10 bolt to 12 bolt or 14 bolt???

[team39763]

The jump from 28spline(10bolt) axles to 30spline(12bolt) isn't worth it?  I believe you guys that the 12bolt isn't that much stronger, but why are 12bolts so popular in the car world?  I'm always hearing about Moser 12bolt or Strange 12bolt.

[1sxychvy]

well I decided to just keep the 10 bolts under there and rebuild them once.. Its going to be pretty much a street queen and if they break then I'll step up to 3/4 ton axles... thanks guys for you input!

How much do you think I could get for the 12 bolt? 50 bucks?

[SUX2BU99]

The fabled GM 12 bolt rear end used in the passenger cars is not the same as the one used in the trucks. I believe the ring gear was larger in the car 12 bolt, and generally-speaking this is part of the reason why they were stronger. I'm sure somebody more well versed in rear diff's will chime in on this one. Both the car and truck diffs used 12 bolts to hold the ring gear to the carrier, and had 12 bolts on the diff cover but I believe that's where the similarities ended. 

Funny though, Strange Engineering has said that the GM car 12 bolts aren't really a great platform to build a truly strong high power handling rear end from. They choose to build their big-power units from Ford 9" or Dana 60 platforms.

$50 should be easy to get for a truck 12 bolt. I'd ask $100. In fact, I am for mine

[Captkaos]

It is the pinion that is bigger on the passenger car 12bolt.  It is equivalent to the 10bolt