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Old 02-02-2012, 12:27 AM   #1
TNT89Bronco
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Sharp left turn-steering wheel jerks back and forth. '89

This morning, when making a left hand U-turn, I noticed that when I had the steering wheel cranked all the way to the left, the steering wheel jerked back and forth, like I was driving over a bunch of little curbs or something. Like it was being forced to the right a little, and then snap back to the left real quick. It was kind of weird, because it had never done that before. This is a stock rig, and it seems to drive fine otherwise (steering is a little loose, but nothing major).

I had someone hop in and do the same thing, and they felt it. I watched the front wheels, and they didn't seem to jerk or make any noise.

What should I do to try and determine what is wrong? Any ideas?

Like I said...stock, no lift or oversized tires.
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Old 02-02-2012, 01:43 AM   #2
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That's your power steering. Check the fluid level first but there is a possibility that the proportioning valve is a bit iffy...there are other things that can cause it but I would start there...
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Old 02-02-2012, 02:05 AM   #3
TNT89Bronco
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Ok, I will check, but this was a very strong jerk, and not a small shake.
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Old 02-02-2012, 02:12 AM   #4
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4x4 engaged for any reason on accident?

but yeah, check fluid in pump and if that doesnt help i might look into the gearbox
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Old 02-02-2012, 02:13 AM   #5
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I've had the same issue, on other vehicles, and yep, the power steering can really jerk your wheel hard when you are close to maxing out the turn...It can just about jerk the steering wheel out of your hand.
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Old 02-02-2012, 12:29 PM   #6
Mike4xdriver
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Make sure to check your axle shaft Ujoints. If you have one that is seizing up it could cause this problem.
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Old 02-02-2012, 01:26 PM   #7
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You have a hub locked.

Do you have auto's or manuals?
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Old 02-03-2012, 11:14 AM   #8
TNT89Bronco
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I have manual hubs, and that was the first thing I checked. Not locked. Fluid level good.
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Old 02-03-2012, 11:20 AM   #9
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Not locked.
Not locked as in you spun the driveshaft and made sure both steering u joints spun confirming the hubs where unlocked?

Or not locked as in you looked at the hubs and the dial says free so they must be unlocked, because a hub could never fail locked?
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Old 02-03-2012, 11:35 AM   #10
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yep Gacknar may be right. I had the same thing going on with my 89. Hub said free but I couldnt rotate the steering ujoint. Replaced the hubs with warn hubs and no more problem. It was the manual lock that wasn't disengaging when you turned it to free. That would be worth checking into.
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