I use a 1/2 inch ratchet with ~ 2" extension on the crank bolt. I forgot the socket size ~ 32 mm?

I don't remember an issue with turning the torque converter. It spins independently of the engine???

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85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do.