Re: Mustang standard transmission chattering upon cluth engagement....
There is a number of causes to this problem. First, you must remove the tranny and inspect for broken, worn, or loose parts such as: (1)the splines on the input shaft of the drive shaft; (2)cracked, damaged, or worn pressure plate or fly wheel; (3) the diaphram spring may be exhausted; (4) or simply dirt, debris, and oil saturated on the clutch plate. With the milage on his Stang, a careful inspection needs to be accomplished. Replace parts as necessary.