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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Rear Drivelines, Drive Axles and Gearing => Topic started by: 81Cheyenne on June 17, 2008, 03:01:27 pm
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I bought a used posi unit and was told that it was 28 spline. Well guess what....after I got it home and counted the splines: 30 splines. >:( It's going in a 81 C10 10 bolt that currently has 28 spline axles. Looks like I might be stuck with this posi so my question is: Can I swap out the 28 spline axles for 30 spline axles? Will they interchange?
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Nope. Are you saying you wanted to just swap the axle shafts for a different lug pattern?
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Are you saying you wanted to just swap the axle shafts for a different lug pattern?
Nope. I just wondered if I can swap out to 30 spline axles to go with the 30 spline posi that I'm stuck with instead of selling it and then finding a 28 spline posi. I would stay with 5 lugs.
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Did you buy a 12 bolt rear end? As far as I know, the 10 bolts had 28 splines and the 12 bolts had 30 splines. Why not just swap the entire diff out for the new one? Oh wait, I'm now thinking that you only bought the posi unit itself and not the entire diff, right?
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Right. It's a 8.5" carrier tha fits a 10 bolt rear end