: Diff whine from 30-50mph, cause? Solutions?



R4a2m0o
05-09-10, 06:39 PM
Only when accel or cruise, not on decel, the diff has a subtle whine until I get to about 50 then it disappears. Any idea on how to get rid of that?

Oleksakjr
05-09-10, 07:38 PM
I have the exact same thing, I heard the only way to get rid of it is break it... and pinion braces dont help...

AG'S-V
05-09-10, 09:48 PM
Break, replace and be happy

rand49er
05-09-10, 10:46 PM
Cadillac ownership shows "none."

:confused:

R4a2m0o
05-10-10, 04:30 AM
So if I got a new diff it wouldn't do this?

PISNUOFF
05-10-10, 09:01 AM
Not necessarily. Mine has done that from day 1 and has never broken. It is cause by the backlash between the ring and pinion. If it's only a slight whine and you can barely hear it, you can put some thicker diff fluid in there and it'll quiet up some. I run 90w110 and it's slightly quieter.

CadiBlk
05-10-10, 09:13 AM
I bet just searching, "diff whine" would removed 90% of the whine. Out of me at least.

liqidvenom
05-10-10, 11:28 AM
my new one did this since day one. it might be more heard now with the pinon brace.

smokisnshellz
05-10-10, 05:48 PM
Break it. Broke mine, sent me into a wall and almost killed me. But im getting a new one. Thanks Carmax warranty!(thieves)

Autom8r
05-10-10, 07:26 PM
Mine had the problem 4 years ago while under warranty as well as a severe trannny vibration in 6th cog. GM replaced both diff and trans under warranty, claims it cost them over 8 grand. Mine still has a slight whine which I feel is normal. The volume knob on the radio fixes it.

Dave

repenttokyo
05-10-10, 08:31 PM
Mine had the problem 4 years ago while under warranty as well as a severe trannny vibration in 6th cog. GM replaced both diff and trans under warranty, claims it cost them over 8 grand. Mine still has a slight whine which I feel is normal. The volume knob on the radio fixes it.

Dave

or a nice set of mufflers :)

Autom8r
05-10-10, 10:23 PM
Got a Corsa exhaust too, but it only sounds off when I shower down on it.... AT 30-50 MPH the whine overpowers the Corsa....