[alrobjr]

The Rear End Is A 10 Bolt 7.5 On 1981 Monte Carlo.when Im Accelerating I Hear A Whine,de-accelerate And The Whine Stops.it Only Happen When Im Mashing Off In It.i Need Some Help Fellows.

 

[302 Z28]

Sounds like a gear problem. Have you recently done anything to the rear axle?

Vince

 

[prostreet6t9]

You might check and see if the pinion moves in and out a little. If it does you may have a pinion brg going out. If the pinion feels good, I would be looking at the gear set.

 

[Carlos Murphy]

noise

Sounds like the ring and pinion, under acceleration loads the drive side of the ring gear teeth are in contact with the pinion, under deceleration back side of the teeth are in contact with the pinion.
If the diffs never been apart, sounds like there's ware goin on on the drive side of the ring gear. Remove the cover to inspect, if all looks good, wash the gears off with carb-clean, apply white grease to a few ring gear teeth and rotate a wheel once to see the contact pattern of the pinion on the ring gear teeth, should be right in the middle.

 

[alrobjr]

Rear End

I WOULD LIKE TO THANK YOU GENTLEMEN FOR ALL OF THE HELP. WHAT GM CAR CAN I GET A 12 BOLT LIMITED SLIP THAT I CAN INSTALL IN MY 81 MONTE CARLO? :thumbup:

 

[1ownerT]

I WOULD LIKE TO THANK YOU GENTLEMEN FOR ALL OF THE HELP. WHAT GM CAR CAN I GET A 12 BOLT LIMITED SLIP THAT I CAN INSTALL IN MY 81 MONTE CARLO? :thumbup:

Economically there isn't one, by time you find one, pay the going rate, etc. There are 8.5 10 bolts, direct fit, hard to come by, GN, 442, then there are the 9" Ford set up as a bolt in.

http://www.moserengineering.com/Pages/Housings/hous-ford9.html
http://www.moserengineering.com/Pages/Housings/hous-moser12.html

 

[alrobjr]

Rear-end

THANKS VERY MUCH MR.1 OWNER T,I WILL TAKE YOU MUCH HELPFUL ADVICE. BIG AL :thumbup: