Noise In Reverse

[Pezhead]

Hey folks,

I have a steep driveway and had to reverse up it yesterday. The 4WD kicks in but then makes a vibration and noise whenever the clutch is disengaged and power applied. It is very odd, it never does that in forward motion.

Hard to tell where it is coming from as the vib transfers through the frame.

It's an R33 GTR V-spec.

Would like to hear other's thoughts.

thx

[R33_Rob]

is it like a whirring sound?

If it is then i think its normal cause alot of cars ive driven/been in make that sound

[Pezhead]

Naw, I know the noise the straight cut reverse gears make. This is a big vibration that sounds like something slipping. It is when I slip the clutch to get power and 4wd kicks in. But like I said it doesn't do it in fwd motion only reverse, so I don't think it is the clutch.

Almost sounds like grinding but kind of muffled.

I'm puzzled.

[R33_GTR]

ive gt an r33 gtr vspec, i also have steep driveway and when i reverse there is also a grinding sound from the gearbox, makes me feel like the reverse gear is going to let go, it doesnt happen when i can build up momentum. ie i have to quickly reverse on the flat garage surface and the its fine on the steep driveway. also my car has an exedy h/d clutch

[some_cs_student]

I have a non-V-spec R33 GTR so when reversing up the driveway the car shudders but that was previously the mechanical diff.

When going both forward and (possibly) a little louder when reversing I get grinding and sometimes vibration from the front but...not sure if its normal or not.