Slipping 1st gear AW4
When cold with the lever on D, my 2000 Cherokee drives for few seconds in the 1st gear then disengages, with a little acceleration it re-engages and shifts up normally.
It works fine in all speed ranges and normal acceleration.
The problem is at low speeds when trying to accelerate it slips few seconds just when I press on the pad, then re-engages in a high RPM but with a bang you don't like to feel, it may break a gear in the tranny after so many times.
On a steep hill or incline, it slips badly, looks like the oil doesn't reach some parts of the gearbox or the valve body even the level is OK.
I guess it is the #1 solenoid not working well, need your help in this issue, any comments will be greatly appreciated, .thanks.
2015 GC Laredo 3.6L