Tranny Rebuild?

[93' Z28 Stoker]

I need to know a good place to get my tranny rebuilt.. its a A4. and i have the 700R4 instead of the 4L60E. and while i am there should i have them change my gearing.? and also i just put in 3:73 's and i need to recalabrate my speedometer. . but the jackass's as the dealership asked all there tech's for a half an hour and none of them could give me a straight answer.

[86RedRocket]

I believe the speedo gears are located in the tailshaft area on the trans. Maybe you can find some replacement speedo gears that would recaliberate the speedo.

[93' Z28 Stoker]

has anyone heard anything about Pro-Built Automatics out of Cali?