I posted a couple of weeks ago asking for information about motor kits for a drop leg (GN) jack. 

I had nothing to do with this (I swear it!), but my current jack gears are apparently stripped (I knew that sucker was too hard to crank!).  The guys in my shop are going to have a look at it as soon as they get a chance, but until then - If the jack is ruined, are there options to repair it?  Will the whole thing have to be replaced?  What size capacity jack is required for this application? Can I get some feedback on a complete unit with and without motor?  How about hydraulic?

I have been reading this board almost daily since I found it, and have learned quite a bit.  I'd love to hear any opinions about jacks.

Here's a previous posting about a similar problem. Many of the ideas are apropos to your situation. http://www.horsetrailerworld.com/forum/thread-view.asp?threadid=9297

Gard