If it is the flexplate, there is a little trick ive used for my ford and nova. I dont know if you can find 10mmx1.5 pitch all thread though. Pull 2 of the bell housing bolts( opposite sides of the block), thread in 6 or so inches of all thread in those holes, put a nut on the free end, remove the torque converter bolts, the remaining bell housing bolts, dipstick tube (plug hole), linkage and wiring. Then slide trans back on all thread, that supports the front and a jack supports under the pan. You can replace the flexplate without dropping the trans on the ground. When done slide back into place on the "guide pin all thread". Reassembly is reverse of disassembly.