I agree its a design problem. independent front suspension vehicles don't get this.

I had one customer come in with a brand new 3500 (with 20 000kilometers) saying its happening when he pull heavy loads. We can't duplicate it as he brings it with no trailer. We took his lift kit out; he says it still happens. Everything is new...no worn parts. Changed out the good new parts...no change. riddle me that!

 

Have him bring it in in the condition that the problem presents itself...... Otherwise, you are just shooting in the dark.

 

Death wobble can affect any straight axle vehicle using a track bar. What I don't understand is why not switch to a triangular 4 link. It gives a better ride and better flex. IFS doesn't get this because the suspension is bolted to the frame (can't move). When summer comes and I get free time I'm going to do a 4 link on my 01 (already did on my 96)

 

An SFA is not a design problem. If anything the problem with DW is either worn parts, insufficient positive caster, or a weak steering stabilizer.

Yes, yes, technically a stabilizer is a band-aid but a great many OEM's use it (and actually quite successfully) to combat DW.

There are cams on the LCAs, dial the caster another degree. If you've maxed out adjustment, it's time to start looking to aftermarket solutions or fabbing things, ie drop brackets for the LCAs or longer arms.

My coil sprung SuperDuty also had DW, only with a trailer behind it. It makes perfect sense because it removes weight from the front wheels, allowing them to "flutter" around more easily. In my case a new Bilstein stabilizer eliminated it completely, but BD Diesel offers a kit to permanently add caster to those front ends. While the Mopar front end is slightly different, the basic principles of alignment with an SFA remain the same.

Those wishing for IFS.........be careful what you wish for. Much like a manual transmission, an SFA has distinct advantages, but fewer and fewer people are able to appreciate them as time goes on.

 

I love SFA hate IFS. The SFA isn't the problem it's the suspension system. Why rely on a single bar to hold the axle side to side when you could have 2 solid bars to do it.

 

sfa is great for loading...no toe change with ride height change so no irregular tire wear. my 2500 gmc ifs ride so much smoother over bumps....my 2500 ram is a lumber wagon.

 

Track bar on my lifted GC. About every Month had to tighten it up on the axle. The mounting bracket hole wallows out. Get a couple body washers and weld on, even if it isn't broke.