Got frpp 3.73 put in today... hearing faint gear howl
So i got 3.73s ford racing gear from americanmuscle along with the install kit. Doing the heat cycle right now but when i am coasting at 50mph, i can hear a faint gear howl. Very hard to describe. When decelerating, i can hear it sort of winding down.
Any ideas why this could be happening?
I have an appointment with the shop next week because i dont think i am supposed to hear anything from my rear end.