Still stumped on suspension issue - Ford Powerstroke Diesel Forum
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post #1 of 5 Old 06-04-2013, 03:19 PM Thread Starter
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Still stumped on suspension issue

1999 F250 7.3 2WD

Had a up and down "shimmy" or front end bounce between 45 and 50.

Did this:

All ball joints replaced.

Tires balanced and rotated and problem still persisted

Had tires rebalanced and rotated again and still the problem.

Two different alignment shops say it's gotta be the tires. Tires are brand new when I bought the truck a couple months ago.

Shocks are pretty new but no name on them....could they be the culprit?

All wheel bearing are fine.
Brakes are new.

This is driving me nuts!!
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post #2 of 5 Old 03-05-2014, 07:45 AM
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Any ideas on this? Yesterday coming home from work I had my 99 250 2WD start a violent front wheel shimmy/wobble at 65 when I stepped on the brakes. it lasted for over 100yds let I got down to around 20mph.

Steering Box?

Last edited by ToyMan; 03-05-2014 at 10:24 AM.
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post #3 of 5 Old 03-05-2014, 09:55 AM
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Since I'm going to assume the alignment shop checked the trackbar. Find somebody with aanother truck and switch tires then go for a drive. It could very well be tires.

But often the trackbar is the culprit. Jack the truck up and support by the frame so the suspension hangs( take the wheels off so you font have to lift so high) and start wiggling stuff.

Wheel bearings, tie rods, track bar, check for play in your steering shaft or steering box. A Bad steering box can even cause a death wobble but its rare

Please check out my 7.3 Enthusiast Facebook group! All are welcome! LINKY

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post #4 of 5 Old 03-06-2014, 04:00 AM
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I had a frozen u joint make my truck jerk back and forth intermittently. But being 2wd that wouldn't be an issue. Besides a bad u joint my steering box had some slop in it. When I replaced my box and hydro boost pump it fixed the problem

02 F-250 7.3 Powerstroke PMF Suspension 20" XD Hoss 325/60R20 Dura-Tracs
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post #5 of 5 Old 03-06-2014, 11:38 AM
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a annoying hop on the same road could be a resonant frequency issue between the tuning of your suspension and the road.

death wobble / violent shaking sounds like a loose component resulting in a more dangerous type of resonance.

2000 F-250 supercab short bed, 7.3, 6-speed
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