Automatic 4.3:1 diff instead of a stock 4.11:1?

[T0nyGTSt]

Is this a good idea?

I know why it would be a useful.

Is the auto still LSD?

Will fuel consumption suffer?

T.

[FATGTS-R]

I would assume the auto diff is LSD, but dont rely on that.

Fuel consumption I imagine will increase on the highway at a minimum. As you will be at a higher rpm to sit on 100km/h than with the 4.11. I have a 4.33 in my R31 and it sits just under 3,000rpm to do 100km/h.

Also understand that your speedo calibration will end up being incorrect. The speedo reading will be higher than your actual road speed.

But if you have aftermarket rims that have a overall bigger diameter than the stock rims they might cancel each other out and the speedo might be very close.

Just get it checked next time you are on a dyno.

[Abo Bob]

I don't know about 33's and 32's but in the 34 the auto diff is a viscous LSD and the manual is a helical LSD. The ratios are both difference too I think.

[Fly_With_Sky]

im pretty sure the r33 autos have a viscous lsd also (not sure bout 32).

the rpms in auto r33's from my experience sit on about 3 000rpms at 120km/h

[knore]

yeh its LSD in auto 33s too

[WazR32GTSt]

and its an LSD in the auto R32GTSt as well...

[SS8_Gohan]

I don't know about 33's and 32's but in the 34 the auto diff is a viscous LSD and the manual is a helical LSD.  The ratios are both difference too I think.

For manual R34's, between Series 1 and 2, the LSD changed. And i can never remember which way I think it went from Viscous in Series 1 to Helical in Series 2. I've got a 50/50 chance

cheers.