When you swapped the flywheel for the flexplate did you get all three parts installed? There is a spacer between the crank and flexplate, did it get back in there?

Did you have to pull the engine up to the trans with bolts? This part of the question is to insure the torque converter was fully engaged into the pump.

Cheers, Charlie
If It ain't broke, Modify it!
87 Montero turbo Converted back in Spring1989
95 Montero SR 3.8 DOHC Only one?
93 Pajero 3 door 6G75 Mivec with paddle shifted 5 speed
Then a Gen2 SR with full coil independent suspension.