Thanks to you both for your replies. I'll let you know what I find when I get it torn down.

Mr Fixit, I believe you had a post where you documented that you've got some 7FGU15s in the mid 20K hr.s range ? I have 4 of these which range from 10K to 15K. I may be seeking your advice in the future.

On a related note: I've had 2 of these lifts recently that have had problems where the trans. wouldn't go into one gear or the other. I swapped control valves with some junker units from another location in our company and that solved the problem, I'd like to refurbish the problem control valves to have on hand as a spare. I've heard of problems with the wiring harness that passess through the top of the valve. Both my harnesses appear to be okay based on tests with a multi-meter. I guess the next most likely place to look is the solenoids. Is there a way you can test these to see if they're working properly?