[Formulajones]

The 12 bolts can be built pretty tough and handle more than given credit for.

Still running a stock GM 12 bolt in dad's goat with 764 ft lbs. of torque and 4100 lbs. race weight. It's been in the car for more than 30 years and raced with various 455's while pretty much being a stock 12 bolt. All I've done to that 12 bolt is install c-clip eliminator axles from Strange but they are still 30 spline. Those things are over 3 decades old LOL

Up until last year it was a stock GM posi unit that I put new clutches in way back then. Just last year it showed signs of slipping in the burnout box after 30 years of abuse so I upgraded it to a tru-trac last year, and at that time I bumped up the yoke to a billet 1350. Yes all that time it was a stock yoke and never broke. It was at this time he also removed the stock driveshaft for a beefier 1350 piece. I then installed a support cover on the rear too for a little added insurance. I don't even worry about it. Automatics are pretty easy on things.

So when you're talking about a Moser or Strange 12 bolt, everything about them is beefy to start with. The center casting is beefier, the axle tubes are slightly larger in diameter and also made from a thicker wall tubing. Inside the center casting has much larger main caps to hold the center section in place, the Strange 12 bolt I ran in my Fbody had billet caps, and you'll also notice more beef cast around the pinon bearing area. They've been improved greatly and as a result they are also a little heavier than a GM 12 bolt. You aren't going to break it.