What vehicle has a 12 bolt rear end?
What vehicle has a 12 bolt rear end?
While original 12-bolt housings are becoming rare, Moser has stepped into the void with a brand-new housing configured for all the popular Chevy body styles. When the 12-bolt rearend is properly assembled, it’s the strongest passenger-vehicle rearend Chevy ever produced.
Why was the 12 bolt rearend introduced in 1964?
The 12-bolt positions the pinion-gear higher on the ring gear, which reduces the load on the pinion. This results in less parasitic loss from the friction caused as the gears mesh. Introduced in 1964, the 12-bolt rearend became a staple for Chevrolet racers.
What kind of axle does a 12 bolt Chevy have?
This is the Moser Engineering 12-bolt axle assembly. As you can see, the Chevy 12-bolt differential is one stout axle, and it was the rear axle of choice for GM muscle cars and many GM competition cars.
When did the Chevy 10 and 12 bolt come out?
History and Identification of Chevy 10 and 12 Bolt Chevy Differentials Chevy 10- and 12-bolt axle assemblies have been standard equipment on GM passenger cars, muscle cars, and trucks for decades. The rugged, reliable, and efficient Chevy 12-bolt has established itself as the preeminent rear differential for GM muscle cars since its debut in 1965.
When did GM stop using 10 bolt rearends?
After 1972, General Motors was only installing its 10-bolt rearend in cars, but the 12-bolt remained an option for trucks until 1987. When looking at a 12-bolt rearend, it is important to know that 12-bolt axle assemblies use different components for cars and trucks.
When did GM start using 12 bolt rearends?
Trucks first started using 12-bolt rearends in the 1965 G-series vans and C-series pickups. They were used until the end of production in 1987. Blazers from 1969 through 1981 also used this differential (four-wheel-drive Blazers had it installed on the rear only).
Is the rear end of a 12 bolt truck interchangeable?
Early truck 12-bolts had axles with 12 large axle splines. The differential carriers are also narrower than those in passenger-car units. They are not interchangeable. That doesn’t mean the truck rearend is not capable of receiving performance upgrades. To the contrary, aftermarket 30-spline differentials and axles are available.
History and Identification of Chevy 10 and 12 Bolt Chevy Differentials Chevy 10- and 12-bolt axle assemblies have been standard equipment on GM passenger cars, muscle cars, and trucks for decades. The rugged, reliable, and efficient Chevy 12-bolt has established itself as the preeminent rear differential for GM muscle cars since its debut in 1965.
How can you tell if a truck is a 12 bolt?
At a quick glance, you can also tell when you’re looking at a truck 12-bolt, because the rearend cover has an irregular shape. Early truck 12-bolts had axles with 12 large axle splines. The differential carriers are also narrower than those in passenger-car units. They are not interchangeable.
