Lunar240z Posted October 28, 2005 Share Posted October 28, 2005 I just picked up an VLSD R230 from a 300zx TT, {$50 bucks} and the previous owner said that it made noise that sounded like it was worn out when he downshifted on the freeway, and dropped the clutch hard. He also said it drove fine around town... There seems to be no apparent damage to the gears, and there wasn't a lot of metal on the magnetic plug, so I'm thinking [hoping] it's just the bearings, or maybe even just that it needed new oil, anybody have any ideas about this? I've also heard about the viscous lsd fluid wearing out too? Could that be causing the noise? Quote Link to comment Share on other sites More sharing options...
Lunar240z Posted October 29, 2005 Author Share Posted October 29, 2005 Should i just replace the bearings anyways?, the diff is 12 years old after all... Quote Link to comment Share on other sites More sharing options...
jbc3 Posted October 29, 2005 Share Posted October 29, 2005 Mr downshift and hard launch may have been a little hard on the rear. While you have the rear open, go ahead and put marking compound on the gears and see what type of pattern the gears give you. Hopefully the pattern matches the wear pattern. This should help you decide if the set-up is fine and the PO didn't perform an unsuccessful repair. If the patterns are good and the torque on the mains and pinion are fine, the bearings may need replacing. Replace them all. Quote Link to comment Share on other sites More sharing options...
Lunar240z Posted October 29, 2005 Author Share Posted October 29, 2005 apparantly the PO didn't even try to fix it, he just elected to repalce the whole diff. he did't want to get his hands dirty i guess.. marking compound= layout blue? and i'm just looking for an even wear pattern on the gears right? should i do all the gears on the inside of the limited assembly too? Quote Link to comment Share on other sites More sharing options...
Lunar240z Posted October 29, 2005 Author Share Posted October 29, 2005 I got this descripton of the problem from the P.O. "when i had the lsd on the car it when driving normal and release the clutch slow its normal. but when shifting fast and release the clutch fast. i hear a noise in the back of the car. its like an end lift or something. i don't know the what they call it when the lsd is worn out." You guys think replacing the bearings will fix this? Quote Link to comment Share on other sites More sharing options...
Tim240z Posted October 29, 2005 Share Posted October 29, 2005 Sounds like bushings were/are bad? Quote Link to comment Share on other sites More sharing options...
DaEvil Posted October 29, 2005 Share Posted October 29, 2005 did you get the out put shafts with it ? They are special for the VLSD Quote Link to comment Share on other sites More sharing options...
jbc3 Posted October 29, 2005 Share Posted October 29, 2005 Gear marking compound is a white or yellow paste that you put on a few of the gear teeth and turn the pinion to rotate the ring a couple of times. Make sure you have someone creating pressure on the axle flange so the gears press tightly. The pattern can tell you if the set-up is correct. You can find the proper patterns on line. If the PO never fooled w/ the rear the bearings could cause the problem. Good luck, Jody Quote Link to comment Share on other sites More sharing options...
Lunar240z Posted October 30, 2005 Author Share Posted October 30, 2005 glad to hear it could be the bearings... I've got the shafts, and it also came with a 300zx subframe...i'll probably sell it, if i don't need it to mount the diff. Quote Link to comment Share on other sites More sharing options...
Lunar240z Posted October 31, 2005 Author Share Posted October 31, 2005 Sounds like bushings were/are bad? Do you mean the BUSHINGS are bad, the ones that hold the differential to the subframe? I mistook that for bearings... those are 30 bucks lol... i'll check the pattern of the gears while i have it open just in case... Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.