klawittera

i have a 93 t/a and the torque converter wont unlock. I was wondering if anyone had any ideas what could be the cause.


Thank you

FTICONVERTERS

iTrader: (3)

hung lock up valve in the pump? bad solenoid? bad converter?

Greg

klawittera

I was going with the cheapest fix first, so i already replaced the TCC solonoid and thats not it, so it looks like i'm going to be disassembling my pump next.

Detroit Gearbox

When you removed/replaced the lu solenoid, did you push upward on the lu valve (located under the tcc solenoid) to see if it was stuck or moving freely. Its rare, but I have seen the springs break, and a small piece of spring get caught in the valve.
93 is pretty old.... fluid is still in good condition?

tug686spd

iTrader: (11)

Just had the same problem but mine ended up being the soleniod. I would rule out electrical problems first. With the transmition unplugged it should work in D (third gear only) and reverse. If the transmition works unplugged then you know you have an electrical problem somewhere.

klawittera

I unplugged it, and sure enough, it is still not working. I will have to take a look at that valve this weekend and see if its stuck. I appreciate the tips.

thanks