vibration with rpms????????????????

[redneck zx]

ok need help quick
my car shakes from 2500rpm to 4000rpms
i have replaced the transmission and underdrive pully
eney sugestions what to check would be great thankyou

[es.biggs]

What kind of shake, is it like a shake in the drivetrain/engine that you can feel? If so, I would check ignition timing. I had that problem when I first bought my car, it would shake like crazy around 2800 and like 3700. Then vtec would kick in at 4000 and it would run great.

[redneck zx]

ok we think weve figured it out
2 problams
when i hade my flywheel resurfaced they didnt balance it for some reason???????????
second i have solid aluminum motor mounts so all vibration is felt thought out my car thats why everything is breaking
ugggggh so geting new flywheel tomarow and motor mounts this week
dont put solid motor mounts in a dd its only costed me 1300 so far!?!?!?!