so i was playing in a river bed today and found an old car with what looks like to have a ford 9 rear, so i pulled it out brought it home and pulled it apart, this is were i`m stumped the axle looks exactly like a ford 9 but it only has 17 spline axle shaft and the carrier looks like it is stamped GM. so i was just wondering if GM made an axle that looks like a ford 9 or do i have an older ford 9. the car was so crushed and beat up that i can`t tell forsure what it is.