Leaving work today I noticed that the shifts on my auto box is hard/harsh, like popping the clutch during a race. I didn't pay to much attention to it. halfway to home, suddenly it shifted back to third for no reason and the MIL comes on. I now have got third gear, i think, and reverse. Hooking 1st on the shifter does not help.

where can I start looking for the problem?

I bought a obd2 reader that plugs into my laptop and have various software to use and all of them indicate the same thing. no extra information.

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2005 Jeep Cherokee Renegade
2.8 CRD Auto
MOPAR factory bits ......for now.
60mm Home lift. spacers front and coil springs rear.
Future: (1) LSD front. (2) Locker rear. (3) If possible Rubicon transfercase.

When the engine fails a 4.0l V8 smallblock.

So last night I checked the oil level. Yellowish colour and not red. Looks too full. Im bying the filter today and draining it on saturday.

I fiddled with the input sensor plug, pressure switch plug and output sensor plug.

Put the laptop back on and reset the failt code. I took it for a spin and everything is normal again.

I'll definately replace the oil and from there see what happens.

_________________
2005 Jeep Cherokee Renegade
2.8 CRD Auto
MOPAR factory bits ......for now.
60mm Home lift. spacers front and coil springs rear.
Future: (1) LSD front. (2) Locker rear. (3) If possible Rubicon transfercase.

When the engine fails a 4.0l V8 smallblock.