Vibration at speed

JLEMON228

MEMBER
JEEP CHEROKEE

When i drive at speeds over 100kmh i get a vibration throught he whole vehicle. I've replaced the tyres with brand new ones, i've swapped over full wheels with a mate's Jeep. I've had the tail shafts balanced. I've had the rear diff reconditioned. The suspension has been checked by Pedders (bloke i know there). There is a CV or something in the front tailshaft that was replaced. I have replaced the gearbox mount. I have ordered new front rotors as mine are in need of replacement
I am lost for ideas. Can anyone help please ???
1996 XJ Cherokee Sport - 4L Auto.

2 Replies

RASMATAZ

MECHANIC
75,992 POSTS

100kmh/62 mph

New tires were they dynamically balanced/lug nuts tighten to specifications. Could be an engine/tranny mounts loose.

An out-of-balance tire and wheel will typically create a vibration or shake that becomes progressively worse as the vehicle speed increases. The speed at which the vibration first becomes apparent will vary depending on the size and weight of the tires and wheels, the size and weight of the vehicle, the sensitivity of the steering and suspension and the amount of imbalance, but usually starts at 40 to 50 mph and increases in intensity as the speed goes up.