Hard jumps in burnout

[Idani24]

hi guys, i'm new in this forums, i'm not from usa, i'm from south america, my english isn't well sorry for that,

i have rare problem, in my foxbody, all my life i wanted to do burnout, but its imposible to do that, because all my transmision make a hard jumps, y change all my rear suspension, upper and lower control arms, shocks, and poliuretane engine and transmisio mount, but thats imposible, tu solve this problems

you can check this video to see de hards jumps



again, sorry for my english.

 

[General karthief]

Can you have someone outside the car watch the rear tires while doing that and see if the tires are bouncing up and down?
Do you have stock quad shocks installed?

 

[Noobz347]

Shock is in orange
Quad shock is in yellow

If any of the shocks or bushings are bad, it can cause Wheel-Hop.

Bad upper/lower control arms or control arm bushings can also cause Wheel-Hop.

Torn or damaged torque boxes can also cause Wheel-Hop. The torque boxes are what the upper and lower control arms are attached to.

 

[Mustang5L5]

I believe it's wheel hop, but would need a video of the outside to tell.

Like Noobz said, could be bad bushings, bad shocks, damaged torque boxes, etc. Something is allowing one or both sides of the rear axle to move forward and back and windup, which causes the wheel to jump and slip backwards once the windup is released.