gmasterfizzle

My 99 z28 has always whined since I've owned it, but only under deceleration. Its very loud at highway speed and gets gradually lower in pitch and loudness as i slow down. I used to think that it was some kind of exhaust noise but noticed that the whine is constant no matter what the RPM. I have no idea what causes the noise; any help is appreciated. Thanks

joe77

gears are screwed, if its been that long then probably damaged some more things in there. Might need a total rebuild in which case you might want to look for a good used one or for a 9 or 12bolt

gmasterfizzle

Its not the bearings needing replaced?

slowl61

most likley needing a rebuild, how mant miles on the unit?
and do you track it?

gmasterfizzle

I bought it with 75k, has 81k now. I've never been to the track with it, but don't know about previous owners. How much does a rebuild usually cost?

slowl61

i built my 10 bolt for 500$
this should help you a bit
http://www.highperformancepontiac.co...ferential.html

gmasterfizzle

I took a video today at highway speeds that has the sound in it. I coasted from about 70 down to 50ish twice

http://www.youtube.com/watch?v=Z07hP0ZQWRg

cody123

it's your rear end for sure man. Same thing happend to my camaro with 70k miles. I put in a used 10 bolt out of a 6speed with 3.42 gears and it's even whining a tad. Not near that bad but still whines...wonder if i need to get it looked at? but yea the damage is done on yours i'd get it checked out

2002 T/A

Sounds like excess backlash due to wear, mine were the same. Get yourself an AAM gear from Jaws, I went 3:73 for a little more pull. I also have a Motive 3:90 for sale but they are not as quiet as the AAM, but pulls nice and not the compromise of the 4:10. Les>>>

1BAD98LS1

iTrader: (33)

May be better off to find an entire 10 bolt for sale. Prolly cost just as much to rebuild one.