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Differences In Front And Rear Diffs Between R32 Gtr & Gts4

Bozz
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Bozz Proficient

Bozz

Posted
Posted

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 Grand Master

funkymonkey

Posted
Posted

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.

blind_elk Grand Master

blind_elk

Posted
Posted

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

Cubes Grand Master

Cubes

Posted
Posted

Stumbled upon this a little while back.

Gearbox ratio's.

Note the RB26 gearbox has longer gears everywhere. :P

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.

post-382-1192836388_thumb.jpg

heller44 Mentor

heller44

Posted
Posted

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.

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