HELP Door jamb transmission TR code
ok I need to find out what transmission my 2000 v6 automatic has in it so I know if the shift kit I want will fit it. It says it will fit a 2000 v6 with a 4R70W transmission but not a 2000 v6 with a 4R75W transmission. How do I tell what one I have what is the difference? I looked in the door jamb and the sticker says TR: U I don't know what to think any help?
Blacking it out, MAC duel exhaust, SR CAI, Performance Automatic shift kit. And a long build list wrecked in July '14