The problem is your torque. The T56 and the Tremec are both rated at less than 450 foot lbs of torque. Neither is designed for the quarter mile. They are track based transmissions.
The viper T56 has much beefier gears. I understand a unit configured to run in a high torque Mustang goes for about 3900.00. Get a scatter shield, I have had friends survive exploded clutches for their 275.00 investment, while those that gambled have lost toes, feet, or an entire LEG! Some unfortunates have lost their lives.
I think this is money VERY WELL SPENT! But for launching a car at the quarter mile, I would go a Lentco AOD. These are good to 750 HP and will reduce parts breakage.
Now if you are a street highway driver, and not a ham handed quarter mile burn artist like me, then the World Class T-5 will probably work out great for you. Most of the wear is in the syncros, and a replacement kit for these is under a 150 bucks. You can rebuild this unit yourself.
The TREMEC is the unit I am considering. I have friends running these behind 426 Hemis and 440 wedge Magnums without any breakage. They should be good for my small block.
What clutch are you running now, and if you quarter mile it, what RPM do you launch at?
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1966 Customized for daily street and highway domination. 358 Windsor running 425 HP
C-4 Auto and 3.25 Posi
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