A follow up to my Happijac old style motor dying on my 4800 jack. I ordered a new style motor, and installed it on the 4800 jack. Works fine, very quiet. Not sure if the new clutchless style motor is turned off by the new style controller, or in the motor itself. If it shuts off in the motor, I should be OK. If it's shutoff by the controller, I'm still using my old style controller, so I'll have to be careful when I retract the jack all the way in so the fuse in the controller doesn't blow.