if theyre anything like autos for the KA, they hold up to about 300 ft/lbs of torque for a few days, then they start slipping, esp when they get hot.
but putting a transbraked C4 in your car with the right stall and some real slicks, would be like hanging a huge sign on the side that says "Don't fuck with me."
So an auto probably wouldnt make it 1320 feet for me with almost 500 torque to the flywheel. The C4 would be nice but it will probably never happen in my daily driver. I have had the same SR tranny now for almost a year now. The longest I have ever had the same tranny and holding the most power I have ever had. Double SR syncros chryo treated seems to lengthen life expectancy alot. I was eating KA trannies every 6 months.