Quick Answer

Frequent Question How many splines does a 10 bolt have?

Inside the 8.2-inch 10-bolt, the ring-gear bolts have 9/16-inch socket heads with 3/8-24 left-hand threads. The pinion diameter is 1.438 inches, and has 25 splines. Like all Chevy 10-bolts, the axles are retained by C-clips on the inner end of the axle shaft inside the carrier.

What is the difference between a 10 bolt and 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 a 10 bolt front axle?

The GM 10 Bolt front axle was used on Chevy and GMC 1/2 ton and 3/4 ton 4×4 pickups from 1977 to 1987 and on Blazer/Jimmy, and Suburban SUVs from 1977 through 1991.

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

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

Is a 10-bolt rear end posi?

Ten-bolt rears came in both Positraction and non-Positraction versions. Although it would be much cheaper to find one with Positraction already, many aftermarket suppliers can sell you carriers, axles and gears to convert a stock non-limited-slip axle to a Positraction.

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.

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.

What does it mean to have 3.73 gears?

A numerically higher axle ratio provides a mechanical advantage to send more of the engine’s available torque to the rear tires (and front tires, in a four-wheel drive vehicle), but you pay the price at the fuel pump. So, a truck with optional 3.73 gears will tow a heavier trailer than one with 3.55 or 3.21.

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.

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 size is a Chevy 12-bolt rear end?

12-Bolts to Glory The GM 12-bolt debuted in 1965 and was mass-produced until 1972. It features an 8.875-inch ring-gear carrier held in place with two internal main caps. The pinion gearshaft measures 1.625 inches in diameter and is shimmed to achieve the proper pinion depth.

What is a 10 bolt rear end?

Identifying the 10-bolt axle is easy. The nomenclature actually refers to the number of ring gear bolts. The outer cover matches
10 bolts hold the cover onto the housing. This ring-and-pinion gear has suffered catastrophic failure.

Is a Dana 60 a 10 bolt?

There are rear axle and four wheel drive front steering versions of the Dana 60. It can be readily identified by its straight axle tubes, 10 bolt asymmetrical cover, and a “60” cast in to the housing. Gross axle weight ratings are often lowered by the vehicle manufacturer for safety and tire reasons.

How wide is a GM 10 bolt front axle?

The GM 10 Bolt front axle was used on Chevy and GMC 1/2 ton and 3/4 ton 4×4 pickups from 1977 to 1987 and on Blazer/Jimmy, and Suburban SUVs from 1977 through 1991. Front Cover: Oval with 10 Bolts. 11″ high x 10-1/4″ wide.

What size is a GM pinion nut?

1 1/8″ Socket, 7/8″ X 16 Thread.

What size is pinion nut Silverado?

Yukon Gear – Pinion Nut (Part No.

1 1/4″ socket, 7/8″ x 14 thread.

What size is the pinion nut on a 14 bolt?

10.5″ GM 14 bolt truck pinion nut. 1 1/2″ socket, 15/16″ x 16 thread.

How do I know if my GM 10 Bolt is posi?

Locate two lugs, or ears, extending out from the bottom of the gear casing approximately in the 4 o’clock and 8 o’clock position. This will firmly identify the unit as having come with Positraction from the factory.

How do I know if my rear end is posi?

How to tell if your vehicle is open differential or Posi limited slip …

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 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.

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.

How do I identify my GM rear differential?

If the ID tag or stamp is missing or unreadable, differentials can be identified by the number of cover bolts, the distinctive shape of the cover, the number of ring gear bolts, and ring gear diameter.

What are 3.55 gears good for?

PERFORMANCE: The larger the axle ratio number, the quicker the truck will accelerate. For example, a truck equipped with 3.55:1 axle gearing will accelerate faster than one equipped with a 3.31 axle ratio.

Are 410 gears good?

This equates to a greater amount of power transferred to the wheels. Installing 4.10 gears improves the car’s performance on the track but with negligible effects to the highway driving. If your car is equipped with an overdrive, you may not even notice a difference in gas mileage with the new higher gearing.

Are 373 gears good for highway?

The 3.42 is fine for towing smaller boats, plus you will get better gas mileage for everyday driving. If I were towing frequently on hilly roads, I might would go for the 3.73 for better gas mileage while towing, but the 3.42 should be fine with a 205.Are 3.73 gears good for highway?

3.73 Ratio 4.10 Ratio
Higher Top Speed Lower Top Speed