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R32 Gtr Gearboxes

R32 Man
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Fitzpatrick Speed Works Mentor

Fitzpatrick Speed Works

Posted
Posted (edited)

4th commonly wears out the synchro, however the biggest problem is actually third gear when you have some power people shred the gear to pieces. Nissan made an error with third gear counterweight and when shifting quickly 3rd doesnt engage the gear completely and shears off the end, very normal for gtr gearboxes. They are like any other gearbox really, often arent serviced, often abused, and used on cars with power outputs well outside what they are engineered for, in saying those points I think they stack up well.

Sorry to hear yours is stuffed probably better off fixing the one you have though and rebuilding it rather than going second hand at least that way you will know exactly what you have, a new gearbox essentially.

Cheers

Edited by Fitzpatrick Speed Works
benm Grand Master

benm

Posted
Posted

monga:

How much torque do you have?

Flat shifting or normal?

What clutch setup?

Seems abit weird that some people break multiple boxes and others never break anything, then again I am known to granny shift at the drags. My other gtr has brand new 2-3-4th syncro's so hopefully that will hold out for a couple of years.

monga Experienced

monga

Posted
Posted

Not sure dude about the torque, I'm running 120mph at the moment at 16psi and I'll be putting a tune in shortly with 21 psi so abit of torque would be getting made

First time I shifted like a animal and the syncro's were shagged

Second time the damage was done at the drags shifting abit faster than normal and dropping the clutch abit to quick

clutch setup is a exedy twin plate, first time round it was a hks twin plate

This third box I've had for awhile now and change like a granny and its being great, once the gear is engaged nothing should blow up its getting it in there that is important

MANIA Newbie

MANIA

Posted
Posted

Hi Guys I have also failed 5th in my r32gtr has anyonone got any heads up on what might be wrong inside? I can put it into 5th sinchros dont feel nice and there is no drive once in 5th all other gears work fine. Does anyone know who can repair these in WA? And what costs may be involved.

I have a exceddy twin plate clutch and 500hp at the treads

Also i have been tossingup a few options for upgrade has anyone atached the ikeya sequen shifter to these boxes or heard of any feedback on the product.

any ideas or feedback would be much appeciated

Kranker Collaborator

Kranker

Posted
Posted

Now my gearbox knowledge isnt great by any means...

But ive been reading a couple of threads about the GTR 5 spds breaking gears, and it seems that one common link is an Exedy twin plate clutch....could be a factor...dunno....just throwing it out there.

If it is a super aggressive clutch could be hard on a gearbox (i dont know, i havnt used one). Maybe usnig a weaker less aggressive clutch and having it act like a fuse, i.e. it breaks so that it saves the gearbox. From memory thats what Subaru did with the WRX, they gave it a piss weak clutch to save the 'box. Couple of hundred for a clutch is better than a couple of grand on a new 'box.

No science or facts behind this, just an interesting common link and idea. Also helps running some top quality gearbox fluid.

There are also a clouple of replacement gearsets available from OS Giken, and the is an Aussie company aswell, dont remember off the top of my head.

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