Horrible Shudder Under Acceleration.

[D.I.Y. Mik]

I just installed a solid gearbox mount, as the old one is starting to peel.

Its horrible and noisy as youd expect, however there is a serious shuddering when i accelerate.

Its almost as bad as if it was misfiring.

I think it was there before but i never felt it. I dont think its normal.

Its an R32 gtst, rb20det, manual box, single piece tailshaft, recent clutch change to exedy heavy duty, flywheel machined etc, gearbox is a bit ratty, diff is bad too.

Also just installed a braided line from clutch master to slave. There was no damper in the old line.

Just ordered the Nismo mount, but if theres a problem it might wreck that mount too. And my new engine mounts. (maybe its why all my old mounts were stuffed)

What is it? Any educated guess is welcome.

[niZmO_Man]

Tailshaft wobbling.

Rear cradle bushes flogged out.

[GH05T]

i would have shot streight to unijoint but being a single peice thats obivously out..................new reply.............beat me to it.

[Ishman]

My R33 GTR is in the shop right now with shudder problem when accelerating- seems to happen most when feeding too much gas before boost comes on= more torque, then increases with revs so have to back off . Guys thought it may be main bearing for rear diff. or engine/gearbox mount (forget which) They put it on the dyno and front left wheel started to shudder, so diagnosis was replace whole front left CV shaft.

[D.I.Y. Mik]

Fairly new tailshaft with BIG unis. Solid cradle shim thingys.

Good point Isha, it could be an axle or bearing.

It almost feels like the crankshaft, but i cant tell just by listening.

Would a tiny bit of air in the clutch line do this? it feels ok, but it did get changed just before.

[speeddemon778]

Hey guys just been reading this thread and i'm having a similar problem with my s2 R33 when I accelerate it goes sluggish and shutters like mad, its becoming more frequent, anyone able to point me in the right direction or have any suggestions?

[GTSBoy]

Clean your AFM.

[D.I.Y. Mik]

Fairly new ( 6 months ) z 32 afm.

Fixing the diff ( award diff & gearbox ), ill see if that helps.

[GTSBoy]

I was respondnig to speeddemon.