the car is a 1997 NPI mustang gt , i was over taking someone and down shifted to 3rd ran it to 5.5k rpm and shifted into 5 and when i was coming out to a turn slowing down , the car started knocking below 2k rpm , the knock goes up slightly with rpm but completely disappear past 2k as if it never happened.
what would cause that? and how can it be fixed
what would cause that? and how can it be fixed