Not best, but optimum Transmission?

Hmmmmm … while the transmission is out, is it worth considering to replace the torque converter? If you remember back in the beginning of this thread, I mentioned that I'm not auto transmission expert. So, I'm allowed to be ignorant and ask dumb questions! :D I have read and believe that the 727 is the best 3 speed auto available. But is the torque converter it comes with the best?

For example … if a had a lockup torque converter, that would lower my rpm while doing interstate cruising. However, I believe I read that torque converters cannot interchange between a non-lockup and lockup converter because the transmission input shaft and valve body used for lock-up application are different. But how big of an expense or is it even possible to change the input shaft and valve body on a 727? I would imagine the input shaft is not an easy thing to change. Aside from that, are there other torque converters that may be more efficient? And/or robust? Neglect the cost of said converters for this argument. I won't be spending an arm and a leg, but I prefer to know the costs even if they're on up there. Because I might consider spending just an arm … or a couple fingers at least.

I'm going to try to google some torque converter info and learn myself. Feel free to school me on TC 101. Thanks.


7milesout