I rebuilt and upgrade my trans for under $300. Don't pay $2000 for a rebuild..........thats simply ridiculous! You can buy a fully built/upgraded transmission for $1200 shipped as long as you know how to take one out and put one in.
I did 3-4 z pack clutches, full seal kit, new band, molded 3-4 piston, molded forward piston, Trans go shift kit, corvette servo, new flexplate, rear main seal, oil pan gasket( about $190 in parts and another $100 in fluids) and a few months of time in my garage working on it off and on.
This made my truck shift great. Nice and firm shifts and crisp downshifts. Well worth the money and time in my view.
Contact Rhino on here. He hooked me up nice. See my sig