[Christ]

Originally Posted by Big Dave

Lock up the TC and you cut the flow of ATF to the cooler. Heat builds up and expensive and often spectacular (a trail of parts and fluid scattered down the road) transmission failures follow.

Face it: The automatic was never intended for hypermiling. The manual transmission is far superior.

I'm not sure about this... I try to get locked up as quickly as possible, and accelerate under as much load as I can put on it without unlocking... I've never had a problem w/ my transmission.

Why would locking the torque converter into 1:1 operation cut ATF flow when you're still turning the pump?

I'd think that if that was true, many people would have highway transaxle/transmission failures, no?