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By Ron Tron - 11 Years Ago
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I have a Y block with a foromatic tranny.....not sure of the year because its in a 36 ford pickup when I bought it and the previous owner was clueless.
anyway the last time I rebuilt the engine I thought i had a rod knocking and it turned out to be the flex plate slipping. Lately it has been making the same noise only when its cold or on cold start ups.........and now the starter won't turn over the engine and I hear this banging and locking sound when I try to turn it over. I even bought a new battery thinking that was the problem and hooked up jumpers and ran two batteries to it.......but it just keeps laboring and then locking up on a bang or loud clank......My friend told me its sounds like the starter but I don't want to replace that if the flex plate is going to do it again the the new starter .......Help!
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By NoShortcuts - 11 Years Ago
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I'm aware of two different styles of flex plates used with the Fordomatic transmissions.
One was used with the air cooled units (look for a finned aluminum torque converter) and the other was used with the later trans that ran the cooling lines to the radiator. The later oil cooled Fordomatic transmissions (April '56 up, IF I remember right) have a smooth steel torque converter.
You may have more than one thing going on, too. A loose flex plate where it connects to the torque converter is a possibility... cracked or broken 'tabs where the flex plate connects to the torque converter are a possibility if things were loose and have been 'working'. You also may be having trouble with the Bendix on the starter... and if that's been acting up the ring gear on the torque converter may have gotten chewed up.
Now that I've come-up with some awful things that can happen, you need to remove the inspection cover from the bellhousing and see what you can see.
Hope this is of some help. 
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