I have a "whining" sound coming from the rear end that I just put in my '79 Camaro. It only does it under power. When I back off the gas,
It stops, step on it ,even slightly and it starts again. No clunks, or grinding, just this
kind of high pitched whine. It is a 3:08 posi from an '81 Firebird Thanks.
There is just some wear on the ring and pinion as long as the whine does't get louder or start doing it when you let off the gas don't worry about it. My old Nova wagon has been doing it for 15 years and I haven't touched the ring and pinion.
when ihad 4.10s in my car it also whined like that but mine only whined around 1800 to 2000 rpms im not sure what it was but i think your suppose to hear so much winding with a low geared rearend though not sure
My ex-neighbors 73 chevy truck had the same problem...problem was the pinion nut kept backing off and was creating tons of slack in the rear end...we ended up replacing the rear end after the old one grenaded. You might want to check it out!
I also have a co-worker with a 77 chevy 3/4 ton van (400sbc/th400) with a 3.40 geared 12 bolt...it whines like crazy. He said it has done it since new and now has 156k miles on it with no trouble.
375hp 78 Chevy truck
77 Chevy Nova
95 Chevy Lumina 3.4L
and building a 78 Nova
[This message has been edited by travis (edited 03-26-2001).]
only 2 things could cause the rear end to whine. 1. the ring and pinion was setup incorrectly in the previous car and has worn that way. 2. when you installed the gears in your car, the backlash/pinion depth was adjusted wrong. if the whine only started after the gears were put in your car, i would make adjustments, otherwise let it go as long as it doesn't get any worse.