Haans249

iTrader: (24)

Wow really came back from the dead!

I took my aftermarket driveshaft and had it lengthened. It was pretty short and barely hanging off the output shaft of my trans.....it helped by like 5db aka... didn't do **** about the noise.

I haven't done anything with it since, I will most likely take it to a shop here and have new gears put in and setup. Hopefully they can get it right..

BTW, I have a strange aluminum center section on mine.

Camaro Junky

I hope it works. Thanks for the vid Haans.

justinj

iTrader: (2)

Man try some 85-140 Lucas oil.. made mine ok to stand. Now i don't have to turn the radio up so loud. Mine sounded just like yours if not louder.

Camaro Junky

I put in 3 bottles of the friction reducer, the sound changed but did not go away. I think I am gonna put in 5 more bottles and see what happens. It seems to be doing something. lol

HeavyMetl

iTrader: (2)

Im dealing with the exact same sound in my 9", its so loud it hurts the ears. Here's the kicker though...I borrowed a 3.73 31 spline unit that I knew to be quiet and howls EXACTLY like my previous 4.11 set. I just don't get it...makes no sense. I don't know where to even start now for a fix, since my problems obviously aren't gear related. I've even swapped in my spare T56 just to see it anything changed at all.

zacht

iTrader: (18)

ill throw this information out. check how much play is in your pinion as well. when i received my 9in, it would whine loud as hell on decel...the pinion moved around quite a bit....side to side...what happened is the new yolk was shorter than the pinion shaft...and it just got loose...i took off the nut and put in a few washers and tightened it up...pretty quiet rear end now...

98cherrySS

iTrader: (2)

I am bumping this old thread as I have the exact same sound coming from my BRAND NEW 9" rear end. Curious if others have experienced this and what the solution was?