How much rear gear fluid to use??

[RockstarMentality]

Wow, its been a while since I've been on here.
Anyway, the guy at Advance Auto told me I need 4 qts of 75w90 and an (optional) bottle of friction modifier. I picked up the modifier, but this seems like a lot to me. Can anyone confirm this?

 

[Garbone]

You squeeze it in, until it dribbles out, then you are done.

 

[RockstarMentality]

Thanks man!

 

[fastbanshee1999]

you shouldnt need more than 3 qts of fluid and add the bottle of friction modifier.

 

[F1atlander]

I've never had to use more than 3 qts in any 8.8

 

[OnyxCobra]

Friction modifier definitely isn't optional, unless maybe if you get a fluid that already contains it.

 

[F1atlander]

I never use the modifier but I also add extra shims/discs to every rearend I build.

 

[OnyxCobra]

Well the idiot that did my gears didn't add any to mine and lets just say taking turns was not a smooth experience.

 

[F1atlander]

Heard of this from others, almost like someone put a mini spool in. Guess Im lucky or just picky with a mic and dial indicator.

 

[justinschmidt1]

Well the idiot that did my gears didn't add any to mine and lets just say taking turns was not a smooth experience.

Hmm, I thought it just wouldt lock up without any friction modifier?

I dont see why turns would not be smooth

 

[MadStang]

Hmm, I thought it just wouldt lock up without any friction modifier?

I dont see why turns would not be smooth

not enough = moaning
too much = limited slip not engaging

 

[F1atlander]

the modifier lets the clutch discs slide alittle. keeps the wheels from chirping around turns.

 

[justinschmidt1]

not enough = moaning
too much = limited slip not engaging

Oh, did not know that.

Learn something new everyday lol

I was thinking the opposite. I thought the friction modifier added friction but I guess not.

 

[RockstarMentality]

Yeah, it turned out to be only 2.5qt with the modifier
Don't think I'm going back there lol

 

[robb15033]

Yeah, 8.8"= 3.75 pints + bottle of modifier if cover is dropped. Nice car, looks pristine.

 

[framda]

This stuff used to be oil from sperm whales until sometime in the 80's when the changed to synthetic/organic mix. The best was made by GM. Used to get my Chevy friends to pick it up for me so nobody would see one of my cars at the Chevy dealer.

 

[robb15033]

Yeah, The Ford friction modifier is now the preferred. I've seen it included with kits for all makes and models.