Cpt. Howe

Hey guys, I have an '81 F150 and I want to get a limited slip locker for it but I'm not even sure if they make one for my rig. any help in regards to this would be terrific. If you can help me figure out what diff I have too that would be fantastic. The axle code on the info plate inside the door is Axle: 15

1979f150lifted

just put a 9inch under it. if its not a 9inch already. the make plenty of lockers for a 9inch rear. probably the most common rear axle.