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350 won't turn over with tranny attached


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Hey, guys.

 

I thought I posted this message this morning, but I guess I didn't hit the "submit" button :bonk:

 

Here's the problem in a nutshell. The engine will not rotate with the transmission attached in the car. With the engine removed and the transmission pulled off, the engine rotates and the transmission input and output shafts turn smoothly but with a little resistance. The engine will turn with the torque converter bolted to the flexplate, so there doesn't seem to be a mechanical interference there.

 

Anyone want to hazard a guess what could be going on?

 

Thanks,

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Guest drahgonking

before attaching trans make sure torque convertor is lined up with pump in trans put convertor on trans main shaft push in and rotate at same time convertor will slide into trans about 2inches or more giving you the clearance you need when you put trans up to engine you should have enough room to put your fingers between torque convertor and flexplate you then must pull torque convertor out of trans and seat against flexplate then just bolt up in about forty years of working on cars i have seen this problem alot hope i was of some help

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Okay, so I'm supposed to put the tc on the transmission first, THEN bolt the TC to the flywheel? I've been doing it the other way - attaching the converter to the flexplate, then sliding the tranny on. I suppose I probably did have something out of alignment then. I didn't have to force the issue when I attached the tranny to the engine - it just kinda slid into place. I hope that means I didn't break anything.

 

Thanks for the help, guys. If you can think to add anything, please do! This is my first automatic transmission in 20 years of wrenching, so I'm sure I'll do a lot of other boneheaded things!

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Guest drahgonking

replace the seal no matter how good it looks it is toast and put a little bit of trans fluid on the lip of the seal before putting torque convertor in and before replacing the seal put the convertor into the trans make sure it engages and turns freely there will be some drag to it but it should turn hopes that helps you

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Thanks for all the help, guys. The problem was indeed that the notches on the converter weren't aligned properly with the transmission pump. I didn't even see the keys on the pump until I got down there with a flashlight and looked close! I attached the transmission loosely and turned the crank until the keyways lined up and notched into place, then I torqued everything down.

 

Thanks for the advice on the tranny seal, drahgonking. As long as it's out of the car, this would be an excellent time to replace it. Any idea on how much of an ordeal that might be?

 

Thanks again -

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