Rear Whine Please Help... Very Strange!!!!!!
03-13-2002, 06:15 PM
#1
Rear Whine Please Help... Very Strange!!!!!! I went from 273 to gm 342's, changing the carrier, install kit, etc. It had a slight whine at 40-45 then went away over that speed. I put in Lucas rear differential oil, Mac lca's, and an aluminum[new GM] driveshaft.The whine is now at 65-75 on slight acceleration!!! Any insight will help. Im going with royal purple 75w90 next, and 1le lower control arms, rubber bushings but harder than stock, less noise transmitted. Any thoughts???
03-13-2002, 09:15 PM
#3
Re: Rear Whine Please Help... Very Strange!!!!!! Use heavier oil to quiet it down a bit. If that doesn't help then you got your gears misaligned. The reason you can't hear above that speed is that it's so high pitched your ears just won't hear that frequency. Did you make sure that your pinion has no fore aft movement on install? There are tons of things to adjust as you probably know.
