I have a 2000 grand cherokee and my suspension is terrible it feel like im hitting something hard when i go over a little bump.I've changed all 4 shocks and it seem like it really not that much of a difference.also my steering wheel smrtime squeaks when I'm making a turn i've gotten another steering wheel but it seems to keep squeaking just not as much HELP
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Re: suspension and steerin wheel
It is difficult to just assess wut is causing the suspension knock. U will have to go under the vehicle or let someone who is experience about this do it. Go under the vehicle and check the entire suspension system, steering ends, rack ends, ball joionts, rubber bushings etc. Well u said u have changed ur shocks but no difference. As for the squeaks, this might be coiming from the universal joint from the steering column. Like I said they really have to be inspected.
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you may have had something fall down into the defrost vent and it has worked its way down and is blocking the air flow thats trying to come out the vents,near the blower motor.also does it sound like the blower motor is spinning on high speed or at a lower speed,you could have a slow turning blower motor.
Vibration from about 40-60 mph is usually attributed to wheel balancing, but the onset when you hit a bump seems to indicate play in the steering linkages (tie rods etc) or suspension members and stabiliser bar rubbers but you had that all checked out, that brings us back to the wheel balancing.
There are lots of possible causes, and they can all be fixed.
One is alignment. If there is a bent tierod or something from hitting a curb, the front tires will be scrapping sideways slightly, and very noisy. Very high traction tires are also very noisy inherently. Wheel bearing will also do this, but unlikely at this new age. Rotating radial tires from one side to another will cause excess tire noise because cords will be slack in the tire. But there is not much that can be done if that is the case except new tires. Tire pressure either to high or low can be very noisy. Wheel balance can do it also.
It's probably the rear sway bar links. If you can jack your car up and check right behind both rear wheels you will be abale to see the sway bar which is connected to short links about 5in long with ball joints.
If either of them are broken or not connected anymore it can cause some pretty loud noises when you ride on rough roads or hit bumps. They run about $35 per link so it's not a very expensive repair.