or improper bearing preload. It can occur at various speeds and driving conditions, or it can be continous.
Before disassembling axle to diagnose and correct gear noise, make sure that tires, exhaust, and vehicle trim have been checked as possible causes.
And on the rearend check the fluid for metal shavings and that goes for the transmission also
Hope this helps
Drifting
Joined: Oct 2005
Posts: 1,943
Likes: 18
From: Henderson NV
I had the same noise after I just had my Diff taken out and totally resealed, they had to install more friction modifier and the whinning noise went away, Reason was, They did too good of a job cleaning it, and stripped all old lubricants out, no problems since.
Race Director
Joined: Mar 2001
Posts: 10,030
Likes: 10
From: Prescott AZ
St. Jude Donor '04
Originally Posted by Pizzano
I had the same noise after I just had my Diff taken out and totally resealed, they had to install more friction modifier and the whinning noise went away, Reason was, They did too good of a job cleaning it, and stripped all old lubricants out, no problems since.
Racer
Joined: Aug 2005
Posts: 251
Likes: 32
From: S/W Illinois
If this happened immediately after the change, it doesn't seem likely that a wheel bearing would fail exactly at that time. Are you absolutely sure you put the correct fluids in and in the correct amount? What was in there before? If you installed the right stuff in the right amount, I like the theory of more additive being needed. My 6 speed took about 4 quarts of ATF and the rear axle took a little less than 2 quarts of 90w. Let us know how it goes. Good luck!
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Le Mans Master
Joined: Nov 2002
Posts: 7,179
Likes: 2
From: Charlotte, NC
Originally Posted by David426
Did you use the friction modifier? If you did not,thats the problem
If you didn't I would add it or service it again. Worth a shot, it is required...
-=Rick
