Question about 1999 Dodge Ram

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I have a 1999 Dodge Ram 1500 4x4 V8 360 in it. When I drive down the highway once the speed hits between 40-45 mph something under the truck starts vibrating really bad. I can feel it through the floor board and when i look down the 4 wheel drive shifter is vibrating really bad and i can see it moving. I checked all the U-joints and they were all good except the one on the drivers side front axel. I changed it but it still does it. Any ideas would be helpful.

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  • Contributor
  • 20 Answers

Sounds like tires need to be balanced.

Posted on Jun 14, 2017

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 114 Answers

SOURCE: Front end vibrations at highway speeds

sounds like you may have unbalanced tires. take your vehicle to a tire shop and have them balanced

Posted on Dec 24, 2008

farroutideas
  • 78 Answers

SOURCE: 97 dodge ram 1500 shakes at 45 - 55 mph after overdrive

Hi there;
It is possible your O/drive plates inside your transmission are getting worn/burnt. The speed you are discribing is the same speed that the torque convertor "locks up" that puts extra load on the gear that is applied & if it is weak it will slip/viabrate.
I'm not sure it will work but you could go to your local parts store & pick up a can of trasmission seal conditioner & follow the instructions on the can. some times this helps, also make sure you fluid is quite fresh, you might want to have youtransmission fluid "flushed" as this will replace nearly all the fluid in the transmission, this quite often helps any transmission isues with dodges, they are quite particular about the fluid being in good shape. I was a transmission tech for dodge for 4 years & saw a lot of these issues. unfortunatly if it has gone for a while you may need to overhaul your trans.
I also noticed the picture didn't go through for the EGR valve so I am resending it on this comment.

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Good luck I hope this helps.
Please keep me posted.
Farrout!

Posted on Mar 19, 2009

Monster80
  • 460 Answers

SOURCE: Vibration at speeds of 45-55mph

Check your drive shaft u-joints..Number one cause.Have a great night!!!

Posted on Apr 03, 2009

  • 12 Answers

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.

Posted on May 08, 2009

  • 7 Answers

SOURCE: i have a 1997 dodge

I REPLACED THE ENTIRE FRONT END OF MINE AND WE USED A HYDRAULIC JACK AND THE WEIGHT OF THE TRUCK TO PRESS THEM OUT AND A BALL PING HAMMER TO PUT THEM BACK.

Posted on May 26, 2009

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