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I just installed an 8 3/4 with new bearing and 355 gears and at about 30 mph it shakes really bad what the heck is going on. it is real bad.
I just installed an 8 3/4 with new bearing and 355 gears and at about 30 mph it shakes really bad what the heck is going on. it is real bad.
Open gear just put it on the stands drivers side wheel wabbles.
What about your u-joints are they new or used? did you loose any needle bearings. is it properly centered? Off balance?
You can get vibration from the driveshaft also.
Another thing to check before spending any more money.
Ok wheel looks like it warped when turning, but the wheel is not swapped wheels still does it. But It looks like it is the drive shaft. Son put driveshaft on and where the u joint goes on is 4 1/4 inch which is 1 inch bigger than my u joint in width. What kind of car would this center section come off of. I have another one that is the same as my 8 1/4 was.
That is exactly how I feel right now.
Ok wheel looks like it warped when turning, but the wheel is not swapped wheels still does it. But It looks like it is the drive shaft. Son put driveshaft on and where the u joint goes on is 4 1/4 inch which is 1 inch bigger than my u joint in width. What kind of car would this center section come off of.
I have another one that is the same as my 8 1/4 was.It is a B body 8 3/4 out of 66 charger.
Are you saying you went from 7260 (small) yoke on rear to 7290 (larger) yoke on driveshaft?
I thought he was saying they put the small joint that was still on the driveline in the large yoke without noticing.
That's why I was curious about the drive shaft. If you replaced a 7 1/4 with the 8 3/4 the drive shaft, for one thing, it would be too long. It might be possible that something got forced out of shape when you put the weight of the car on it and drove it.. I would also look closely at the tailshaft on the trans to be sure it's not damaged.
There are combination U joints that will fit your driveshaft AND fit the larger yoke on the 8 3/4.