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Converting R32 Gts4 To Gtr Box

MADGT4
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MADGT4 Mentor

MADGT4

Posted
Posted

Just wondering if there are any difficulties in doing this job?

I have been having trouble with 4th gear for a while now and after reading over the RB20 Box thread beleive it to be the 4th gear syncro.

Now would anything need to be changed re: Push to Pull clutch? Diff's?

This is something i'd like to look at doin even if the box is still alive as i would like it to be strong but i don't have the option of going to a RB25 box even though the GTR box is very similar.

Any help would be appreciated.

Cheers

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Medium Dave Proficient

Medium Dave

Posted
Posted

As far as I am aware the two gearboxes are the same except for the input shaft, ie same strength... This is part of an email I recieved from daniel at fitzpatric speedworks:

If manual the gearbox will take it no probs they are basically the exact same as a gtr except the input shaft size and this isnt where the weakness is, but a gts4 box will be fine for 250rwkw as long as you respect it and dont flat change or violently drop the clutch etc

Hope this helps ;)

Stronzo Collaborator

Stronzo

Posted
Posted

hnr32 (gts4) and previous-term bnr32 (gt-r) boxes are both push-types, from 1993 all bnr boxes are pull-type.

There is a difference in gear ratios -- bnr box has 1,2,3,5 gears "longer" cause it is more suitable for high torque engine.

afaik both boxes are equally strong and there is no differences in reliability.

p.s. since bnr32 and hnr32 have different final gear ratio -- they should have different speedometer gears in transfer case and different speed sensors. i`m not sure -- it is wise to check it with NISSAN FAST.

MADGT4 Mentor

MADGT4

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Posted (edited)

As i'm "PLANNING" a rebuild with Cams, Cam Gears and a 2530/5 with the rest of the supporting goods would it be safe to say the GTR box would be a good option then with the added power/torque (as far as dealing with the ratios)?

As i know the ratios are different because i'd be lucky to get 45-50km/h tops out of 1st in my GTS4. Now i'm not after some stupidly high 80km/h in forst or anything.

Im just after something with a little taller ratios thats all?

Any opinions?

Edited by MADGT4
Ruffels Veteran

Ruffels

Posted
Posted

im fairly sure my R32 gts-4 has a gtr box in it.. but it was put in when my gts-4 was converted from auto to manual.. mot likely in japan

anyone wanna varify if this is a gtr box or not

boxbox.JPG

-Ruffels

gts4diehard Rising Star

gts4diehard

Posted
Posted (edited)

You won't be able to tell from the outside, the box casing is the same and as far as I know the numbers are too. The only way will be to check the speedo against a gts4 with a gts 4 box or jack the car up, car in 1st, wheels off ground (supported by stands of course) and turn the engine over by hand and count how many times it takes to turn the prop shaft 1 turn - and compare against the gearbox ratios of the two boxes.

Edited by gts4diehard

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