Rear end vibrates in 2005 dodge grand caravan

SOURCE: 2003 Dodge Durango vibrates at 60 mph

Check the transfer case and u-joints for wear.

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.

Dar

• 2007 Answers
• Posted on May 21, 2009

SOURCE: vibration at 75 mph

Must be bad u-joint. To check it, let off the gas pedal. If it stops right away, it's the u-joint. If it takes a few seconds, it's a tire out of balance, or a bent wheel.

SOURCE: Front end vibration at between 70-80kms

A common solution is the tires. I know that sounds too easy but I had the exact same problem. My Dad told me tires. That was hard to swallow since all 4 tires were less than a year old. It was the style of tire on the car. He is a mechanic and I did what he said and it went away. O it could be a bent rim or a bad front wheel bearing. I've seen both

SOURCE: Vibration on driver side I put new tires on an

Jack up truck under lower control arm, so tire is off the ground. Grab the tire at 3 oclock & 9 oclock position. Check for play or movement. If any most likely wheel bearing. Also check for play at 12 oclock & 6 oclock. If play there upper or lower balljoints need replacement.