You are running out of fuel. As you are going up the hill, the fuel is sloshing around causing sudden fuel starvation to the engine.
gravity
torqeconverter lock up its normal.
Mine hesitated going up hills when I bought. Plugs and wires took care of the problem.
sound like a fuel inj. or timing
Get a new car................ -___-
That would be your transmission Also do not forget to check your spark plug cables. I had an issue going up hills and it turned out to be the cables.
What kind of car is is? When it jerk while shutting off, do you turn the key off and it sits there chugging for a second before stopping?
Something to do with the transmission. Probably slipping It's the force of momentum being exerted on the car, the chassis of the car doesn't quite "catch up" with the engine itself without a transfer of momentum, or "jerk".
Just had a rebuilt transmission still have no power going up hill
Most likely you have an ignition misfire. Check ign coils, ign wires, spark plugs etc.
One of the possible causes of a Pontiac Bonneville to jerk during acceleration is that the car needs a tune up. The engine misfiring can lead it to jerk as you accelerate.
I had this problem until I had the timing corrected. It is a very cheap and easy thing to do but best to get a proper service centre to do it. If the timing is slightly out the car will backfire and be sluggish when going up hills and acelerating.