Diff fluid?
10-18-2012, 10:58 AM
#1
Teching In
Thread Starter
Join Date: Oct 2012
Location: Fort Worth, TX
Posts: 19
Likes: 0
Received 0 Likes
on
0 Posts
Diff fluid? 99 SS, How much diff fluid, what weight, and what kind is suggested? im sure it depends on if my diff is limited slip or standard in which case how do I find that out?
10-18-2012, 12:50 PM
#2
LS1Tech Administrator
iTrader: (3)
Join Date: Nov 2001
Location: Schiller Park, IL Member: #317
Posts: 32,309
Likes: 0
Received 1,734 Likes
on
1,244 Posts
If you have the original rear end still, then it would be a Torsen limited slip (you should see the RPO code "G80" on the SPID sticker). As it's an SS, I suppose someone could have originally ordered the car with the diff upgrade option from SLP. But chances are you have the stock rear, which calls for 1.75 quarts of 75w90 synthetic fluid with a bottle of GM LSD additive. Some people argue that the additive isn't needed on the '99+ rears, so that's up to you to decide.
10-28-2012, 10:01 PM
#6
Staging Lane
Join Date: May 2012
Posts: 50
Likes: 0
Received 0 Likes
on
0 Posts
If you have the original rear end still, then it would be a Torsen limited slip (you should see the RPO code "G80" on the SPID sticker). As it's an SS, I suppose someone could have originally ordered the car with the diff upgrade option from SLP. But chances are you have the stock rear, which calls for 1.75 quarts of 75w90 synthetic fluid with a bottle of GM LSD additive. Some people argue that the additive isn't needed on the '99+ rears, so that's up to you to decide.
This is what i do when needed.
