Hi I am new here and have been reading a lot of posts on the internet but couldn't find a solution to the fix of this.
So basically I got a twin plate ceramic unsprung clutch from Xtreme and Poly Bushings all around for my track 350z 35th anniversary edition, I have got used to all of the noise and rattle coming from these mods. But there's this clunking noise from the box or the diff everytime I let off the gas then back on it at slow speed, most audible on 3rd gear rolling at below 2k rpm. Feels like the powertrain is about to fall off, and the gear **** would move back and forth a bit when performing this off gas on gas action. I have read about it being the diff has excessive backlash causing this problem but can't be sure, as I have sourced a very good mileage vlsd diff online. Does anyone here got the same problem and solved it by swapping the old diff. Car is perfect except this, which drives me crazy around the track lacking the confident to shift through the gears. Thanks in advance!

 

Check trans and motor mounts

 

All mounts had been replaced by poly not long ago. Pretty sure its not the mounts

 

Gear backlash , you can just hear it now with the bushings replaced.

 

so nothing I could do to reduce it ? Besides changing them back to rubber mounts?

 

Probably this because your stiffer bushings.

Welcome to #BecauseRaceCar