My vss has failed and I need my truck until I can get it on a lift and find the right vss. I bought one from autozone but its not the right one. and nobody in town has it.

anyhow if I zero out all the shift speed's do we think it will rely only on the tps vs rpm setting and actually shift? Now it just hangs on first gear. My only concern is the downshift speed as it will never know how fast Im going.?