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Grady Clay Grady Clay is offline
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Join Date: Dec 2003
Location: Arapahoe County, Colorado, USA
Posts: 9,032
Not necessairly so.

The LSD in a 915 is just that - limited. When there is sufficient torque applied theough the diffrerntial then the two side gears are forced together and the clutches tend to engage. If the clutches are set "soft" or have many street miles at all then the "turn the axle-flange" test won't work. It acts just like a regular differential.

Take the far side axle-flange off, undo the side plate and look. A LSD has a machined and welded cylinderical housing. A regular differential has a semi-spherical cast housing. Obvious difference.

When I use a LSD, I set it up so it takes a large wrench to get the two axle-flanges to turn in different directions. The car is much more stable in transition from trailing throttle oversteer to power oversteer and back to neutral handling by apex and out of a corner.

If this is for a race car, have a welding pro weld a stock differential solid. This should be done with the axle-flanges torqued in place and by someone who knows how to weld alloy steel to cast steel. The ring gear and bearings should be reboved and the entire assembly heated appororiately.
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Old 01-06-2004, 10:53 AM
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