Mike's 87 Samurai is experiancing vibration in the 35-45 MPH range. I am thinking it is tires as it sort of snuk up on him, but he pulled the rear driveshaft thinking it was out of phase, he tried different positions and it made things worse. He lined back up the alignment marks and re-installed it after checking the condition of the u-Joints of course. Te Vibration is still there. I told him to change out the street tires and put his Super Swampers back on and see if it goes away, then maybe al he has to do is have his tires re-ballanced. If not, what could it be?
Any sugestions?

Mike's 87 Samurai is experiancing vibration in the 35-45 MPH range. I am thinking it is tires as it sort of snuk up on him, but he pulled the rear driveshaft thinking it was out of phase, he tried different positions and it made things worse. He lined back up the alignment marks and re-installed it after checking the condition of the u-Joints of course. Te Vibration is still there. I told him to change out the street tires and put his Super Swampers back on and see if it goes away, then maybe al he has to do is have his tires re-ballanced. If not, what could it be?
Any sugestions?

I forgot, is he running SPOA configuration? Also, does it do it only under power situation, accelerating? Did he put in a crawler geared t-case? Did he reinforce his t-case mounts?

A lot of questions, I know... but it'll help diagnosing...

-Eric

could be a wheel bearing

Problem Solved.... It was out of phase one tooth. The U-Joints must line up!

Thanks for the replys.