2022 Peterbilt steering shudder, Pete techs say this is normal

185k $

 

Tell him I said hi - he’s the only guy I’ll take a truck to.

 

What front axle did you spec ?

 

That is classic bump steer. Bumps in the road are being transmitted right up through the steering. The shake is obvious, only started immediately after hitting bumps and diminishes shortly after. Caster too low, or caster too high can cause this. Most trucks like the 4 - 5 degree range of caster. Some axle beams, such as Hendrickson, are a naturally "bouncy" axle. Prostars and earlier 9000's would have this all the time with those axles. The fix was a stiffer nylon kingpin bushing or thrust washer on one side to make the steering stiffer. Some tires are also just very bouncy if over inflated. Check your tire pressure to make sure they aren't too high and even try dropping 5 or 10 psi and testing it to see if that helps. One band-aid you can also have installed is a steering stabilizer shock, the type that mount between tie rod bar and axle horizontally to help cushion and absorb these inputs.

 

On the other hand, his own post said build quality of new trucks has gone to #### so…

 

Maybe early shock failure on the steer axle. I just recently put Monroe Magnums all the way around my truck, bumps on roads I travel regularly don’t feel like bumps anymore. Steer axle ride is greatly improved. I had a little bit of the bump steer you have, not as bad but it’s completely gone now.

 

Wow thanks alot thats alot of good information . Can bump steer develope slowly with life of the truck . I didnt had this problem when i got the truck brand new but it developed slowly around 12 to 14k miles .

 

Looks like just bump steer. The roads up here in the north east are terrible so all the trucks eventually develop worsening bump steer so we all just get used to it and hold the steering wheel with both hands on bumpy roads. I mean you could fix it by replacing steering components but it’ll come back a few months later especially if you keep going on terrible roads.

 

I did the classis touch the shock test . They all are warm after ride . But i am going to replace them soon to magnums .

 

Dana spicer 13200 lb