[De La Grand]

Hi! Please help me. Maverick, 3600km. There are sharp jolts, jerks, vibration at a set rate in the range of 20-60km \ h
When engine braking similarly. It is almost as if you go with a heavy trailer and he pulls pulls back.
What could it be? When you turn AWD bumps, jumps, twitching vibration are not as noticeable. This gearbox? Cardan? CV joint? Rear differential?

 

[PLAY-DOH]

Flat spot on belt from sitting still in gear. That's where I would start

 

[De La Grand]

Flat spot on belt from sitting still in gear. That's where I would start

Belt new variator no wear, the engine was tested on the stand all good. My suspicions transmission or rear differential. But with such a failure should be noise and flow of oil through the seals.

 

[Trev]

Did you check what condition your helix is in
This is from my outlander. The shop didn't line up my tail shaft and after a while it sounded like nunchucks in my engine. It turned out to be the gearbox bearings had failed coursing to much heat so they melted.