dapiper Posted September 2, 2009 Share Posted September 2, 2009 My clutch type LSD shudders under high torque - 13 psig boost at 5K RPM - about 350 ft-lb. Bad vibration. Just replaced clutch, but did it with old clutch. We will replace UJ half shafts with 300ZXT CV type and repl diff lube. Always had minor vib at top end. This is severe, like something may come apart. Not speed related, only shudders under torque. All suspension parts bolted tight. Using diff snubber on nose. Anyone experience this? Does my diff need rebuilt? Which part? Quote Link to comment Share on other sites More sharing options...
JMortensen Posted September 2, 2009 Share Posted September 2, 2009 Doesn't sound like the LSD to me. LSD would chatter at low speed while cornering. If you do have LSD chatter, the solution is to keep adding more additive until it goes away. You might add 2 or 3 of the little tubes or bottles of additive. Your problem sounds like driveshaft alignment or U-joints to me. Quote Link to comment Share on other sites More sharing options...
dapiper Posted September 3, 2009 Author Share Posted September 3, 2009 Oh good. We suspected diff after observing similar shudder on our drag car. How could drive shaft be malaligned. Hey, maybe it's bent? Naw, then it would vibrate all the time. Will replace half shafts and dif lube and advise results. Quote Link to comment Share on other sites More sharing options...
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