Originally Posted by tiguy99

What do you mean doesn't work? Can you elaborate more? What are the symptoms?

Originally Posted by Mustlistenfc

When I increase RPM really quickly (when driving in a straight direction) and lose traction, the rear side of my car swirves to the left or to the right.
Is it even possible the VLSD to break?
Also, I noticed I don't have much grip left on my tires... Does that make a difference?

Originally Posted by Mustlistenfc

When I increase RPM really quickly (when driving in a straight direction) and lose traction, the rear side of my car swirves to the left or to the right.
Is it even possible the VLSD to break?
Also, I noticed I don't have much grip left on my tires... Does that make a difference?

Originally Posted by aarantes

I hope this is a joke

Originally Posted by Mustlistenfc

I understand the car would swirve a little bit when the tire has little grip but with VLSD shouldn't it keep the car straight?

Originally Posted by Z04

LSD is only useful in curves, not the straights. if you are losing traction while going straight it is your tires

Originally Posted by scotts300

I'm at 55k, and Nissan FINALLY agreed to replace my aging VLSD. It's a long story, but my car will burn the inside tire during a slightly aggressive turn. The local dealership said I was overdriving the car, and that what I was experiencing was normal. I refused to agree.

The final word from NNA was that the differential had to be able to hold 90#-ft of torque with one wheel fixed/on the ground. I've tried this at home many times, and the breakaway torque is about 5#-ft. The Z goes in Friday for them to confirm the breakaway torque of my diff, and replacement from there.

Originally Posted by Gsedan35

Remember, VLSD does not prevent wheel spin from occurring. Once a wheel spins free, the viscous flud attempts to rain in the offending wheel by offering what the tech say's is 90 ft lbs of torque. It is not a proactive system like other LSD's. Since it's on topic I'll cut and paste the following post of mine.

The VLSD unit consists of stacks of thin plates with holes or slots, all suspended in a special silicone fluid. They have no clutches to wear out, and locking characteristics can theoretically be changed by varying fluid viscosity. Generally, however, these units are non-serviceable, and require no special maintenance. As the differential spins, the plates shear the fluid up to a point, after which the fluid provides some resistance to shear, allowing 15-25% torque transfer to the other wheel. The downside is that these units don't act like a limited slip until one wheel actually starts slipping (i.e., they don't prevent slippage), which means the VLSD action often kicks in after you've already exited the corner. Compared to the proactive nature of the Torsen LSDs, the VLSDs are reactive units. They do not prevent slippage, they merely sense differences in rotation, not torque. They also don't allow for very much torque transfer, compared to mechanical or clutch-pack LSDs. They do still work well for starting from a dead stop in slippery conditions. It is important to note that VLSDs locking characteristics occur both during acceleration AND braking, as it can't tell the difference between the two, but merely reacts to the rotational speed differences between the two drive wheels.