Originally Posted by
tsair
I went through the whole drivetrain, serviced the diffs and put in all aluminum pulleys and gear diff pulleys and replaced the front belt anyway. About half of the play was eliminated, so I'm guessing there is just a little bit of play in the belt system that develops over time.
I'm curious why there are still two pulleys (the ones for the side belt) they don't make aluminum versions of? Do these take less of a beating than the rest of the pulleys?
The play that you are feeling is in the rear large pulley and small one. Over time with a hot mod motor the small pins in the jackshaft /layshaft will slightly wear the slots in the plastic pulley's. I simply put a couple drops of CA in the slots and it locks it down great...no more play. I don't think its that big of a deal and I've never had a pulley or side belt fail, heck a year on this car and still all original belts. My car is stock with a 6.5 and it's been the most reliable wheeler I've ever had.