What differential fluid to use

[jonesde2]

Please give your advice on what the best differential fluid when I change.
Thanks

[Cave Man]

Amsoil is good stuff. Just click the banner.

[KCMAGS]

Redline synthetic 75/90 & don't forget the GM diff additive

[GR8 WHITE]

I went to the dealership and they turned me upside down for two quarts of 75/90 at $30 each and some limited slip at $7.99 each. I went to Aoutozone and got some Mobile 1 75/90 synthetic. Used the GM supplied limited slip. Drain old gunk out and wait a few minutes to get it all out. Then easily pour in one quart, then the limited slip, and top off with 2nd quart. If you can't do it yourself, I paid $30.00 to have mechanic do it for me. Most likely, $25.00 too much! It takes about 5 -10 minutes to do it all. No more. But sure beats getting the rear differential seal repaired! 10 minutes as compared to an entire day at $400 or more! hell, just go with 3:73 gears and get it all done at once...Hahahahahahahaha

[DennyM]

Amsoil with the 4 oz of limited slip going in in Nov. See Amsoil site for product number. SubDriver and DJWorm on the forum here can help you with Amsoil.

[UstaB-GS549]

Royal Purple works for me. I put it in the car late spring. Doesn't need LSD additive.

[Subdriver]

Originally Posted by Cave Man

Amsoil is good stuff. Just click the banner.

Originally Posted by DennyM

Amsoil with the 4 oz of limited slip going in in Nov. See Amsoil site for product number. SubDriver and DJWorm on the forum here can help you with Amsoil.

Thanks for the mentions.

This is AMSOIL's best gear lube and what I use for the track:
AMSOIL Severe Gear Extreme Pressure Synthetic 75w90

AMSOIL Ordering Information
AMSOIL Preferred Customer Program

[gasboy]

redline 75/90 for me.no additive needed.