How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask sprinkles08 Your Own Question
sprinkles08, Chrysler/Dodge/Jeep master tech
Category: Dodge
Satisfied Customers: 22693
Experience:  ASE Master and Advanced Certified, Chrysler/Dodge/Jeep Master Certified, Trans and Hybrid Specialist
Type Your Dodge Question Here...
sprinkles08 is online now
A new question is answered every 9 seconds

My hubby has a 2002 3500 dodge diesel cummins. He has a

Customer Question

My hubby has a 2002 3500 dodge diesel cummins. He has a 'hopping' in the ass end. We just replaced a transmission mount that definitely helped. He went completely over the rear drive shaft and all ujoints are good. When I'm driving it at a coast, it hops forward and in reverse. When I brake hard it really hops. What the heck is it????
Submitted: 1 year ago.
Category: Dodge
Expert:  sprinkles08 replied 1 year ago.
Hello and welcome to JustAnswer!
It sounds like you have a couple things going on. If you're getting a shake that happens when pressing the brake pedal then most likely you have warped brake rotors.
It's hard to say exactly what you're feeling without seeing the vehicle in person. If it appears to be coming from the rear then it has to be a suspension, tire or axle issue if the driveshaft has been ruled out.
Does the problem happen over bumps or will it happen on smooth pavement?
Does it only happen on deceleration?
Does it have a throttle sensitive vibration?
Does vehicle speed or putting the trans in neutral have an effect on it?