So my XJR has developed an odd ailment. Car is an 03 with 105k on the odo, front end was rebuilt about 10k ago (new upper and lower ball joints, poly bushes, new outer tie rods). Driving on a fairly flat freeway at 75mph or so you will feel the slightest shimmy with the wheel. No noise just a little movement to the side. If you take your hands off the wheel you can just watch the wheel bob a bit and it feels like one of the tires tries to go a little bit on a dif direction. Put the car up on stands and couldn't find any play anywhere. No noises or clunks. Thoughts?

 

Almost certainly a tire/wheel problem. Out of balance, or a bent wheel, or a faulty tire.

Swap tires front to rear. Does the symptom change?

Cheers
DD

 

Naw tires and wheels are good. I found it. Seems the one track rod end has quite a bit of play in it but only when it warms up. First time I jacked it up it had sat long enough to cool down. Ordered a Moog from Amazon to replace it since as I said the oem lasted maybe 10k miles and 2 years. Boot looks horrible on it as well.