Is A 12 Bolt Rear End Strong?

When the 12-bolt rearend is properly assembled, it’s the strongest passenger-vehicle rearend Chevy ever produced. GM engineers designed the 12-bolt to be a durable piece that could handle the torque output of its big displacement engines.

How strong is a 12 bolt truck rear end?

Chances are your truck has a 12-bolt rearend, but if not, it’s fairly easy to get your hands on one. Not only are they common, but they can also be pretty solid when built correctly. In fact, they can stand up to around 800 hp, which is perfect for a street truck with some performance mods under the hood.

What’s better 10 bolt or 12 bolt rear end?

First, the 10-bolt’s pinion shaft diameter is 1.438 (25 splines) while the 12-bolt is 1.625 (30 splines) which makes the 12-bolt 13 percent larger in diameter and therefore stronger.

What is the strongest rear end?

The 9-inch Ford Rearend is the Strongest Rearend Out There—It’s All Due to “Hypoid Distance” 1] The 9-inch Ford has no differential case gear-ratio range restrictions; one differential accepts all gear ratios from the 2s through the 6s.

Is a Ford 9-inch stronger than a 12 bolt?

A Ford’s 9-inch ring gear is larger than the 12-bolt’s 8.875-inch ring gear. The Ford’s larger ring gear plus its greater offset relative to the pinion results in a tooth contact area that’s slightly deeper than a 12-bolt’s, making the Ford marginally stronger.

Why is a 12-bolt rear end good?

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 rear end ratio is best for towing?

between 3.55 and 3.73
The higher the ratio, the more revolutions per minute. Towing: For pickup trucks released after 2010, the best axle ratio for towing falls somewhere between 3.55 and 3.73. This range provides good acceleration for V8 gas and diesel engines.

What did a GM 12-bolt come in?

The GM 8.875-inch, 12-bolt positraction came in many 1965 to ’72 passenger cars. The pinion shaft on passenger cars’ differentials was 1.625 inches in diameter, and the cover was oval, measuring 10.9375 inches wide by 10.625 inches tall.

How can you tell if a 12-bolt is posi?

If you see springs in the window of the carrier, either coil springs like this or an S-shaped spring, it’s a Posi unit.

How much power can a 14 bolt rear end handle?

First appearing in 1973, the 14-bolt is one of the most used rear axles in the General Motors stable. Found under ¾- and 1-ton GM trucks, vans and SUVs, the 14-bolt received a max torque rating of 6,242 pounds.

Which is stronger a Dana 60 or a Ford 9 in?

The Ford 9-inch pinion is mounted lower in the carrier and has the greatest hypoid offset, which causes it to consume more power to drive it than the Dana 60 or GM 12-bolt. The Dana 60 has so much mass it too consumes a lot of power to drive (although many say it feels slightly less than a 9-inch Ford).

What rear end is good for racing?

Ford 9″– The Ford 9″ is definitely the most popular of the rear ends in drag racing. It offers good strength characteristics and the largest variety of gear choices. The thirdmember type center section allows a racer to have multiple gear ratios available and is much easier to change than a rear loading type rear end.

What rear gear ratio is best?

The most popular rear end ratio in trucks today is the 3:55, which sort of averages towing power and fuel economy. This is a good ratio for the occasional towing or hauling individual. For a person who tows more often, and heavier loads, the 3:73 or 4:10 may be more appropriate.

Who makes the best differential?

7 best automotive differential manufacturers using retro methods

• American Axle. American Axle was founded by Richard E Dauch in 1994.
• BorgWarner. BorgWarner is one of the renowned automotive supplier founded in 1928.
• Dana Inc. Dana Inc.
• Eaton Corporation.
• GKN.
• JTEKT Corporation.

Why is a Ford 9-inch rear end so good?

The Ford 9-inch is desirable because it has a removable carrier, which allows quick rear end changes. Many racers carry an extra carrier assembly with a different rear end ratio so they can try different combinations on the same day while at the track.

How much HP can a Dana 60 handle?

Additionally, the Dana 60 (S60) from Strange comes equipped with their beefy 35-spline alloy axles and carrier that can handle over 1,000 horsepower. A vintage Dana 60 like ours with its stock 23-spline axles and clutch-type Sure-Grip is limited to roughly 700 horsepower of sticky tire, strip action.

Is higher or lower rear axle ratio better for towing?

Higher numeric axle ratios require the driveline to spin more in order to turn the wheel once, but generally deliver more torque, which can improve off-the-line acceleration and help provide pulling power when carrying heavy loads or towing heavy trailers.

Is a higher differential better?

The lower the number, the faster the car will go with the same number of engine revolutions. The higher the number the better the car will accelerate, but at the expense of high speed cruising.

Is a spread axle harder to back?

The frame of a spread axle trailer has to be studier, making the overall trailer heavier. This leads to lower carrying capacity for the trailer. The increased wheelbase also makes it harder to back up.

What is the hardest gear ratio?

The Hardest Gear
This is expressed as 4.55 : 1 meaning that for every 1 turn I make of the pedals at the front, I will turn the back wheel 4.55 times. This is the gear I would use on the flat. It is going to take quite a lot of effort to get it moving, but when I do I will move quickly.

What is the 80/20 towing rule?

The 80/20 towing rule is a safety measure many RVers follow. Basically, the rule states that you shouldn’t tow above 80% of your max towing capacity.