if you mean that it won't change into 4th gear then that is most likely to do with the valve body and accumulation of dirt.suggest that you drain pan and remove from tranny and have a look.

__________________
David S Poole
European Performance
Dallas, TX
4696880422

"Fortune favors the prepared mind"
1987 Mercedes Benz 420SEL
1988 Mercedes Benz 300TE (With new evaporator)
2000 Mercedes Benz C280
http://www.w108.org/gallery/albums/A...1159.thumb.jpg