Happy T "5/6" Day

Illustration for article titled Happy T 5/6 Day

A burly six speed trans for (mostly) burly American V8s.

Put a lot of blades to a lot of old muscle car trans tunnels.

Designed by Borg-Warner for the Viper in the early 90’s, built by them until Tremec took over in the late 90’s.


Mostly rated at 450 lb-ft from the factory, can be upgraded to hold up to 1200 hp and 1000 lb-ft of torque and can be modified to have an oil cooling system.

0.5 sixth gear allows you to run a rowdy engine/rear axle ratio with some degree of economy.


Was the predecessor to the TR6060/T56 Magnum.

When you absolutely, positively have to powershift like a gorilla, accept no substitutes.


From wikipedia, here’s the all star cast of OEM installs.

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