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Registered
Join Date: Jul 2006
Posts: 102
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How to check LSD trans
How do i check an LSD trans??
Guy says its rebuilt but has not checked the diff LSD clutches |
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08-11-2006, 08:43 PM
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Ornery Bastard
Join Date: Sep 2001
Location: South Sound
Posts: 2,880
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Car up in the air and in neutral. Spin one rear wheel. If the other does not spin, or spins backwards, the LSD is shot. If the other wheel spins in the same direction, it's OK.
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--------- Silver 1998 Volvo S70 T5 <- Daily (Anja) Guards Red 1986 951 <- Seattle car (Gretchen) White 1976 914 2.0 F.I. <- Prodigal car, traded away then brought back again (Lorelei) |
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08-12-2006, 08:27 AM
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Super Moderator
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there actually is a way to check if the LSD clutch is okay. it involves jacking up one side of the car, and using a torque wrench to turn the free wheel to measure the amount of slip resistance. i don't recall what the actual numbers were, but they should be in here if you do a search.
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'89 turbo-s (2.7, wolf3d ems, garrett dbb turbo, tial 46mm, etc. fast!) |
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08-21-2006, 11:49 AM
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Registered
Join Date: Mar 2004
Location: Seattle
Posts: 155
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If you jack up one side and turn one rear wheel by hand, it should feel like there's some resistance, like a brake is dragging just a bit.
That would be interesting to see what the torque reading should be. I know my lsd is in good shape, I could try to get a reading sometime today, I'll bet it's a pretty low #. |
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09-06-2006, 08:45 AM
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Registered
Join Date: Jul 2006
Posts: 102
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Sounds like a good way to check it except its a trans i just bought. How can i do it on the bench?
Does anyone know someone they can get the torque spec from?...........G |
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09-06-2006, 04:29 PM
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Super Moderator
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search and you shall find.
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'89 turbo-s (2.7, wolf3d ems, garrett dbb turbo, tial 46mm, etc. fast!) |
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09-06-2006, 04:33 PM
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Registered
Join Date: Mar 2004
Location: Seattle
Posts: 155
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So what happens when you spin one of the output shafts? Does the other side go the same way?, or opposite?
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09-07-2006, 06:45 AM
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Registered
Join Date: Mar 2004
Location: Seattle
Posts: 155
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So I jacked one side of my car up, and tried both my torque wrenches, but both are apparently too heavy, the resistance of the lsd was too low to make either torque wrench clic even on 0 pounds.
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09-07-2006, 02:18 PM
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Super Moderator
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what's the lowest setting on your wrench ?
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'89 turbo-s (2.7, wolf3d ems, garrett dbb turbo, tial 46mm, etc. fast!) |
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09-12-2006, 08:13 AM
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Registered
Join Date: Mar 2004
Location: Seattle
Posts: 155
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I have a snap-on 1/2" drive, and a mac 3/8" drive, they're the 'click' type where the handle spins to adjust the setting, so whatever is minimum is not low enough, it appears they go to zero, but there's some few pounds resistance there.
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09-12-2006, 08:34 AM
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