cthomas

I need to change my rearend fluid and need to know what brand to use? It's a '98 Z28 with an A4 and 2.73's. I believe it's an Auburn, from what i've read, and supposed to use regular oil and a posi additive, correct me if i'm wrong. What brand and weight should I use for the oil and what brand of additive?

Blacker

iTrader: (3)

Just get 2 quarts of 80W90 gear oil and 1 bottle of additive. I use Vavloline but, many other brands are good too.

cthomas

Is the additive Valvoline too, or is this something you have to get from the dealer?

ULTIMATEORANGESS

iTrader: (4)

i went with lucas 80w and GM posi additive.

skewba98z28

iTrader: (14)

Use the GM posi additive that is what they used when mine got rebuilt.

2001NBMZ28

I use the GM LSD additive too, about $7.50 at the dealer. PN 1052358