T56 Conversion

dusterizer said

Was researching this also, on the T56 wiki ( Borg-Warner T-56 transmission - Wikipedia) it looks like vettes and f-bodies were 27 spline, and newer heavier T56s were the 31 spline, also "read" just online somewhere though, that the torque ratings of the transmissions were subject to certain components and could be rebuilt with with stronger parts, making the 27 splines more reliable up to the 450lb ft range?

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Vipers were 30 spline.

but yes, to answer your question, you can significantly upgrade it. The most common upgrade is the shift fork and pads. followed by upgrading to the Viper Mainshaft and input. But the biggest weakness in the F body T56 was the shift fork on the 3/4 gear. It was thin aluminum, had plastic shift pads and would wear out or break under hard shifting. Common upgrade is to replace that fork with a Titaninum one with bronze pads, roughly 150-200 bucks for the upgrade. Which mine will be doing. Later model T56s and Viper T56s had steel shifter forks which helped and that upgrade is only 60 bucks.