vlsd problems - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

rampid360 · 07-06-2002, 06:34 PM

Ok, just bought the car...it came with vlsd <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt='

'>    Of course every bit of good luck i have is overshadowed by bad luck...so, I have problems with it already.

During normal driving conditions, there is no problems works fine.  But when I really gas it, theres this knocking/tapping/grinding noise that comes form the diff while the car is under heavy torque (off launch)  and it does it between shifts  (Yes...its a F&#King slushbox...)  

Heres what I can tell you.  It did it when I bought the car, so i decided to change the gear oil.  I know it needs special oil...and someone mentioned that it had chunks of silicone floating around it in.   When I drained the oil, it looked a little used, but not really bad.  There were no chunks of anything in it.     When i replaced the oil, I couldn't find any specific oil for vlsd...But i found a bottle of "limited-slip additive"   Which you pour in with your regular gear oil.   Again, no chunks of silicone or whatever.

I also drained and changed the ATF

Can someone clear this up for me?  What is the oil supposed to look like?  If i have the wrong stuff in (and if the wrong stuff was in from before) would it cause this noise?  Would it cause serious damage?

Im leaving for michigan in a few days and wont be able to work on the car up there.  Its as if my whole drivetrain (cept engine) is just fucked..someone help!

Thanks in advance,
-Al

AKADriver · 07-06-2002, 06:48 PM

The VLSD doesn't require LSD additive.  LSD additive is for clutch-type LSD's.  The viscous coupling inside is sealed and filled with a silicone fluid.  If the vicsous coupling breaks, it can't be rebuilt.

Other things could cause a noise like that, though.  Improper sideloading of the gears, U-joints, CV joints.

07-06-2002, 06:34 PM	#1
rampid360 Zilvia Junkie Join Date: Jan 2002 Posts: 328 Trader Rating: (0) Feedback Score: 0 reviews	Ok, just bought the car...it came with vlsd <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=''>    Of course every bit of good luck i have is overshadowed by bad luck...so, I have problems with it already. During normal driving conditions, there is no problems works fine.  But when I really gas it, theres this knocking/tapping/grinding noise that comes form the diff while the car is under heavy torque (off launch)  and it does it between shifts  (Yes...its a F&#King slushbox...)   Heres what I can tell you.  It did it when I bought the car, so i decided to change the gear oil.  I know it needs special oil...and someone mentioned that it had chunks of silicone floating around it in.   When I drained the oil, it looked a little used, but not really bad.  There were no chunks of anything in it.     When i replaced the oil, I couldn't find any specific oil for vlsd...But i found a bottle of "limited-slip additive"   Which you pour in with your regular gear oil.   Again, no chunks of silicone or whatever. I also drained and changed the ATF Can someone clear this up for me?  What is the oil supposed to look like?  If i have the wrong stuff in (and if the wrong stuff was in from before) would it cause this noise?  Would it cause serious damage? Im leaving for michigan in a few days and wont be able to work on the car up there.  Its as if my whole drivetrain (cept engine) is just fucked..someone help! Thanks in advance, -Al __________________ For every winner there are dozens of losers.  Odds are you're one of them.

07-06-2002, 06:48 PM	#2
AKADriver Post Whore! Join Date: May 2002 Location: Springfield, VA Age: 43 Posts: 3,518 Trader Rating: (1) Feedback Score: 1 reviews	The VLSD doesn't require LSD additive.  LSD additive is for clutch-type LSD's.  The viscous coupling inside is sealed and filled with a silicone fluid.  If the vicsous coupling breaks, it can't be rebuilt. Other things could cause a noise like that, though.  Improper sideloading of the gears, U-joints, CV joints.