86 Bronco II Automatic Jerks When Put In Drive

[mknulph]

Hi -

My 16yo son just bought a 1986 Bronco II 2.9 Automatic 4WD with 67k miles on it. When he puts the Bronco into D, N, R, P it jerks or lurches hard. Anyone have this issue and what did you do to fix it?

The previous owner just change the fuel filter, ignition coil, and ignition module.

Thanks for the help!
Melissa

[Phillippi]

It lurches with the foot on the brake? Like the brakes are bad or it lurches with so much power that it moves even with the brakes applied.? Is the idle way too high (higher than about 750RPM)?

[mknulph]

It lurches with so much power that it moves the Bronco even with the foot on the brake.

Idle is normal

[mknulph]

It also doesn't matter if the engine is cold or not.

[Phillippi]

Here is a long shot, but is it in 4lo?