what could be the problemwith my driveshaft?

after lifting my fj60 about 5-6" i had to put cv on t/c side of rear shaft. the pinion was lifted already and it came out to be poined straight at the t/c.
i still had some vibration.
i checked the flange nut and it was a bit loose.
i fixed that. and now i still have vibrations that starts after 55-60mph. just like it was before i tightened the nut.

my question is. the driveshaft looks parallel with the pinion now.
how many degrees of a difference i can have in that point?

and
when i took my flange off of the rear pinion, i could move the pinion in out side to side and everywhere. is that bad?
i just never took a diff apart
thanks alot
mike

The pinion movement is the first thing to check....my suspicion is a bad outer pinion bearing. Easy fix tho, just pull the nut, tear out the seal, pull the bearing and drop in the new bearing and seal. My first guess, and a relatively easy/cheap fix too.

If you can, pull the race too. Gonna be hard to get out from the front, but possbile.

I agree with Woody. I had to do that to the Cruiser a while back. getting the race out was a pain in the ass!! Slide hammer and lots of patience and it was done.

Also shouldn't the pinion be pointed like 1 or 2 degrees lower than the t-case yoke? I don't know if that will cause that much of a vibration but it's something to check.

Your pinion angle is not that critical since you're using a CV joint., But it may be a bit too hight, you can try installing some shims to lower it a few degrees.

I'd guess that you have a bad pinion bearing as well, but could also be a bad U-joint, or output bearing on the T-case.

How about the driveshaft, are the yokes in phase with each other? However, if they were not, you'd most likly have bad vibs ate all speeds.

Jeff

both bearings r good-- no play when the flages r on.
the yokes r in phase.
i have a cv on longer side and its connected to the t/case
the ujoint on the other and its connected to the pinion
i have lifted the pinion in order for it to be in line with the driveshaft. at the t/case the driveshaft goes down with some angle.
the ujoint seems fine too.

what should i do?
please help
thanks for any input

If you have ruled out all of the other stuff mentioned above, get a magnetic angle finder and determine what the angles of your drive shaft and 3rd member pinion are. CV joint shafts are designed to work with zero angle at the pinion/rear shaft joint. The larger the angle, the more vibration there will be but I would guess that it would have to be more than 10 degrees to have significant vibration. Was the shaft balanced?