Tranny in limp mode tried everything HELP!!

I have a 1994 LHS. I bought it with the tranny like this, not knowing anything about them. I changed the input and output speed sensors, tranny fuid and filter. Didn't fix the problem. Then I changed the tranny. Still not fixed. I have spent so much time and $$. I just want to get it right this time. Now I've read about limp mode and don't know what to do. Can anyone help??

I have a 95 LHS and 2 months ago it went intolimp mode and a local mechanic shop fixed for a couple of hundred dollars. don't got all the details but it had somthing to do with the wiring harness i think it got fried and they either fixed it for replaced it.

did you put af mopar tranny fluid in it, also I had same problem with mine , put lucas stop slip and cleared right up