hi guys my dad is wanting to change the fluids in his truck{03-6spd}his manual says put manual fluid in the tranny,it doesnt specify what type,what would you giys recomend for tranny,t-case and diffs?he tows a small 5er in the summer, thanx dave

 

For the NV5600 use Pennzoil Synchromesh fluid, Redline MTL or Amsoil MTF. Transfer use ATF+4, diffs use synthetic 75w-90.

MikeyB

 

I run Redline MTL in my NV5600, the Dodge ATF in the transfer case, and Redline 75W-140 in the differentials... The dealer suggested the heavier weight for towing in hot climate...