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Old 12-19-2008
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Gears vs spline count

I've been searching and can't find what I'm looking for. I am looking into buying some 4.88's. I currently have a 28 spline 8.8, looking to get a 31 spline in the future.

Would the gears be interchangable between the 28 and 31 spline axles? or would I need a new pinion?

Last edited by seed60; 12-19-2008 at 10:56 AM.
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Old 12-19-2008
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No all the internals are different between the two. If you want the gears now just do a disc conversion to the 28 spline or wait to regear when you have the 31 spline.
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Old 12-19-2008
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Originally Posted by 98liftedranger View Post
No all the internals are different between the two. If you want the gears now just do a disc conversion to the 28 spline or wait to regear when you have the 31 spline.
Gotcha. I thought only the axles and pinion would be different.
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Old 12-19-2008
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The 28 spline gears will work, in a 31 spline housing, you will just need to change the ring gear over to the 31 spline carrier when you do your rear axle swap.


Buy the gears for your 28 spline, and switch the gears to your 31 spline when you get it.

It is the exact same ring and pinion between the 2 axles.
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Old 12-19-2008
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Originally Posted by ranger View Post
The 28 spline gears will work, in a 31 spline housing, you will just need to change the ring gear over to the 31 spline carrier when you do your rear axle swap.


Buy the gears for your 28 spline, and switch the gears to your 31 spline when you get it.

It is the exact same ring and pinion between the 2 axles.
Thats sort've what I was thinking, I just thought that the spline count was different, and that the 31splines had larger axle shafts/tubes.
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Old 12-19-2008
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Originally Posted by freddie View Post
Thats sort've what I was thinking, I just thought that the spline count was different, and that the 31splines had larger axle shafts/tubes.
exactly
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Old 12-19-2008
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I might as well wait until I find a 31 spline before I get anything installed.

Thanks for the info.
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