what causes bump steering? - JeepForum.com

 
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post #1 of 6 Old 05-07-2006, 11:26 PM Thread Starter
losfreddy
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what causes bump steering?

Can i please get a brief description of what bump steering is and what it feels like, what causes it?


99 TJ. 5 sp Manual. 4 cylinder. 2.5 liters. airaid intake.
Rock Guards. 32x11.50r15. 4 inch lift. nitro Shocks.
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post #2 of 6 Old 05-07-2006, 11:37 PM
Jerry Bransford
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Bump steer is when the steering wheel is forced left and right as the front suspension cycles up and down over bumps and dips in the road. It's caused by poor geometry in the steering system, like when the track bar and drag link are no longer parallel... most often cause by installing a dropped Pitman arm when it wasn't needed.

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post #3 of 6 Old 05-07-2006, 11:50 PM Thread Starter
losfreddy
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Jerry, how can i tell if my current pitman droparm is an aftermarket one?

99 TJ. 5 sp Manual. 4 cylinder. 2.5 liters. airaid intake.
Rock Guards. 32x11.50r15. 4 inch lift. nitro Shocks.
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post #4 of 6 Old 05-07-2006, 11:59 PM
Jerry Bransford
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Quote:
Originally Posted by losfreddy
Jerry, how can i tell if my current pitman droparm is an aftermarket one?
Does your TJ have bumpsteer? If it does, likely you have a dropped Pitman arm. If not, likely you don't have a dropped Pitman arm.

Measurement wise, I think my old non-dropped Pitman arm had maybe an inch of height difference to it. Dropped Pitman arms probably have more like 3". Both of these dimensions are simple WAGS (wild-a$$ed guesses).

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post #5 of 6 Old 05-08-2006, 12:05 AM Thread Starter
losfreddy
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yup, that droparm looks like about 3 inches not 1. But why would my steering start bumping now? Think its related to getting mud in the hub cap?

99 TJ. 5 sp Manual. 4 cylinder. 2.5 liters. airaid intake.
Rock Guards. 32x11.50r15. 4 inch lift. nitro Shocks.
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post #6 of 6 Old 05-08-2006, 12:07 AM Thread Starter
losfreddy
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could a night of turning the wheel in the wet mudd have put enough strain on my trackbars and cause my passenger wheel to begin wobbling?

99 TJ. 5 sp Manual. 4 cylinder. 2.5 liters. airaid intake.
Rock Guards. 32x11.50r15. 4 inch lift. nitro Shocks.
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