Recomended oil in front/rear axis

I need to know what kind of oil i should use in my front and rear axels on my Tahoe 4x4 -96
In my Chilton book it recomended an 80w90 LS oil but when i drained the front axel it seamed to be red ATF fluid?? :screwy:
Hope you understand my pour english :smile:

I need to know what kind of oil i should use in my front and rear axels on my Tahoe 4x4 -96
In my Chilton book it recomended an 80w90 LS oil but when i drained the front axel it seamed to be red ATF fluid?? :screwy:
Hope you understand my pour english :smile:---------------------------------------Some gear lube has red dye in it. Just get a good quality GM lube and you should be all set.But don't forget the posi additive in the rear if you need it..

Can't go wrong using "Royal Purple". Jeg's and OiltownUsa sell it.

Amsoil Series 2000 75W-90. Best oil on the market.

http://www.amsoil.com/products/tgr.html