golden

At about 10mph a small whining noise comes out of the axle and the faster i get , bigger is the sound . It sounds like a plane at highway speed . It's a 89 bird LO3 with 700r4 and 2.73 gear .
Is it the wheel bearings or the internal bearings?

tank89tpi

im having the same problem out of my 89 t/a... sounds like a bad whining sound and it sounds like its coming from the rearend. mine just started the day after i did a few donuts in a parking lot so i figure i broke something but if anyone knows i'd like to know what it is. email me if you may know something tankomatic420@yahoo.com

camaronewbie

My rear whined with speed - higher pitch at higher speeds - it was the pinion bearing in the rear end. Not a hard replacement - remove drive shaft from rear, move it aside (but leave it in the tranny unless you want a tranny fluid bath), and go from there.

Make sure you mark the driveshaft so you get it back right - bolting it back the same way makes a difference in balance.

Get the solid pinion spacer instead - to replace the crush sleeve (you can search here for the part number - I think they can be had from Summit).

And get a brand new pinion nut, they aren't supposed to be reused. Any parts store will have it.

golden

thanks man...

camaronewbie

No problem - I hope that's all it is for you - it's a cheap fix and easily done in the driveway. Email me if you need anything else - I may not know, but I'll gladly try!

82 Iron Duke

iTrader: (21)

Well since this thread is already opened I have a ? When I am driving I hear a soung like the rear tires are scraping on the inner fender, well but I have checked and the tires are not scraping. I have a new 10 bolt posi rear end on her could I have the same problem or is this a normal sound?

camaronewbie

a "scraping" sound - gears would be more of a whining sound - maybe the rear brakes - I'd check brakes first before I started tearing into the rear.

82 Iron Duke

iTrader: (21)

I sounds more like a rubbing sound than a scraping sound. Have you ever been in a car and heard the sound of the tires rubbing on the ineer fender well? It sounds exactally like that, the brakes are newly redone with new crossed drilled rotors

camaronewbie

OK - rubbing sound might be rear then - a very low pitched "whining" - like when your tire runs over the yellow line onto those grooves in the pavement to wake you up!

brrrrrrbrrrrrrbrrrrrrbrrrrr

I'm no expert at all ... but I know my whining rear was pinion, and it was an easy fix so I tried it myself and was successful. Does the sound change pitch with speed? You could try pinion bearing as well - it's not hard to do, and way cheaper to replace than having the rear tore into by a shop.

Is it a 4th gen rear by chance? If so, you might wanna register and post question on a 4th gen board - they would know more about the 4th gen rears - they change to zexel-torsion diff's in the 4th gen line somewhere - a whole new posi beast. The only part of a rear I'll venture into is the pinion bearing, and removal of the c-clips for wheel bearings - beyond that it's time for a pro in my book.

tank89tpi

i just took my car to the shop on wednesday and i was told it was the pinion bearing making that noise... it got worse and worse and i finally parked it. planning on rebuilding the whole car so hopefully i can just go ahead and buy a whole new rear end but just wanted to let you know that a few other people agree that that sound came from a bad pinion bearing.