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| | | | Joined: Nov 2021 Posts: 1,258 'Bolter | | 'Bolter Joined: Nov 2021 Posts: 1,258 | Now that I have begun driving some I have a noise I think I know what it might be. Looking for a confirmation or another idea.
66c10 3.73 factory posi.
Sharp turns there is what sounds and feels like a rubbing or grinding noise. I can hear it, and feel in steering wheel. Nothing rubs on front end.
The read end was hosed when I got the truck. I paid to have gear set changed. I am wondering if this noise is the posi?
While in the air I am unable to rotate tires independently of one another which I always thought was strange. | | | | | Joined: Feb 2016 Posts: 1,982 'Bolter | | 'Bolter Joined: Feb 2016 Posts: 1,982 | When you re-assembled the rear axle and differential, did you add posi additive with the gear lube? If it is a clutch type posi unit it will chatter and grab when cornering if it doesn't have the posi additive.
1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy
| | | | | Joined: Feb 2004 Posts: 29,755 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,755 | Ditto on the additive- - - -it's needed to prevent the limited slip clutches from chattering in a turn- - - -the sharper the turn, the more likely the clutches are to shudder due to the speed difference between the axle shafts. This is true regardless of whether the limited slip system used discs or cone clutches. Yes it is possible to turn the wheels independently of each other, but it takes more torque than you can put on the wheel by hand. Some manufacturers used to publish a torque spec to check the clutch pack preload- - - -I seem to remember it being somewhere in the range of 100 ft-lbs. A torque wrench adapter was bolted to the wheel studs, and one axle was forced to turn with the other wheel on the ground.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Nov 2021 Posts: 1,258 'Bolter | | 'Bolter Joined: Nov 2021 Posts: 1,258 | I thought the oil I bought had the additive in it, but I am not sure two years later. It has to be the noise, it just sounds different to when I have heard a posi noise in the past. | | | | | Joined: Mar 2004 Posts: 6,214 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 6,214 | I've never seen oil sold with the Posi Trac additive already in it, I've always gotten it in a small tube or bottle and added it to regular gear oil. Mike B  | | | | | Joined: Feb 2004 Posts: 29,755 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,755 | For instance- - - - www.ebay.com/itm/321060145209?The same stuff is available with a MOPAR or Ford label, for people who believe there's a difference. P.T. Barnum is alive and well.
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Sep 2011 Posts: 1,452 'Bolter | | 'Bolter Joined: Sep 2011 Posts: 1,452 | After you get the additive in it drive in circles, should get better. The clutch pack will always supply some resistance on this design.
BC
1960 Chevy C10 driver 261 T5 4.10 dana 44 power loc
1949 GMC 250 project in waiting
1960 C60 pasture art
Retired GM dealer tech. 1980 - 2022
| | | | | Joined: Nov 2021 Posts: 1,258 'Bolter | | 'Bolter Joined: Nov 2021 Posts: 1,258 | | | |
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