R33 Gtr Diff Gear Change

[peter_fc]

Guys,

Looking to change the gearing on an R33 GTR and wasn't sure if:

1. Are gears available for this model and where can i get some.

2. Does the front diff gearing need to be changed also to suit the rear?

Any help would be greatly appreciated.

Cheers

[Piggaz]

IM pretty sure you can use the GTS4 gears. They are shorter!

Yes the front must be changed to suit the rear.

[Pezhead]

You have to be careful about changing the ratios. I believe a stock R33 GTR has 4.11 gears. I think that the GTS4 has 4.30.

My GTR ended up having rears at 4.30 and fronts at 4.11 - and that stuffed my transfer case real good. I had to change it out to get it back to stock. I had a shop do it. Rear would be relatively easy. But the front is a real bear since it is attached in the transfer case and oil pan.

[Beer Baron]

the only real viable option is r32 GTS4 gears. 32 GTS4 is actualy 4.375:1 and yes you need both front and rear crown wheel and pinions. they are a good upgrade from the GTR 4.111 gears. and they are not easy to find!

[peter_fc]

I was thinking more along the lines of 3.9.

is there anyone who sells front and rear gearsets?

[Beer Baron]

ah, well if you want to go that way then R34 gears are the way to go. but to be honest most people want more acceleration/less top speed. going to 3.9s will give you more top speed but cost you acceleration. considering with the stock gearing you can get to 300km/h (which without decent power you'll never see on any aus track) then i'm not sure what you want to make it even higher still?

you may need to confirm though that the 34 crown wheels and pinion gears will work with your 33 diffs. i'm not sure as I've never heard of anyone actually wanting the 3.9 gears. unlesss you live neat the autobahn and want to play with some ferraris and lambos!

[Raysboostin]

ah, well if you want to go that way then R34 gears are the way to go. but to be honest most people want more acceleration/less top speed. going to 3.9s will give you more top speed but cost you acceleration. considering with the stock gearing you can get to 300km/h (which without decent power you'll never see on any aus track) then i'm not sure what you want to make it even higher still?

you may need to confirm though that the 34 crown wheels and pinion gears will work with your 33 diffs. i'm not sure as I've never heard of anyone actually wanting the 3.9 gears. unlesss you live neat the autobahn and want to play with some ferraris and lambos!

i'm go out on limb here here and guess he's after highway economy. not everyone is after crazy acceleration. i've had the same idea

[peter_fc]

Cheers for the info.

The car is well, well into 5th down the straight at eastern creek and thought of running different gears to see if i could bring it back slightly.

Thanks for the help.

So the R34 has 3.9 gears?

Cheers

[Piggaz]

3.545's the R34 GTR ratio's are

[R31Nismoid]

Ye 3.5 or 3.4 was what i thought it was closer too due to the Getrag and the 6th

[Marco-R34GTT]

you may need to confirm though that the 34 crown wheels and pinion gears will work with your 33 diffs. i'm not sure as I've never heard of anyone actually wanting the 3.9 gears. unlesss you live neat the autobahn and want to play with some ferraris and lambos!

I'm getting a 3.6 final drive put into my R34GTT, I do HEAPS of highway and freeway driving, so I can justify doing it... I'll find out how it goes when I pick it up tomorrow..

[Marco-R34GTT]

Hahaham I've been to a few different websites, and I've recovered a range of 'different' final drive readings:

3.55

3.545

3.369

3.27

3.266

I'd like to know, which bloody one is actually correct...