Transmission My 1996 jeep Cherokee 4xdrive is shifting good but some times it will like start to jump or act like it needs to go to passing gear if I hit the gas it stop, note in town driving and shifting is good but when I go up a hill or start to clime , do not do it all the time is it my trans or my catalytic converter/

4.0L
what transmission, mines a 5 speed stick so?????
idles good, well that dont take much.
will only move, car moves?
with what wide open ,the throttle?
well just barely throttle is normal, why say that?

my guess is car has low power, or can not go fast in all gears.
is that it?
if yes, that is transmission slip or a weak engine,
transmission slip is easy RPM goes way high car dont move
weak engine acts like brakes stuck on , low RPM deep right foot.
post all symptoms and win, big time.

Corrosion on the Battery if the Battery is good...

try checking your transmission fluid level , low fluid will cause shifting problems

Passing gear?

Were are not in the 1970's anymore

Your transmission is computer controlled &
certainly does have issues.

I suspect you will be pulling it soon & having it rebuilt

If the transmission will not go into gear or has trouble finding gears and has the proper amount of fluid, the shifting linkage could be bent or misaligned, especially on automatic models. The linkage can be found on the driver side of the transmission, toward the top of the unit. Inspect it to make sure the components aren't bent or broken and have someone shift the Grand Cherokee while you watch from underneath. Most times, only minor adjustments are necessary.
Also, check Torque Converter and scanned the TCM (Trans Control Module) to know if some fault code is stored there.

It should be an electronic problem Scan the transmission and post the codes

Because the transmission is going out. It skips second gear because second gear is gone.

Check the oil levels in the transmission, if it is low, this will stop the gears engaging, hence not driving at all, this is a safety mechanism on the transmission, DO NOT OVER FILL IT WITH OIL, this will destroy the transmission

sounds like a faulty transmission bud.

Could be low fluid, burnt fluid, or worn one-way clutch or brakebands.

Best to let an autobox specialist try it out and give you a full opinion.

make sure all of the cables on the spark plugs are connected correctly, if so, replace all the spark pluks, if not that replace the wiring distrubution harness