[jdkskyking]

Hello Jerry.

I have coach #744, a 2005 model. A couple of years ago I found that every boot on my steer axle tie rods was deteriorated along with the sway bar link boots, tag center link tie rod boots.  
ZF tie rod "ball joints" are not serviceable. Once the boot deteriorates the tie rod ball joint is exposed to the elements and road debris.

Each component has a fixed tie rod and one adjustable threaded tie rod. On the steer I inspected each "ball joint" carefully, found play that in my opinion was out of tolerance and opted to replace all of the components.
Two steer axle tie rod "drag link" left and right.
Two steer axle sway bar links.
One tag axle drag link/center link

I have posted ZF information to help owners identify the parts however, it is very important that you locate the data plates for your suspension so the proper parts can be ordered.

ZF Suspension Info

My data plates were taped over. I spent several hours compiling information to ensure I was on the right track. I know more about the ZF Suspension and Rear Axle Steering than I care to admit.

   

I worked with:
Creslie Clark and Cambri Mosley at Newell Service Center
ZF Customer Service in the USA 800-321-0784
A ZF supplier in Florida, Jessica at Precision Transmission 239-693-7477.

Because of the age of my coach, I decided to essentially zero time the control arms, sway links, and tag center link. I've also replace all of the control arm bushings.

I would be happy to discuss in greater detail if you feel it would be helpful. 

Good luck, JK