Power Steering ?

[RWehling]

My 2006 3500 steering wheel sticks intermittently. I was driving at 65mph and the steering wheel appeared to stick. The wheel would pop loose when I applied pressure. I pulled over and did a quick mechanical check and didn't find anything. When I looked at the P. S pump I noticed the cap was gone. I made a quick cap out of some tape and a bottle cap and made it home with no further problems. I bought a new cap and a week later it happened again. The cap was still in place and when I removed the cap it appeared to be under pressure. I'm not sure if I have air in the lines, a pump going bad or something else going out. Any suggestions would be appreciated.

 

[rbattelle]

The disappearing PS cap has been around for awhile. It could be an overfull condition, or it could be a bad internal valve allowing pressure to the reservoir.

Here's a thread about the cap blowing off:
Thread.

But the fact that you actually lost power steering suggests to me a problem with either the steering gear or the pump itself, as opposed to a simple "cap blowing off" issue.

In other words, the cap blowing off may be a symptom of other issues in your case.

Ryan