Ford Transmission

[procut]

My '92 F-250 with has an A40D automatic (I think thats what its caled). The transmission was re-built at 87,000 miles. The truck now has 105,00 on it. Lately it has been what I would say "surgung" or "lurching". For example, you coast up to a stop sign and it "lurch" ahead. I talked to a mechanic about it and he said it is most liekly something called torque lock, meaning one of the valves in the torque converter has dirt in it / is sticking, thus the surging/lurching. My question, is there some kind of attitive I can add to the trans. fluid that may help this problem.

[Smalltimer1]

You have the E40D. The early E's ('89-'94) had problems with the shift solenoids and the torque converters. The valve bodies also were a little finicky as well. If I were you I'd have the transmission flushed and have fresh fluid and filter put in and see if that helps (start with the simple stuff first). If that doesn't help I'd investigate the valve body next.