Transmission on 1997 Ford F-150

My truck has recently started jamming into 2nd gear. This is the only time that the auto tranny does this. I changed the filter and fluid and this problem still persists.What are some of the possible problems and solutions? Please help.

Asked by for the 1997 Ford F-150
1 answer
Did you ever find out what was causing this problem? Was the transmission the problem?