My 94 Chevy sub starts right up but when put to drive it jumps then it shots off

Question edited for clarity.
Question moved the Colorado sub-category.

I wonder is you picked something up and the serpentine belt whipped the stick or whatever and disconnected the crankshaft position sensor. Can you reconnect it and start the vehicle?

When you set the timing if this year has a distributor you have to disconnect a wire to properly time it. Check witha. Chevy dealer. For wire to disconnect. On my 94 k1500 it's on the back of, the alternator.

Will it physically fit? yes. Will it be a direct replacement any everything hook right up and plug right in? If we are talking about an automatic then no. 1994's wiring was completely different than the 1997. Can it be made to work? possible, but I believe it would be more trouble trying to make it work than if the correct transmission were located and installed. If it is a cost issue where he has a good trans out of a 1994 he might see if a salvage yard will do some partial trading for the correct trans.

could be a problem inside the alternator
you might want to have it bench tested at a store

If fluid level in trans is ok it sounds like clutches in tranny or internal pressures are going bad.

need vavls seals

I would recommend replacing the in-line fuel filter

YOU COULD HAVE PROBLEMS IN GOVERNOR.THE GOVERNOR VALVE STICKING.GOVERNOR DRIVE GEAR WORN DAMAGED OR RETAINING PIN MISSING.GOVERNOR WEIGHTS OR SPRINGS BINDING MISSING OR DAMAGED.YOUR 1 - 2 SHIFT VALVE IS STICKING.

94 chevy cav. after driving for a while, the car shuts off when u break. it will start back up but stalls as soon as you put it in a gear. let it sit for half hour and it will drive again for a while then starts the process all over again. any suggestions

What are you asking hear, if you know wear its leaking then you have to bite the bullet and fix it, there is no easy way, the only other way is you have to take the cross member out and drop the tranny down to get a clear shot at it its up to you.