Originally Posted by
e240
Plate LSDs will clunk - I used to use an ATS and man, did it Clunk, especially at low speeds, sharp turn - TUnK TUnK TUnK, at the same time, you can feel the steering pushing, and the car lunching like both wheels are locked (But hey, thats whats its for isn't it) . It shouldn't really happen at high speeds especially when in 3rd (or maybe I just don't notice it at higher speeds).
Plate LSDs are good, much better than Helical, IMO, but Must keep in mind that both serve a different purpose, i.e. Helical more for street use (quiet, maintenance free and works under 90% of street situations)
You can actually test the service limits on the LSD and see if its working with the gearbox in the car. You need a torque wrench (the Dial/gauge type, jack up the car and then with the torque wrench, attempt to turn the axle - The torque reading you get until breakaway will tell you if the LSD is ferked or not.