First gear ratio has a lot to do with the strength of the ST10. I had a 904 iron case ST10 with the 3.42 first gear, which is the weakest of all the ST10s, but still a good transmission. 6 rings on the input shaft.
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Freddie
1969 Camaro RS/SS396 (427) 4 speed
Last edited by big gear head; 09-05-2022 at 01:33 PM.
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