Some problems with auto boxes is the oil needs changing and the filter.

Good clean new oil and a filter works wonders in a auto and this "may" be your problem ,If it's never been done or your unsure have it done for the small price it will cost.

It can also be a sticking valve which is stuck by the oil crud.

See how you get on.

We did as suggested and had the gearbox oil changed, this made no difference, we then arranged for the imput and output speed sensors to be changed but the mechanic checked the battery charge first and told us this is probabaly the problem, it was only charging a 9 volts, he is changing the battery today, has anyone else had this problem?.. Our Jeep usually gets a good long run once a fortnight but for various reasons we have missed out lately but it looks like it backfired!

Re the battery changeover, we had the battery changed by the gearbox specialist ( who comes highly recommended as a genuine guy) and had fixed a similar problem in our nephews much newer jeep last year,he looked at the Jeep and said a code was showing for a Camshaft sensor fault and he knew of other issues with the low battery charge. Searching the websites I found a few comments regarding this fault which a number mentioned created other problems . Having arranged with another garage to have the sensor replaced I found when driving home that the engine management light went off and the gears changed up and down perfectly. It was out in the snow last night and again worked perfectly. needless to say we are not bothering to have the camshaft sensor changed . So having had the gearbox oil changed and a new battery the jeep is running perfectly.