The 7AT has synchro rev and works flawlessly. I used to have a 6 man and was worried I would't like it. Boy was I wrong.

The sports mode synchro-rev is for the 6MT only, all the 7AT get rev-match even the base. There is definite value in the sport package for street driving, the LSD does respectably well, the brakes hold up.

i was wondering same about the lsd, but does any one kno if any aftermarket lsd will fit in a 370z without the sport package

yes, thats why its called an "Aftermarket" lsd :tup:

try one of these.

CARBON CLUTCH - CARBONETIC - ACROSS Official Website

oook thanks a lot

Assuming they all have the same bell housing, which I would imagine is the case as I don't think that has changed since the 350.

Here are the Carbonetic part numbers for the carbon clutch diff core.
1.5 way: ACNRB109130
2 Way: ACNRA109130

THMotorsports is running a sale on them starting Friday, although I'm sure they'll take your order now at the same price.

I have noticed my LSD gets warm and looses it "snap" after a few mins of hard driving. It really pisses me off as I am used to mechanical types like on GTR's, S15, etc.

Maybe a simple question...

Without replacing the viscous type with a decent mechanical 1.5way centre, is it possible to change the fluid to make the diff stiffer and more resilient to overheating, slipping?

It's a sealed unit, as far as I know. The diff oil is seperate from the silicone stuff they use in the diff. You could use a cooler to knock out some of the heat build up though.

how would that work for a 7at? u dont have a clutch to push down for it to signal ur about to upshift or downshift.

On the auto there is a slight delay on manually selected gear changes, but it always synchronizes the engine to the next gear.

so syncro rev actually makes a difference? lol

Thats a problem with VLSD's in general, once they heat up, it becomes an open diff. Which is why time attackers and drifters use gear LSD's, I've heard nothing but great things about the carbonetic ones, which is the one I plan on adding once I get my tax return :) You can change the silicone all day long and it wont make a difference, for every day driving, the VLSD is ok, but for sustained abuse, switch it out.

Why would Nissan put a useless viscous LSD in the Z range when nearly all previous models have had mechanical LSD's? S13, RPS13, S14, S15, R32, R33, R34, R35 ...

3 reasons.

Viscous units have better street manors because the slip ratio is high and they are silent.

Viscous units don't wear out with street driving, gear and clutch units eventually require a rebuild.

Viscous units are cheaper, an important point when your building a car for a $30K price point.

All modern automatic transmissions have this. Both the transmission and engine are computer controlled, by synchronizing the 2 the torque converter can be put into lock up mode more quickly making the car feel more responsive/connected.

The concept is simply new to a manual transmission.