[Mike Voth]

The Monte has developed a very bad vibration in high gear. Changed driveshafts and the problem seemed to lessen temporarily, but it's back as bad as before. The driveshaft is straight. Dad can barely hold the shifter back in 4th as he crosses the finish line. We are taking the tranny apart to see if the mainshaft is bent or ???. Can a ring gear be out of balance? We are sending the clutch and disk away to get balanced. Axles ???.

Any help would be appreciated as we're really scratching our heads on this one.

Many thanks in advance!!