Front end has a shimmy and vibration at 55 mph
SOURCE: 1996 dodge grand caravan vibration 45 mph to 55
Vibrations while driving like you are describing can come from tires that have defects (internally broken belts) (wheel weights that have fallen off) or a bent rim (perhaps from another driver [not you :-) ] hitting a curb) Are the tires worn? Have they been balanced and rotated regularly? You report no vibration in the steering wheel.
Vibrations during braking can be warped rotors or discs (but this doesn't sound like your problem since these kind are usually felt in the steering wheel during braking).
If and only if you feel like you can do this safely,
you can try getting the car up to 55, placing the car in neutral, then switching the "engine off" but leave the "key on" (be warned the power steering will go out but the vehicle can still be steered though the steering wheel will be much stiffer) if you try this (do it perhaps in a vacant parking lot or on an empty road) and the vibration goes away with the engine off but while the vehicle is still moving, then the vibration is engine or transmission related. If this is the case you might hope for maybe a bad engine mount. Bad engine mounts can be diagnosed with the vehicle stopped as well. However, if the vibration remains with the van moving forward but with the engine off, the vibration is likely a problem with the tires or suspension. Try to provide some more info.
If you don't feel comfortable trying the above suggestion, please take the vehicle in to an ASE certified suspension and steering professional for further diagnosis.
Finally, I had a similar situation happen to me today. I was riding with a friend in their van and the vehicle started vibrating more and more around 55 mph. We stopped and carefully checked the front tires (including the lug nuts for tightness) but
found a tire defect. (it had several broken steel belts that caused a bulge in the tire and thus the vibration) We changed the tire and the vibration was gone. Good luck to you.
SOURCE: At 60 mph, front-end shimmy/shake
There are a lot of things that can cause it to shimmey, and there is not enought room here to explane it all. My advise to you is to take it to a frontend alinement shop and have it chk. out, could be serious.
SOURCE: Front PCV Valve on chrysler town and country
PCV valve location-2.4L engine
PCV valve location-3.3L and 3.8L engines
SOURCE: Substantial front end shimmy at 50-55 MPH.
How did the old tires wear. Looking at them will be the indicator of an issue. If they wear on the inside you have a lower ball joint issue. If wearing on the outside the upper ball joints are bad, Also you may of got a defective tire or the balance weight fell off. Also tha axle bearing nut may be loose. Also the linkage going across could have bad ball joints. Best to go get it inspected. Its worth it rather than trying to figure it out yourself
SOURCE: chrysler town and country wiring diagram
Where is the amplifier located on a 2002 Town & Country? My stereo seems to be working, but there is no sound coming out of the speakers.
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