1973 Bronco Bump steer

[hunter1]

I went through this with my son’s TJ a few years ago. New control arms, new drag link, new stabilizer links and nothing changed. Got to playing with the air pressure in the tires (lowered into the 20’s psi range and no more throttle steer. I’m sure I checked the air pressure to begin with?

 

[DirtDonk]

And I didn't see it if you came back with the info, but do you know whether or not the rear differential is an open, limited-slip, or full locker?

Paul

 

[Broncobowsher]

Bump steer vs. torque steer
Bump steer will cycle the steering wheel side to side (or steer the vehicle side to side) as you go through dips in the road and the suspension cycles.
Torque steer is dependent on power being applied.

The overlap is applying power will unload the front suspension and squat the rear, and the opposite when you get off the power. Bumpsteer can be torque induced, but not limited to torque induced. But torque steer requires torque input and is not dependent on bumps in the road.

The key to seperating the two is getting the suspension to cycle without input from the powertrain. If it only happens with powertrain input, it is torque steer. If it happens without powertrain input, bump steer. And no rule saying you can't be fighting both.