1995 jeep wrangler, 2.5L, 5 speed. The problem

Your shifter may have come loose and slipped out of position. This video may help.

https://www.youtube.com/watch?v=hMGU_3CCUBg

Remove the distributor cap and rotor, lift the sensor out and drop in the new one.

It sounds like the clutch is slipping, requiring a new clutch.

thermostat is sticking causing that ...

Could be one of several items...I'd check the fuel pump relay, auto shutdown relay and the ignition switch itself. I'd bet on it being one of those relays but, we all have been fooled at least once!!! I'd also make sure that body and engine grounding is good and clean. Relays can't work properly without a good ground.

if this is something that started suddenly, it could be a leak in your master cylinder or slave cylinder, or your fluid could be low, or there could be air in the lines. Make sure it's full of fluid, and get back to me.

You have a leak in the AC system, have it tested and repaired.

a right angle pipe coming out from the top of the valve cover with a rubber hose attached. if you it out, shank it! it should sound like a mabble inside of it.

have you checked fuel pressure regulator.hopefully this helps

If you are running 33"tires or larger you need to change gear ratios.
Hope it helps.