volvo c70 autobox lost drive

Lost drive on a 2000 model c70 2.0 turbo.Orange upright arrow permenantly flashing.TCM fault code reads (P0740) which means torque converter clutch circuit malfunction.ATF level and colour is normal,however when you start from cold the car will move 100yds and loose drive again.Any thoughts or experiences of this sought will be very helpfull.Thanks in advance guys!!!

I tend to agree, the generic P code is not very useful. Maybe a scan at the dealers to get the Volvo code will help, but lost drive does suggest a mechanical problem within the box.

Hi Chris, All the codes have been read and deleted,the car did drive up the road and back there is no more flashing arrow and the management light is gone off. However after parking it has lost drive again. Now would volvo be able to read TCM considering there are no lights lit on dash any more is it possible the data may well be stored within. Could it be possible for the solenoid that controls torque converter failed ? Not too good when it comes to autoboxes any views or sugesstions would be very helpfull (THANKS)

Hi Chris, All the codes have been read and deleted,the car did drive up the road and back there is no more flashing arrow and the management light is gone off. However after parking it has lost drive again. Hmmmm? Now would volvo be able to read TCM considering there are no lights lit on dash any more is it possible the data may well be stored within. It's possible but may require some more driving, however that risks further damage. Worth trying to get the Volvo codes read I would think. Could it be possible for the solenoid that controls torque converter failed ? I guess it's possible but usually results in hard shifting rather than no drive. I guess it would not cost too much time to remove the electrical connector on top of the box and check for obvious wiring problems. Also check the PNP switch, I quick cure is to run the gear lever back and forth about 20 times with the engine off to clean it's internal contacts, not always successful or long lasting though. Electrical checks for the four speed box are forther up the thread. Is this a four speed (Turbo) or five speed (NA) box? Not too good when it comes to autoboxes any views or sugesstions would be very helpfull (THANKS)

Hi chris, It is the four speed turbo box,i guess your right the (P) codes are not very specific. Any idea where to get a wiring diagram !!!!!!!! Links e.t.c P.S thanks for the tip on PNP switch (no joy)