Over the last while I have noticed an occasional vibration in 1st and 2nd gears. Usually it happens on moderate acceleration, but with sustained rpm. For example, if I start in first easy on gas, then go to about 2/3 throttle up to maybe 4500 rpm and then back off letting it decelerate it gear. Today I could make it do it in both 1st and 2nd, and then it went away and was smooth. It feels almost like a resonant vibration that build when certain variable are all lined up. It does not happen on WOT, or if you shift up. It only appears to happen when you hold the rpm.

Could this be a UR crank pulley issue as there is no harmonic balancer? Anyone else with vibration problems like this? It has me a bit worried and I would like to find out what it causing this. The strangest thing is that it is not consistent... you would think that if it was a pulley issue it would do it all the time.

Any suggestions appreciated!

 

I don't sounds like you may have to reseal the crank pulley.

 

 

I had the clutch and flywheel replaced last fall. Could they have fucked up the installation?

 

what are you talking about

 

I kind of wondered about that as well... assumed that it was the keyway that he was talking about.