Odd Problem, Shifter Shakes When Torque Goes To Front

[jdmsomething]

Hey,

I have a 1996 R33 Series 2 GTR. I am having a weird issue, and not sure how to diagnose. When accelerating hard and the front torque goes past 10 KG*M (as shown on the stock GTR Gauge) the shifter gets a crazy side to side wobble, and you can feel it throughout the car. I tested different things, and it only happens when the torque is being sent to the front.

Any ideas as to what could be causing this issue?

[sydking]

id start with diagnosing the ATTESSA and work from there.

read ECU flashes in the boot, Or get it hooked up to a consult.

Edited July 31, 2012 by sydking

[jiffo]

Check the unis on the front prop shaft.

[GTSBoy]

And of course, check engine mounts, transmission mount.....

[Moodles2]

Front diff and transfercase might be overdue for a fluid change.

I have a feeling it's one of the above, front diff might be seized and the transfercase (attached to the gearbox) is shaking violently as it trying to force power to the front. Or a problem with the clutch packs in the transfercase. Or something simple like a bent/loose driveshaft that drives the front etc.

[scotty nm35]

Try another matched set of tyres first, as if the fronts are slightly larger or smaller rolling diameter shuddering can occur.