I have a 91' Z28 w/ a WC T-5 trans, and the trans fluid has never been replaced that i know of. i heard the redline synthetic manual trans fluid works good. and i was also considering changing the rearend fluid. what do u guys reccomend for a good brand? i didn't want to just bring it to a oil change place and have them just put in some generic brand if it is gonna make a differnce if i use something better like that redline synthetic.

 

I think that most t5's come with atf so if your going to use Redline I would go with their D4 atf it is a full synthetic. As far as the rear end goes either the 75/90 from Redline or the same weight in Mobil 1.