The front end shakes violently when i reach 55 miles per hour

extension rod ? what are you talking about ? Is it a sway bar link or the axle shaft or ball joint ?

Hi Mikey. Take the vehicle for wheel balancing and alignment. Get the technician at the centre to inspect the steering and suspension linkages while he's doing the alignment, but I think wheel balancing will sort out your problem. Regards John

Have a front end suspension check done to eliminate any worm ball joints -shockies- worn suspension rubbers-- steering problems. If ok have a wheel alignment done and have the rear end aligned first as it affects the front alignment. The violent wobble is castor wobble and indicates negative castor possible from sagging suspension springs. The camber is out at that results in the car following every dip in the road. The camber has to work in conjunction with the toe-in measurement and if the 2 are not correct then you will have problems.

sounds like a broken belt in a tire or the wheels need rebalanced. i would recommend that you have your tires rotated and balanced by a trusted tire store.

tires? tires balanced? shake violently? if your jeep has a "Steering Stabilizer" I would replace it.

no its your wheels well out of balance get them looked at first fitting a damper wont stop this shimmy

sounds like the front rotors are warped, sometimes they can be machined as long as they are within the minium thickness. I hope this helps, good luck

have a look at your tires,to see if there is uneven wear, also for a little money, have your wheel alignment and tracking angle checked, these are the usual causes of shaking at undefined speeds....

P.S. does the shaking go away above 45 m.p.h.
if so, then its your wheel balancing

Check wheel balance,
check steering linkages for loosness - such as tie rod ends, steering rack linkages etc,
check driveline for worn/loose joints and bearings.

get your front end aligned.