SoxXpupPeT

iTrader: (34)

Im making sure i have everything i need to get my rear together but im unsure of which oil i should use. Nor how much and if any additives are needed.

The rear is an 8.8 with a toresen diff. Stock f-body width if that matters. What gear oil would everyone recommend ? Would i need to run an additive like i would have to run for the stock LSD ? Thanks

01ssreda4

iTrader: (96)

Typically torsens do not require posi additive bc they are gear driven. Gears dont need additive, clutches do. Since it has no clutches you're good.

SoxXpupPeT

iTrader: (34)

Thanks thats what i was figure. Id much rather be safe then sorry tho. Who makes the best gear oil for that? and what weight should i run ?

killagt

iTrader: (3)

Valvoline 80w90 ( or pay 1 dollar more for durablend )
Or lucas 80w90
I think with that ford 88, u can use 75w90 mobil 1 or 75w140 mobil 1
change it every 30k or 1 year or 2 year.

Im currently running lucas 80w90 and plan to change out every 2 year.

SoxXpupPeT

iTrader: (34)

Thanks. ill just stick with a good 80w-90. how many quarts should i put in it ?

jim ravencraft

Hi,
pick-up three (3) and have some left over..........do not over fill!!!!!!!
Good luck and have a blessed weekend..........captain jim

01ssreda4

iTrader: (96)

I run the cheapest crap 75/90 I can find. Coastal I think is the brand.

MasterTomos

iTrader: (15)

GM or lucas oil for me. I know Royal Purple has caught a lot of negative attention for rear end failures, not sure if it's true and it'd be really hard to prove-I'm sure it's just because they're supposed to be "the best" so people bitch about when anything goes wrong with their car when they use the product. Hard to say, but I've seen enough negative claims towards RP specifically, I'll steer clear on their gear oil.

SoxXpupPeT

iTrader: (34)

Thanks for the replys guys. I was thinking of perhaps redline gear oil. Not alot of negative things from them. And i use there D4 in my t-56 with nice results. im still not 100% on how much to put in. 2qts?

tittan1500

iTrader: (8)

Local parts store 80/90

killagt

iTrader: (3)

buy 2 quart

SoxXpupPeT

iTrader: (34)

tyvm!

94Z28-MSTGKLR

iTrader: (20)

I use royal purple in my auburn rear diff. Not a comlaint here. If something breaks I highly doubt it would be from bad fluid...to much or too little will do damage though.

TORCHD 02 TA

iTrader: (39)

My car is not a DD.. So I changed my gear oil back in 3/2009.. This is what I used..

2 qts Valvoline no syn 80w90
1 LSD additive
1 Felpro Gasket
1 thing of black RTV sealant


I know their is a debate on whether or not to use syn gear oil.. I used no syn, never noticed a difference. But then again I added LSD additive

And this is the GM TSB:

GM issued a technical bulletin adding modifier to the rear axle oil. This was done to quiet what we call a "Rusty Screw" noise that we heard in a very small percentage of vehicles. This does not happen in all cases, however to address owner's concerns we asked that the modifier be used in all instances to insure that the driver would not get this noise. When replacing the fluid it is at the owner's discretion whether or not to add the modifier. Elimination of the modifier does not affect durability of the differential.

SoxXpupPeT

iTrader: (34)

Thanks guys. I got 80w-90 redline non synthetic. 2 quarts. I dont think ill have any issues.

TORCHD 02 TA, I have a torsen dif for a ford 8.8 which doesnt have any clutches. But thanks for the reply Its good information to have.