Quick Answer

Question: 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.

Are 10 bolt and 12 bolt axles the same?

12 bolt axles have 30 splines, 10 bolt have 28, but yet both axles are the same lenth and diameter. That means that if the 10 bolt had a 30 spline carrier the 12 bolt axles would bolt in.

What is the advantage of a 12 bolt rear end?

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.

Are 10 bolt rear ends strong?

That’s usually proven when used in high-performance, high-horsepower applications. But for all intents and purposes, the 10-bolt rearend is a great unit for a street/strip car, and can be stout enough to handle even the occasional abuse delivered by use at the racetrack.

Is Posi the same as limited slip?

Registered. Posi and limited slip are both the same thing. Standard rear end “Peg leg”, both back wheels always propel the car but the power goes to the wheel that spins the fastest. So if one side spins out, all the power goes to that wheel..

How much horsepower can a 8.2 10 bolt handle?

Roughly 550 to 600 HP total. No slicks, drag radials. No problems with the 8.2 at all. I used the stock diff., the Auburn would be better.

Are all GM 12-bolt rear ends the same?

A different 12-bolt differential was used for light truck applications, but those 12-bolt units are not directly interchangeable. You can identify a truck differential by the smaller, 1.438-inch diameter pinion shaft and the size of the rear cover, measuring 10.875 inches by 10.875 inches.

What is a GM 10 bolt?

The GM 10-Bolt semi-floating rear axle has been in use for over 40 years. It’s been used in passenger cars, and light duty pickups and SUVs over the decades.

How wide is a Chevy 10 bolt rear end?

MEASURED ACROSS WHEEL MOUNTING SURFACE

Year Classic Vehicles Width Rear
55-64 Chevy car
65-67 Nova
68-72 Nova 60″
78 & up Monte Carlo, Regal, etc. with 10 bolt axle 58″

What is the strongest rear end?

Dana 60 Rear End Assemblies

If you want a big brute of a rear end under your car, look no further than a Dana 60. Even in the heyday of muscle cars, Dana 60 rear differentials were renowned for their strength, along with their difficulty to locate.

What’s the best rear end for drag 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 is a good gear-ratio for a street car?

If we have a daily driver, 2.55 to 3.25 gear ratios typically work best, whereas a street/strip application we would usually use a 3.42 to a 3.90 gear ratio, and race applications most commonly use a 4.10 and above gear ratios.

Will a Tahoe rear end fit a Silverado?

No. You shouldn’t try fitting a Silverado differential into a Chevy Tahoe.

What year s10 has 8.5 rear end?

According to Chevy High Performance, the 7.5-inch was standard until 1993, when the previously optional 7.625-inch became standard. 1995 and newer S-trucks equipped with the high-output V6 were equipped with the 8.5-inch rear end.

What rear end do I have in my Chevy truck?

You can typically find your RPO code on driver side door panel or glove box. General Motors rear end differentials are referred to by the diameter of the ring gear, i.e. 7.5 inch, 8.5 inch, 10.5 inch.

Is Posi Trac better?

In a positraction differential, the unit senses which wheel has the greatest traction, when one tire is slipping or stuck, and sends power to that wheel. Power to the other wheel continues until equal control is returned to both tires. Positraction is beneficial when road conditions are wet or muddy.

Which is better limited slip or locking differential?

Limited slip differentials provide your vehicle with the best traction around. Locking differentials might give you good traction too, but the traction that you will experience with limited slip differentials is better. For starters, they will make it easier to turn on roads which are slippery and wet.

How do I know if my rear end is Positraction?

If you can turn the wheel on your side while the other wheel is held still, the rear differential is not a Positraction unit. If you cannot turn the wheel on your side while the other person is holding their wheel in place, then the axle is a Positraction.

How do you narrow a GM 10 Bolt?

Dave, You can narrow a 10 bolt by getting a donor rear (8 3/4 Mopar works good) and narrow the donor axles and put the chevy spline on the end. Then use the donor axle housing ends, brakes, etc and you have a much stronger rear and bigger brakes.

How do I identify my GM rear end?

Locate the GM manufactured rear-end casting date on the housing. It is located at the base of the housing, on a flat surface facing upwards. It consists of a letter and three numbers, i.e., A141. The first position, “A” represents the month of manufacture, in this case, January.

How do I identify a GM 12 bolt rear end?

The easiest way to identify a 12-bolt rearend is obviously by the 12 bolts holding the rear cover onto the axle housing. The pinion shaft on passenger-car differentials is 1-5/8-inch in diameter and the cover is oval, measuring 10-15/16-inches wide by 10-5/8-inches tall.

What rear end came in a 57 Chevy?

Automatic 57 cars (both 6 and V8) came with 14inch tires and 3:36 rear gears. Stick shift 57 cars came with 14 inch tires and 3:55 gears.

What is 10-bolt rear end?

The 10-bolt differential cover is located on the rear of the axle and is an 11-inch x 10.25-inch oval. An important thing to note is that the ring gear bolts are . 4375-inch left-hand thread on all 8.5-inch differentials.

What size is the pinion nut on GM 10-Bolt?

PYN10 – 10-Bolt 8.5″
Pinion Nut (30 Spline Pinion)

How do you adjust the gears on a GM 10-bolt rear end?

GM 8.5 10 bolt gear setup and final assembly

How do I know my differential gear ratio?

Method 1: Count the number of teeth on the ring gear and the pinion. Divide the number of the ring gear’s teeth by the number of the pinion’s teeth. This will give you the axle ratio.

How wide is a 62 Nova rear end?

It measures 53″ from the outside of the brake backing plates. Two drums would add aprox. 5″.

How wide is a S10 rear end?

Finding a good rear end for your project: S10 2WD’s have a drum to drum mounting width of 54.5″ which is perfect for a T-Bucket with larger back wheels. The Blazer and 4WD models have about 4.5-5″ more overall width and works well for 26 and newer fender-less roadsters, and 23 style T’s with narrower rear wheels.

How wide is a 1965 C10 rear end?

Re: 1965 C-10 rearend width backing plate ==&gt
backing plate

The width of a C10 12 bolt from ’63 to early ’70 is 62″ WMS to WMS. From late ’70 thru ’87 the width increased to 63.5″ WMS to WMS. The 12 bolt truck differential can hold up to a lot of hp/tq when built right.