torque convertor

I have a broken tooth on my convertor, and have talked to Lenny and hughs about it. Lenny wants to build a new one for me , but said what I had sounded about right.
Hughs said $300 plus shipping both ways , to replace the ring gear. A new one like I have is around $580ish.
What would I do w/ the old one that only has 2 runs and about 6-700ish street miles on it ?-
It does seem about right, but I have severe traction problem. Am probly going to change front springs too.
What I`m wondering is if I went w/ a lower stall speed, to just below the cams power band, would it help traction by not being in the power band when I nail it-------so to speak ??
Not talking about a bunch below-------all opinions welcome---------
Trail beast ??