Shuddering front end...

[Ascinder]

I would check the usual wear items. Tie rod ends, ball joints, etc. Pretty much anything that links your steering to your wheels. The bottom line is that any forces you're feeling are going to be transmitted through those components. Another one to look at would be to see if maybe you've thrown a wheel weight. I'd also check to make sure everything from your differential brackets on out is bolted up nice and snug. How's the play in your steering wheel too, maybe your steering gearbox is wearing out.

[Triathlete]

No play in steering, not a wheel weight/balance issue (does it with both sets of tires), I have tugged on all movement parts (tie rods, cv's, etc.) and feel no play. The TOD is acting normal (80/20 split). If I accelerate hard it does not do it, if I let off the gas it stops...only does it when I accelerate normally. The front end shudders, pulling to the right (pass side) and you can feel it in the steering wheel.

Would ball joints or wheel bearings be a possibility? With the front end on jacks I don't have any up/down or sise to side play in the tire. No unusual noises, grinding, or clunking.

[circmand]

check your drive train. It may need greased and tightened.