hey i'm posting this for my dad. he has an 04 mach 1. around 250mi on it. he says it squeals. when he depresses the clutch it goes away. is this the throw out bearing? also is this common for mach's? i remember when i bought my 87 5.0 i threw a motorsport hd clutch in it, and at the time people were saying those were prone to do this. luckily mine didn't. i guessing the mach's have a differnt clutch than the gt's. his clutch is harder to push in than mine. is this normal also. thanks guys.