96stangV8

ok when u hardly press on the gas in my 96 mustang gt 5-speed (43,000 miles) in any gear there is a couple of poping noises comming from under the car most noticable at low rpms. I had a friend check it out and he thinks at the tail end of the tranny it could be the bearing?? and other suggestions and how much would the be to fix thanks o and love the web site great job