'94 Concorde Won't shift out of low

[CobraCDN]

Well when it rains it pours I guess lol.

Driving on the highway today had the cruise set, and all of a sudden it was if the tranny had shifted itself into nuetral. I caught it right away as the RPMs of course rose considerabley and hit the brake to dissengage the cruise. as we slowed to about 60Kms/Hr (about 40 miles/Hr) the tranny went into low, by itself. It will not shift up from low now. Reverse works well, low works well also. Fluid is clean.. real clean, No noises, no slipage, no smells, car has 176,000Kms on it, prior to this instance the upshifting was normal. This car has never been driven hard and has been well taken care of. Seems to me maybe a module. Perhaps the Tranny control module or also called eatx I think?

Reason I think this is I heard of an Intrepid same symptoms, and the dealership replaced the module in 10 mins and he drove it away. all was fine.

I sorta fear taking it into a dealer, as they seem to be known for replacing a little to much in a lot of cases. Any suggestions would be appreciated. Oh and I still can not find that dang switch for the hood light lol.

Sorry for the cross post in the Intrepid forum but I'm desperate lol

Cheers

After reading other posts here, I thought I would add that the spedometer is working fine & the check engine light has not come on.