Quick question hoping to find an answer. I have shake in my drive line it appears to come out around 48-55 and just around turns mostly. I have a 4.5"lift TC drop case no SYE all new ZJ front steering, new double sheer track bar. All the bolts have been checked and tightened if needed. I have had the wheels rotated, balanced, and front alignment within the last 2 months.

Any ideas to what the issue could be.

 

If it's an actual drive line shake and not shimmy, I would check all your U Joints. If U Joints were good I might entertain the thought of an imbalanced prop shaft.

 

If you have not cleaned your jeep in a while it could just be dirt caked your wheels or drive shaft. I had shakes at the same speeds until i power washed it.