Quote:
Originally Posted by biketopia
What is your drive shaft situation like? I would originally think you have a problem with your flex plate and converter combo as there's some differences depending on the crank and what converter you use. the snout could be be hitting the crank, pushing on the pump causing it to fail. Also happens when the converter isn't fully seated. If your driveshaft is too long it will do a similar thing and push the internals of the trans forward as it goes over bumps and eventually take out the trans and the thrust washer in the engine.
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This swap is in a 72 Blazer. The 4l65e is mated to an NP205 using their adapter kit. There is a slip collar in the adapter between transmission and transfer case This appears to bolt together easily without any interference. The pump appeared to fracture into many parts like the converter has major runout at the snout.