Differences In Front And Rear Diffs Between R32 Gtr & Gts4

[Bozz]

I'd like to know if the front and rear diffs are the same ratio difference between GTR and GTS4? I recall the GTS4 rear was about 4.3 and GTR rear was 4.1

What about the front diffs? If they are 4.3 and 4.1 respectively, this means a GTR box will fit, yes?

What other differences are there, are the ratios the same or different?

Any other info I may need to know?

Cheers

[funkymonkey]

Front and rear diffs are 4.3 in a GTS4. GTR boxes do fit into a GTS4 with no problems, final drive ratio gear needs to be changed tho from the 22 tooth GTR one to a 21 tooth GTS4 one... or something like that.

[Bozz]

So that means the front diff is the same for both and they use a different transfer case ratio. Slack bastards!

[blind_elk]

No. The ratio of the front diff is the same as the ratio of the rear diff. Otherwise, the front and rear axles would be driven at different speeds.

What funky means is that the speedo drive gear needs to be changed (as I have just done after I put a Stagea diff set @4.083 in my GTS4 - GT-R drive gear replaced GTS4 drive gear)

GT-R = 4.111, GTS4 = 4.375

[funkymonkey]

ah whoops... yeah i meant the speedo drive gear

[Bozz]

Thanks, good stuff!

Cheers

Edited October 18, 2007 by Bozz

[heller44]

blind_elk, did going to the stagea diff sets give your car much longer legs?

Still got the original ratios in mine and you know how it revs at 110.

[NXTIME]

blink_elk. Do you still have the 4.3 GTS4 diff ratios?

[blind_elk]

heller44 - I think it runs around 2900 at 110

NXTIME - only have the front gearset (managed to sell the rerar set)

[NXTIME]

heller44 - I think it runs around 2900 at 110

NXTIME - only have the front gearset (managed to sell the rerar set)

PM sent

[Cubes]

Stumbled upon this a little while back.

Gearbox ratio's.

Note the RB26 gearbox has longer gears everywhere.

You can work out the diff ratio via the speedo drive tooth count.

As others have said 21 = 4.363 (gtst) & 4.375 (GTS4) and 20 = 4.11 (GTR etc)

20tooth is also used for the 4.08.

[heller44]

Interesting. Can you remember seeing a parts code on the outside of the gearbox referring to what model it is?

Bit of a pain getting under my car without throwing it up on ramps.