Rear end fluid

[Mschaffer92]

I am in the process of wanting to change the rearend fluid and have no idea what to put in there. I also wanted to paint the rear end cover. Do i have to use any special paint for it. If it matters i have the 14b sf axle with posi trac i believe

Sent from my camo'ed GS3

 

[91Bluestreak]

80-90 gear lube. If you want to run synthetic you will need to make sure that you have a gasket on the rear cover, not just rtv.

 

[GMCTRUCKS]

If it's a Posi any auto parts has the additive.

 

[92GMC]

i run 80-90w with friction modifier in all my rear ends ls or not.

 

[Blue95]

Uh I don't think you need additive if you mean you have a G80. Additive is only for LS and additive in a rear end that doesn't need it is asking for trouble for sure.

 

[outalne94z71]

Uh I don't think you need additive if you mean you have a G80. Additive is only for LS and additive in a rear end that doesn't need it is asking for trouble for sure.

a g80 does need it, it has clutch packs

 

[outalne94z71]

80-90 gear lube. If you want to run synthetic you will need to make sure that you have a gasket on the rear cover, not just rtv.

all you need is permatex right stuff, its ready to fill in 1 minute and never need a gasket and is fairly easy to remove if need be, it is a rubber sealant instead of silicone, just awesome stuff

 

[1997chevydriver]

a g80 does need it, it has clutch packs

G80 has clutches?? I thought it had the centrifugal weights?

Edit: my bad...... it has both.

Sent from somewhere in MN

 

[ChrisAU]

Yeah, do not put additives in G80 diffs!

 

[Blue95]

a g80 does need it, it has clutch packs

No it does not, it specifically says no additives for a g80, either 80W-90 regular or 75W-90 syn