Thump when in reverse under load?

[Ocelot]

I'm not sure if I can explain this correctly, but I'll try. I've notices a thump in the drive train in reverse that you can feel but only under certain circumstances.

It only does it under load and when you give it gas. Not just the act of putting it in reverse. For example, when I was backing the trailer up on a slight incline on dirt. It also did it when backing up the same incline without the trailer.

It reminds me of a locking differential locking when a wheel slips, but I'm pretty sure that I neither have a locking differential or that the wheels slipped either.

At all other times, everything is perfect and the drive train seems smooth and tight. Just wondering if anyone else has experienced anything like this and it's just something normal.

 

[bloombloom88]

i havent noticed this on mine, but i think it could be the "traction control" kicking in. if you have the slightest wheel spin, it will kick on, and from what i understand, if im wrong somebody please correct me, the computer will apply the breaks slightly to whatever wheel/s it thinks it should in order to keep your vehicle in control. its very annoying and useless IMO. when mine kicks on the whole truck shakes back and forth like your rapidly taping the break.

 

[Ocelot]

Hmm, You might be right about the traction control. That sounds like it makes sense.

 

[bloombloom88]

there should be a button on your dash where your hazard light switch is, i believe it says esp. that will deactivate the so called "traction control" until you restart the truck. try backing up the trailer with it turned off and see if the problem is eliminated. let me know how it turns out