Hi, need help diagnosing a front end vibration. 2003 FX4 Off Road with automatic
Symptoms: If I accelerate from a stop while turning right or left I get a noticeable shuddering/vibration that continues up to maybe 15 mph. Once rolling it is perfectly smooth in straight line or turns. Replaced front u-joint on the rear driveshaft, both hub bearings and both cv shafts. Now it's worse. I'm out of ideas. Any help appreciated. Thanks!

 

Quick update: Replaced both lower ball joints. Uppers OK. If anything it's worse and I'm running out of things to replace. Please don't tell me it's the front diff!

 

Bushings?
Cascading engine/trannie mount failures?
Is this shuddering/vibrations felt in the steering wheel? ...throughout the vehicle?
Something weird in the rear end?

 

Checking the rear diff right now. It occurred to me that it could out of oil - 247K on the clock - and the anti slip is chattering. That could explain why is seems to happen only when turning out of the driveway etc.

 

Local mechanic told me to check diff fluid levels. Front diff was way low. Topped it off and added friction modifier. All good now. Who'd a thought!