Hmm talk about crappy luck...three days after I buy my car..its starts grinding in 3rd even when the clutch is in all the way which really pissed me off.

Kinda confused because sometimes when its cold out it would grind but im almost positive that the syncronizer for 3rd is gone...I know what it does but how does one actually give out like it did....can anyone clear this up for me....good thing the cars under warrenty