I just re-geared to 4.56 about 3 weeks ago and have about 300 miles on it with easy driving no high load. About the middle of last week I noticed a vibration around 30-35mph. It gets stronger as speed increases, but is not accel/deccel dependent(it is speed based not throttle based). I tossed it up as a bad u joint. I ended up replacing it this weekend. Now the vibration is worse. I did some searches and found a couple threads stating it could be the pinion nut has come loose. I have rechecked both pinions and they are nice and tight. I do not have a sye. I do have a tc drop though.
It is just weird that it would develop randomly when everything seemed fine.
Also I checked for axel wrap last night. There is little movement from the axel when power is applied forward and reverse. An motor & trans. mounts were replaced about 4 months ago. They do not have any cracks or tears in them either.
My plan of attack:
1. Remove front/rear ds to figure out which end it is coming from.
2. check u joints in front ds for play/slop
3. use gauge to check actual pinion angles.
Any other suggestions of what to check next or first?
It is just weird that it would develop randomly when everything seemed fine.
Also I checked for axel wrap last night. There is little movement from the axel when power is applied forward and reverse. An motor & trans. mounts were replaced about 4 months ago. They do not have any cracks or tears in them either.
My plan of attack:
1. Remove front/rear ds to figure out which end it is coming from.
2. check u joints in front ds for play/slop
3. use gauge to check actual pinion angles.
Any other suggestions of what to check next or first?