Da wheel don't spin!
July 13th, 2010, 01:54 AM
#1
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Da wheel don't spin!
I was wondering about the Lim slip (o) differential in my car. I jacked the car up so that the rear wheels are off the ground. When I turn one of the rear wheels the opposite wheel turns some times but also doesn't turn some times. When I give it a quick turn Fwd then Rev is slips (opposite wheel doesn't turn) this only happens intermittently. Is this normal for a Lim slip diff (posi)?
July 13th, 2010, 02:57 PM
#4
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Nah the brake is not sticking. Have changed the diff oil and added the LSD additive. Its like when i grab the wheel by hand on one side and give it a turn the opposite wheel some times turns same direction but some times also doesn't turn (slips) This happens while turning the wheel in either direction (fwd or rev) Is this why they call it a Limited slip differential? Mine seems to be Maximum slip differential LOL. Oh yeh, its an "O" diff from an Olds 69 442
Last edited by ralsy; July 13th, 2010 at 03:00 PM.
July 13th, 2010, 03:03 PM
#6
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If both wheels don't spin the same direction when spun by hand, then your limited slip is fried. Needs a rebuild.
The Chassis Service Manual describes a procedure for testing the limited slip. Put the trans in neutral. Emergency brake off. You jack up only one wheel so that the other is held fast by the ground. Then you use a torque wrench to measure how much torque is needed to spin the one free wheel. 25 ft lbs (IIRC) or more is considered good. Ideally, this is measured with the torque wrench's head centered on the hub, which means you need some sort of adapter plate. But if you just put the wrench on a lug nut, I'd consider it close enough.
The Chassis Service Manual describes a procedure for testing the limited slip. Put the trans in neutral. Emergency brake off. You jack up only one wheel so that the other is held fast by the ground. Then you use a torque wrench to measure how much torque is needed to spin the one free wheel. 25 ft lbs (IIRC) or more is considered good. Ideally, this is measured with the torque wrench's head centered on the hub, which means you need some sort of adapter plate. But if you just put the wrench on a lug nut, I'd consider it close enough.
Last edited by BlackGold; July 13th, 2010 at 03:09 PM.
July 15th, 2010, 12:44 AM
#7
Ozspider
Join Date: Jul 2010
Location: Queensland Australia
Posts: 36
Hey Ralsy,
Mr BlackGold is right, that's how I would have done it.
I still am thinking of using my Olds Diff but that would mean a rebuild.
And I don't no the ratio I tryed turning one wheel with the other on the ground and that did not work, so I might use the 9''.
all the best
Spider
Mr BlackGold is right, that's how I would have done it.
I still am thinking of using my Olds Diff but that would mean a rebuild.
And I don't no the ratio I tryed turning one wheel with the other on the ground and that did not work, so I might use the 9''.
all the best
Spider
July 15th, 2010, 01:08 AM
#8
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Hey spider if you want the gurus of all gurus on diffs then in Caloundra there is the diff doctor. His name is Duncan, his buss name is Topcog. Apparently he gets diffs sent to him from all over SE Asia. He lives and breaths diffs. The more unusual the diff the more he likes them. If you need somebody in QLD here’s his number 07 54381955
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