2008 Scion tC Clutch and Transmission issues?
 

I have an 08 with a Stage 3 Clutch and headers and some kind of make shift CAI that the guy before me put on. when i got the car the guy said the clutch was touchy and boy was he right. the peddle went all the way to the floor when shifting. they I assume didn't know it has a manual peddle adjustment well fast forward I got that adjusted the best they could I replaced the throw out barring and put a new Stage 3 Clutch kit in it and slave cylinder. when I got the car back they said oh BTW you need a new fly wheel and my 3rd gear was locked out completely. before I did the replacement I could at least baby it into 3rd with minor scrapping now it's just locked out won't go in no matter what. double clutching rpm revs nothing helps it. 4 scraps some and 5th kicks out. what am I looking at here I've had several people look at it but they all don't know they say could be transmission gear oil low or needing changed, syncros out, need a new clutch or throw out baring but then I tell them they were just replaced.. I've been driving with 1, 2, and 4th gear but I'm concerned on the elevated rpms driving it that way will effect my engine.

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1. Pedal, not peddle; bearing, not barring.

2. Could be any of those things - super hard to diagnose on the internet. I'd start with the easy stuff like fresh fluid (1g's like Redline MT-90).
Likely is a bad synchro for third though - possibly from driving with low or incorrect fluid or general hotrodding.

3. Why do you keep putting in Stage 3 Clutches? Sounds like whoever built that car before you did not know what they were doing. Unless that car has a turbo or a 500-shot of nitrous
that you forgot to tell us about you do not need anything close to a Stage 3 Clutch; would be so much nicer to drive with a Stage 1 Clutch / lightweight flywheel kit.