Rearend Noises

[SnakeByte]

Hi guy's, I have an 07 Mustang GT. I have been having a problem getting my rearend to ride right. The rear was riding fine when it was in the stock setup. w/3:55 gears.
I then had a local shop put the Torsen T2 in it. The gears started to make noise. They took the rear apart again and replaced the pinion bearing. That quite it down alittle. It was not so loud that I had to redo it. So I let it go for a year. Then it started to make alot of noise. So I took it back today the shop replaced the gears, carrier bearings, and pinion bearings. It's still making noises. I don't know if there is a problem with the Torsen or The rearend housing. Anybody have ever had this problem????

 

[walter]

This may sound too simplistic but could they be using the wrong type of gear oil? I know torsen units don't require any friction modifiers unlike the clutch type limited slip units so they may be using something too light for the diff because of that. When I had my 240SX I installed a helical/torsen type LSD and ran it with Redline heavy shockproof oil. Operation was cool, smooth and most of all QUIET.

 

[SpartaPerformance]

M-4204-F3180(2) 8.8" 31 spline Open Differential
M-4204-F288(2)(3) 8.8" 28 spline Traction-Lok
M-4204-F318(2)(3) 8.8" 31 spline Traction-Lok
M-4204-F318C(2)(3)(6) 8.8" 31 spline Traction-Lok
M-4204-C75(2)(3) 7.5" 28 spline Traction-Lok
M-4204-A28(2)(3)(5) 8.8" 28 spline Auburn HD
M-4204-A31(2)(3)(5) 8.8" 31 spline Auburn HD
M-4204-P31(2)(3)(5) 8.8" 31 spline Auburn Pro 2
M-4204-R31(1) 9" 31 spline Race only – Detroit Locker
M-4204-T28(4) 8.8" 28 spline T2 Torsen Differential
M-4204-T31(4) 8.8" 31 spline T2 Torsen Differential
NOTES:
(1)Off-road use only!
(2)Will accept anti-lock exciter ring.
(3)Requires 4-ounces of CM-19546-A1 friction modifier with initial fill.
(4)M-4204-T28 fits 1999 Cobra/Thunderbird/Mark VIII with IRS (2001-04 Cobra has 31 spline).
(5)Recommended for street use only.
(6)Fits 2003-04 Cobra.

If you used F288 diff for Traction-Lok, as you can see by the foot note number (3) it requires friction modifier.

 

[NastyStang113]

As a side note, some gear oils already have the friction modifier added to them like Royal Purple.