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R34 25GT-FOUR

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in R Series (R30, R31, R32, R33, R34)

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R34 25GT-FOUR

Hello everyone, i have been looking up some information on a R34 25GT-FOUR that i might be buying soon, the question i'm trying to find an answer to is the AWD system, is a the same setup as a torque split or is it always in 4wd mode. A few sources have said its always in 4wd mode and others say its 2wd until traction is lost. What makes it more confusing is that it is running a R33 RB26DETT engine with a R32 gearbox.

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KiwiRS4T Grand Master

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The R34 atessa is always on - supplying 5% to the front until the computer tells it to increase it.. Despite the fact that it has an R32 box (why??) it will not behave like an R32GTR where you can disable the awd by pulling a fuse. If you want 2wd you can drop the front driveshaft or there is there a procedure you can go through which is not simple.

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Awesome, thanks. I'm not to sure why it has a R32 gear box, it used to be a RB25DE auto and has been converted to manual, which also brings up another question. At the moment the speedometer is not reading the correct speed and the cluster is still the auto cluster, replacing the cluster with a manual wont fix the speedometer problem? I'm assuming that ill need to get a speedometer corrector installed.

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dr phil Collaborator

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Probably the speedo is wrong because the speed sensor pinion from the gt four wasn't fitted into the R32 gearbox. The gt four has 4.34 diff gears, whereas gtr has 4.11, so you need to use the correct speedo sensor pinion.

I have a R33 gtr gearbox in my R34 gt4 - in fact you can swap an auto 4wd gearbox speedo sensor into the manual box. This is what i did.

In other words, you need the R34 gt four speed sensor, to match your diffs. Note that I'm assuming the car has kept the 4.34 diffs, not swapped to 4.1. Either way, they just have to match.

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dr phil Collaborator

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I have read varied opinions regarding whether the factory electronic sensor from R33/R34 will or won't fit into the R32 box. I haven't tried it. Did some research though, the speedo drive gear on the output shaft is the same, R32 to R33. I think even the rear housing is the same.

Also, correcting myself from above, GT four is factory with 4.363 gearing.

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