i got a 88 gt mustang and well the rear axle blew up is the easyiest way to say it, so a shop put a new axle on out of a 87 or 88 t-bird, well now on the freeway at about 70 mph, my cars at 2600rpms......ive been reading posts where people complain thats to high with there 3.73 gears. but i dont think the t-birds came with those gears right? anyone know what gears my 8.8 axle has?