Quote:

Anyone have any recommendations as to the type of lube to use in my 4 speed tranny? We've heard some say synthetic and others not. Any opinions?






IMHO, if your 4spd had ATF in it, run it with that if you so desire, if it had gear oil (80w-90) run that, personally over the last 30 years I've always run gear oil in my Mopar 4spds I've seen too many guys over the years that say "The FSM says ATF", and they switch out the gear oil, and find that one or more several things happen, the tranny craps out big time, or it leaks like a sieve with the ATF, or it shifts like crap....so after you cut thru the "mustard" of this thread, and pic your poison, report back with your opinion

Mike