I just bought fast coolers for the trans and a mag-hytec cover for the rear.The service manual says to use mopar trans fluid and mopar gear oil. Has any one used a different brand of oil? If so what brand did you use?Thanks.

 

You should spend some time browsing this forum; lots of us use all kinds of different fluids. Personally, I'm running Amsoil in both diffs, tranny, xfer case and engine. Mobil1, Royal Purple are some others that are popular for the diffs; and Redline is another good choice for the transmission. There are others as well, its just these came to mind quickly.

Oil "discussions" are one of the more emotional topics around here.