I'm looking to buy a 2005 Neon SRT-4 Stage 3 with 150K miles on it. The only issue that it has is that the guy says it grinds going into 2nd and 3rd gear. He said that if you put it in 2nd at 2K RPM and under it shifts fine, and for 3rd gear you have to get it just right for it to not grind. He also says that it'll grind going into gear but then stay in gear like normal. He says that the way to fix this is to get an extender kit. What do you guys think?