Steering wheel oscilates left & right

Yes, I should admit I have a siezed u-joint on the RH passanger side. Do you think this would be causing my symptoms, even if the hubs are unlocked?

Thanks guys. The reason I didn't mention the siezed u-joint at first is that I did not want to lead the discussion that way, I wanted all of your fresh thoughts on the subject. I spoke to a really good independent shop that specializes in PSD, & they raised the u-joint issue as well. These guys come highly recommended. The u-joint issue would have to be fixed regardless. Due to recent health issues, I'm going to let those guys do the repairs. They have the proper tooling for installing those shaft seals.

What amazes me is that left turns initiate this problem, but not all the time.

FJK

Fordsforever73

Good explaination, but my tired old brain might not be able to think the whole thing through. Would that mean the u-joint, although not driven in 2wd, would still have to rotate through some means, to get the siezed plane in some position to create the problem? If so, what or how does the u-joint rotate. I think you have more brain power on this subject than I do.
Thanks, FJK

No, I'm not driving in 4WD. Manual hubs are unlocked, I'm in 2wd when this is occurring.

Excellent explaination. I'm sure this helps everyone that reads this post understand what is happening. For me "So as you drive the front axle shaft still spins, although freely as there is still some friction to cause it to spin." explains why it happens sometimes and not at other times.

Thanks, FJK

Replacing the u-joints on both axles solved the problem. The ball joints were replaced as well, but I believe the steering oscillation was a u-joint isssue.

Thanks all, FJK