strokednblown

My 9" rear will be here tomorrow and i am wondering what rear diff. fluid to put in it and if it needs and additive for the Detroit Locker?

- thanks

SS SLP2

iTrader: (8)

do not use synthetic, only generic 80-w90, use no additive with the locker
Johnny

DAVESS02

iTrader: (30)

I'm switching to synthetic Amsoil 75W-140 in mine. I've been using Valvoline synthetic for 5k. No problems and gears are quiet. Moving up to the heavier stuff to see if it quiets the locker a bit. At any rate, the locker has no clutches so no friction additive needed.

ElkySS

iTrader: (6)

if a rear has no clutches why couldnt you use synthetic?

BlackScreaminMachine

iTrader: (17)

Some people try to do that to quiet it down or have some extra lube to quiet the engagement. With a tru trac it may mess it up. The shop that did my gears added GM lube to it and I gotta flush the rear at some point and run enough oil for 2 changes to flush it all out.

strokednblown

So do most use synthetic or regular with a detroit locker?



- Just got of the phone with Eaton and they said using an additive is a waste of money. They said use generic 80/90.

thx johnny

kenSS

iTrader: (1)

i have regular 80 90 in my S60. no problems so far.