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.
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 a 12 bolt axle?
The General Motors 12 bolt axle was used in GMC and Chevrolet pickups from 1964 to 1982. It is a semi floating rear axle with a 8.875″ ring gear. Its most notable weakness is the fact that it uses C clips to hold the axle shafts in place, but this can be remedied by an aftermarket C clip eliminator kit.
How can you tell a 12 bolt?
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 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 is the difference between a car and truck 12 bolt rear end?
They are two different rear ends, and the car is better in nearly every way. If I am not mistaken the 8.5 10 bolt is stronger in more ways too then the truck 12 bolt. The only things that make’s the 8.5″ & the Car 12-bolt stronger is the larger pinion stem diameter & only seen one break.
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..
Are all 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 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.
What is 12 bolt rear end?
In actuality, the term 12-bolt is due to the 12 bolts holding the ring gear to the differential. The coil spring mounts and the mounts for the upper trailing arms on the differential identify this as a Chevelle or Monte Carlo rearend, not one from a full-size car like an Impala.
Did Pontiac make a 12 bolt rear end?
Although Buick, Pontiac and pre-’67 Oldsmobiles used the same basic 8.2-inch 10-bolt differential (1967-’70 Oldsmobiles used the Olds-specific 12-bolt 8.5-inch differential), these are different from the Chevrolet 8.2 10-bolt offerings.
What is a nutted axle?
A nutted or bolt on axle would extend past the drop out to have a nut “bolted on”. A bolt in axle with have an axle that is the wdith of the drop out (in the case of a 10mm that’s normally 135mm) and then a bolt bolts “INTO” the axle and the bolt is what rests in the drop out to hold the wheel in place.
How many quarts is a 12 gauge bolt?
Registered. A 12 bolt should only take around 3 quarts until it comes out the fill hole.
What gear ratio is best for speed?
In the real world, typical street machines with aspirations for good dragstrip performance generally run quickest with 4.10:1 gears. Lower gears are required if the car is very heavy, or if the engine makes its power at the upper end of the rpm scale.
Is a 3.55 axle ratio good for towing?
It’s pure mechanics. BEST TOWING RATIO: In general, the best towing axle ratio for most of the post-2010 pickups is in 3.55 or 3.73. Those ratios provide very good acceleration with gas V-8s and diesels.
Is a 3.23 axle ratio good for towing?
The lower the ratio, the better the fuel economy and speed but lower the towing power. The 2021 Silverado 1500 provides two axle ratios: 3.42 and 3.23. If you’re looking for a higher towing capacity, choose the 3.42 rear axle ratio. If it’s optimal fuel economy you’re after, choose the 3.23.
