My 94 Concorde 3.5L has an odd tranny problem which doesn't seem to fit some of the other issues that were posted. The transmission simply refuses to shift at all unless I peg 4500+ RPM. Is this still limp mode? I thought that limp mode allowed second gear which I do not seem to have. I am thinking throttle pos'n sensor because it also shifts real hard when moving between drive and reverse.

I tried unhooking the battery terminals for a few hours to see if the problem would stop, but no dice. Fluid levels appear to be correct. A little help please.

Has your SES light ever came on? Tps could be bad, or one of your speed sensors could being going south on you.
SC