99 Yukon front axle

[wjburken]

If you decide to drain the fluid, make sure the fill plug comes out first so you know you can get more fluid in.

 

[Patten]

This has been done. We have now ordered a new axle and clip.

 

[Patten]

This has been done. We have now ordered a new axle and clip.

Referring to B-train's post.....

 

[B-train]

Good news! Did you find the remnants of the original clip? How's the axle seal look in the housing? Easy to replace right now since it's apart, IMO

 

[Patten]

I honestly haven't had one of those apart in quite some time. So from what I read your right side axle will move out of the axle tube and not allow the 4wd actuator to engage it? If that is truly the case I'd pull it apart and have a look see. Can't say I've ever seen this, usually the little rings hold the axles pretty good.

That is what is going on.

 

[Eman85]

https://aamaftermarket.s3.amazonaws.com/resources/pdf/file-20150130094807.pdf

Might not be exact but on the passenger side in the box marked 4wd there is an outer shaft and an inner shaft, parts #2 & #28. Between the 2 is a slider that is moved by the actuator to engage the right side axle when 4 wd is selected. If the actuator is bad/weak it won't move the slider to engage fully.

 

[Patten]

We believe we found the problem.

Both bump stops were slap worn out and gone and therefore allowing to much travel up and down and pulling on the axle. We would not have realized this if the same situation did not start happening on the driver side.

Both bump stops replaced. Wait and see now.