240 No drive after AW71 swap and accumulator mod
I have a 240 LH2.4 B230F+T and my AW70 recently died. It was slipping, shuddering, and eventually lost all drive. We topped up the trans fluid as it wasn't reading on the dipstick any more after its final drive, allowing it to idle as we filled it and checked the level. When it got to the right level on the dipstick, still no drive, wouldn't 'clunk' into gear at all. Oh well.
A few days later I went back to pick up my 240 as I left it at my mates place and when I started her up, it dropped into gear and we had drive! Drive around town for a bit, still very slippy and shuddering, but we made it home and lost drive AS we pulled into the driveway.
Sourced an AW71 that appears to be healthy, and I believe that it was fine when it was removed from its old home. Did the accumulator mod, made sure the pistons sat flush, all the bolts back in, the tubes in all the way, the shifting arm was in the same way, everything seemed fine.
Put the transmission in with a healthy AW70 torque converter, making sure it aligned with the oil pump correctly. Started her up, filled the fluid and took about 5 liters, had already filled the torque converter. After a while, the dipstick was reading between min and max, yet wouldn't drop into gear. Checked the selector linkage, that's all OK and in the right spot.
The only thing I didn't hook up is the kickdown cable. It's hanging freely in the engine bay at the moment, and the old one that we cut off is sitting in the holder.
Any thoughts on what the issue could be? I'm going to hook up the kickdown cable next time I'm at my mates place, but can't see why that'd cause the issue.
*Note I've posted to turbobricks as well.