Expert: jack bahm - 7/25/2008

Question
I just drove my car today for the first time after rebuilding the motor. It is a 1958 AMC Series 10 Rambler Sedan with a 196 OHV with a T 86 Overdrive. As I drove the first 20 miles, the motor died. I got out and could find nothing wrong. It started up again and I drove about 10 miles, accelerating up to 50mph. Suddenly, the rear wheel chirped and it came out of OD. The OD no longer works and it does not freewheel. I suspect the kickdown switch because I have continuity between like posts, but I don't know if this is normal. Can you think of a reason for the OD to disconnect at speed?
Thank you!

Answer
I am a Model A guy, but I can give you my thoughts on this.  The engine problem is probably not connected with the OD situation.  Sounds like a fuel problem with the engine.  Plugged line or filter, or junk in the fuel.  Maybe vapor lock also.
If you did ot have the OD apart, then it should work.  Probably a switch and not the gears.  If you had it apart, it could be anything inside the unit.  It's a torque reversal at speed that engages the OD.  It may not recognize that you are going fast enough.  Some sensor in there.  Chase the electrical problem down and you may find it.  
Try to find a manual for the car, or an AMC car club and join it.  They will have all the answers and be happy to help you.  Look on the net for some AMC people to answer your questions.  
The old OD is pretty basic and any old timer in a trans shop should be able to help you.  
I think it dows take current to energize it, so you are probably correct looking for an electrical problem.  Maybe just an old wire gave out.  Take the time to do a good visual inspection looking for an open connection.  Maybe a fuse has gone.
Sorry I can't be of more help.
Good luck.
jack