Join Date: Oct 2007
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my death wobble story
like my sig says, 07 f350 cc LB with 6" fabtech lift and 37" tires. I've had the lift for about a year and 11,000 miles. Since it was installed I noticed a little drift while cruising down the freeway. The past 4 months I started noticing a minor shimmy or shudder in the front end while going over uneven road surfaces.
about a month ago I experienced a noticeable wobble in the front that got my attention. About 2 weeks ago I almost drove off the road while towing due to a violent wobble in the front. It shook so hard that I couldn't control the truck. I was going about 40 at the time and all I could do was slam on the brakes to slow down as fast as possible. This event scared me b/c I had my kids in the truck.
I came to this site to do some research and found the problem usually centers around the track bar. I took it to the shop that installed the lift and they found about 3/8 - 1/2" of play where the track bar bolts to the drop bracket. I guess this is the bolt that takes 400 lb/ft of torque?
The shop checked the bolt and found that it was torqued properly. They then made some calls to Fabtech and to the shop's distribution center. Fabtech told them to have me go back to Ford and reference the steering oscillation TSB. I didn't want to do this because I knew the play in the track bar was the culprit, not the steering gear box.
They were also told by their distribution facility that the Fabtech drop bracket for the track bar is a nice machined and powder coated piece. The OEM piece is rough. They suggested removing the crush sleeve that the bolt goes through and scoring some grooves into it so that it'll bite. The shop went one step further and scraped off some powder coat and roughed up the steel on the drop bracket.
While I had it in, I had them install a dual steering stabilizer too. This plus the work to the track bar bracket have completely eliminated any wander, shimmy or wobble in the front end.
For those of you with lifts that utilize a new drop bracket for the track bar, especially those with Fabtech. If you experience the "death wobble", I'd suggest looking at the bolt where the track bar mounts to the new drop bracket. Make sure the surfaces are rough and the bolt is properly torqued.
08 F350 6.4
H&S Mini Maxx Street