Vibration In Fifth Gear Above 110Kph

[Bloodnut]

Hi All,

I posted a similar topic to this ages ago and the replies I got back were saying it could be the uni joints or the diff (maybe a bearing), both of which the guys at Autoworx (WA - where I bought the car) said were fine.

Now I have isolated it to fifth gear, in that for the same speed (say 110kph) it doesn't do it in 4th.

Basically getting a fair bit of what I'd call a rumble (not so much vibration because I dont really feel it in the steering) that comes on quite noticeably at 110kph, and is non-existent at like 107kph. Higher speeds it is there but it seems to be most noticeable around the 110-120kph range, and is mostly noticeable when I ease off the accelerator. My guess is that its something to do with the particular revs it is doing at 110kph (pretty much dead on 3000).

Car is completely stock (S2 R33 Gtst 1997) and has done 80000ks. Just wondering if it is something to look into. Seems to be getting worse, but very slowly.

Any suggestions?

[turboedsloth]

Does it do it at those revs in 1st,2nd and 3rd also? Have you had the gearbox out lately?

[Bloodnut]

Does it do it at those revs in 1st,2nd and 3rd also? Have you had the gearbox out lately?

Hey sorry for the late reply. Nah doesnt seem to do it in any other gear - well, not noticeably anyway. And no the gearbox hasnt been out since I've owned it (about 14 months). Hmm.... Autoworx are looking at it now.

[T-Rex]

Hey mate i have a similar issue in my 32 GTR, but it does it in 4th gear also. It sounds a lot like if the exhaust was vibrating on the chassis, but its not. At this stage im lead to believe it is a bearing problem from within the gearbox. If i load up the box by accelerating or holding a constant speed the noise is almost non existent, as soon as i let off the throttle the noise appears. I have done a lot of searching myself and my next move is to remove the gearbox, get it inspected and parts replaced as necessary.

cheers

[rickr333]

Did u end up getting the box out for a checkn?? my 33 has suddenly developed the same problem