Wtf

Hi Guys,
I was driving today(about a half hour drive) in my EL Fairmont when suddenly the Cruise switched off, I looked down at the Speedo to see that it had Zero'd out. I noticed the engine was reving a bit hard, as a check i pull the shifter back into thrid, sure enough no change in engine RPM. I had lost 4td gear, the car had jumped back to third and wouldn't shift up into 4th again. In about a minute it had all come back only to drop out again in another few minutes. After getting to my destination and letting the car sit, I drove home. Not a a problem all the way home. Does any one have any ideas?

I was thinking it could just be a speedo sender unit getting ready to die, but I can't explain why 4th disapeared. Can anyone shed some light on the situation?


Regards,

MontEL