So heres the problem:
There is a mechanical grinding/crunching noise in all gears at certain rpm. Only happens under load, does not happen when in gear with no throttle. Happens at:
1st gear : ~1800-2300 (hard to tell as its not very loud, only happens under med load)
2nd gear : 1400-1900
3rd gear : 900-1500
4th gear : <1500
5th gear : <1500
Car is a 97 gts-t, with standard box. Upgraded clutch.
Does not change with respect to oil temps. Noise is louder in higher gears, and when under a greater load. Spoke to a few mechanics and each has their opinions. Drive shaft bearing, gearbox on its way out, a vibrating plate or something somewhere along the exhaust, or even the clutch springs due to their stiffness under a certain load. Anyone had similar symptoms on the r33?
Any help appreciated. Cheers, Rob