diff service

**znasty** · 03-16-2010, 04:23 PM

this weekend i will try to change oil and new gasket on diff. i plan on going to local parts store is there a part number for the gasket? and im going to look at moble1 or royal purple 75w-90. do i need to get some additive also? does the royal purple allready have this additive?

**Cutlass** · 03-16-2010, 07:10 PM

We try to avoid royal purple. And yes you need the additive but you can add it later if you can't find it right away

**znasty** · 03-17-2010, 12:34 PM

ok no rp i did search, can i get the additive at my local parts store?

**Cutlass** · 03-17-2010, 06:43 PM

some have it, some don't. If you can't find it, then try the dealership

**znasty** · 03-19-2010, 04:20 PM

i found some additive for diff do i put the whole 7oz in

**WhatUpWhatUp** · 03-19-2010, 08:07 PM

whats the additive that we should put in ? cause i dont put any additive in when i change my oil.

**67CamaroRSSS** · 03-19-2010, 08:16 PM

Originally Posted by WhatUpWhatUp

whats the additive that we should put in ? cause i dont put any additive in when i change my oil.

Posi additive. Allows the clutches (or cones depending on rr type) to slide against each other when going around corners.

**Lawnboy** · 03-19-2010, 10:00 PM

the gaskets leak! use a gas/oil RVT sealer, run a bead on both the rear end and on the cover, make sure both are super clean, Might as well order a TA cover girdle and blot kit,
I run lucas oil/gear addative and lucas rear end diff gear oil ,a quart of each