1955 chevy rear end identification

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1955 chevy rear end identification

Send Private Topic View Profile. Tom, I'll go out on a thin limb on this one. Somewhere in the very rear of my feeble memory I seem to remember obtaining a ratio pumpkin out of a '55, 6-cylinder, 3-spd. I was "souping up" my '55 at the time, with a c. Not exactly a "scream machine" after I did all of this at 16 yrs. IF my memory is correct, and the pumpkin was indeed athat doesn't mean it was original to the wrecked '55 I obtained it from. Just my guess.

Thanks, David. Thanks George, I found it - BB Are the last 4 digits the date? Could it be red oxide? As far as I know, the diff housing was painted red oxide.

I even have a 3 speed out of a '56 that is red oxide and I've rebuilt a 3 speed overdrive that had evidence of red oxide on the outside AND inside.

1955 chevy rear end identification

That's quite possible Tom. The engine in it is a 56, and I just determined the transmission is a The tag is missing off of the diff. Just too weird that the new one would only be a week newer! Is there anything else on the vehicle that is dated that could be original? And it's correct that the early cars only had the center case painted red and NOT the housing itself I've never seen a good explanation as to why.

The top of the driver side of the frame rail may or may not have the VIN stamped in it. Execution time: 0. All times are GMT Pacific.

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Current time is PM Top. Attach Photos to Posts. Contact Us. My Cookies. Frequently Asked Questions. Forum Rules. I just recieved a complete rear banjo and it came from a wagon, 6 cylinder. As I recall, this would be a I find that odd for a 6 cylinder car. I havent cleaned off all the road grime so I dont know the code cast in to the housing. Think this could be a ?To say it was well received would be an understatement.

Some enthusiasts feel the 9-inch is a comparable replacement — and an acceptable swap into a Chevrolet muscle car — but when compared to the 9-inch, the bolt has a definite advantage. The 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 inthe bolt rearend became a staple for Chevrolet racers. The bolt was introduced to performance buyers in While it was originally designed for use in factory-built performance-rated cars, it was installed in both cars and trucks until AfterGeneral Motors was only installing its bolt rearend in cars, but the bolt remained an option for trucks until When looking at a bolt rearend, it is important to know that bolt axle assemblies use different components for cars and trucks.

This means parts are not interchangeable, which can come back to bite you later if you buy the wrong assembly. For instance, the truck bolt uses a smaller inner pinion-bearing 1. We recently saw this bolt at a swap meet. While it is a bolt, it is from a truck. The owner stated that it was not a Posi-filled rearend, and came with gears he believed to be around 3. Also, the offset for the ring gear is different. Another thing to consider is car axles will not work in a truck housing.

Trucks first started using bolt rearends in the G-series vans and C-series pickups. They were used until the end of production in Blazers from through also used this differential four-wheel-drive Blazers had it installed on the rear only. Early truck bolts had axles with 12 large axle splines. The differential carriers are also narrower than those in passenger-car units.GM differentials come in a wide range of sizes.

Click on a differential below to view photos, measurements, and carrier breaks, as well as applicable models, and available parts, for that particular fitment. Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website.

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How to Identify a Chevy Rear End

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Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website.The 7.

The control arm-mounting ears on top of this 7.

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But, did you know there is more than one style of bolt rearend? One is the small, 7. The 8. It first appeared in production cars as a corporate replacement for the 8.

It was used in different models by all GM divisions — with the exception of Cadillac. Although the 7. Inside, the ring-gear bolts are the same as the 8. Like most bolts, the axles are held in place by C-clips on the inner end of the axles. Date and location of manufacture are stamped in the axle tube, and this table deciphers the code.

If used in a daily driver or cruiser application, the 7. This is an 8. It is internally different from the 8. However, the gears will not interchange with a Chevy 8. The axle shafts are also held in place by four-bolt retainer plates at the outer bearing, not C-clips.

There were an untold number of 8.

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Again, this would be okay in a daily driver or cruiser application, but if installed behind an engine with horsepower numbers climbing into the range, you can plan on an eventual failure. While a carrier-bearing girdle is available for the 8. The easiest way to identify the 8.

Inside the 8. The pinion diameter is 1.

1955 chevy rear end identification

Like all Chevy bolts, the axles are retained by C-clips on the inner end of the axle shaft inside the carrier. If you find a rearend that uses a large spring perch like this, it is from either an X or F-Body.

While the 8. The easiest way to tell the difference is by looking at the brakes. All 8. The X and F-body spring perches come in two versions: mono-leaf left which is shallower than the multi-leaf right. Originally, gear ratios ranged from 2.

1955 chevy rear end identification

When looking at the housing from the rear, an 8. Most 8. The covers on the 8. The pinion shaft diameter is 1. Like the 8. These protrusions are larger than those on the 7.This Chevrolet 3. The bolt differential fits all passenger cars. We have inspected the ring and pinion so as to ensure minimal ware and tare on the differentials that we sell. Occasionally we pull in a positraction unit but most rear ends are the standard differential.

Hello, Guest! Toggle navigation. Description This Chevrolet 3. Customer Reviews 56 Chevy differential " Installed higher ratio differential for better cruise performance.

Good part at good price. Took my old differential in trade and also sold me an excellent front bumper at a good price.

GM 10-bolt Identification Guide. Know What You’re Looking At

Highly recommend! Part arrived in a timely fashion and in excellent condition. What a difference it made. Good part at a fair price. Highly Recommend. Questions and Answers. This is the first time we've been asked this question. Was this answer helpful? We have them all. You will need to call to find out if we have a 3. Thanks for letting us know. Category - - - Follow Us Southeast Chevy Parts.

First Name. Last Name. Chevy Year Please Select Chevy Model. Thank you!See all 20 photos. For decades the ' Chevrolet rear axle housing was the choice for many hot rods. After all, they were plentiful and since they were all parallel leaf spring applications there were only two small brackets to trim off before installing the rearend in the hot rod of your choice.

Measuring about 60 inches from flange to flange, they were a bit wide for early hot rods, which may explain the number of hot rods with some sidewall showing outside the fender in the '60s and '70s.

However that measurement was spot-on for many postwar cars so these rearends were among hot rodders' favorite rear axle swaps. At the time you got modern drum brakes, easy-to-find gear sets, and best of all, a price that was approaching free.

Pulling out the Rear End with FIRE - 55 Chevy Gasser

Of course that was 55 years ago, and today things have changed dramatically. The supply of original ' rearends has dried up and those who are found are, well, 55 years old. Pitted housings, non-limited slip, small axles, bearings, and drum brakes that are no longer modern, are all features you can find on a ' Chevrolet rear. As a matter of fact, not only have these rear axles fallen out of favor with early street rods, even the Tri-Five bunch is removing them in favor of a more modern unit.

It's a neat car with ample power and a great look but he wanted to improve the old Chevrolet's street manners. It was time for improved suspension and brakes along with a limited-slip differential to handle the horsepower under the hood and provide better handling through better traction. While the subject of our conversion is a '56 Chevrolet, it should be noted this swap would be very similar on all Chevrolets from and virtually any other car or truck with parallel leaf springs.

And if you are wondering, yes, Strange Engineering also has bolt-in rear axles for later coil spring cars.

1955 Chevrolet Truck Parts - Rear End

To that end, a bulletproof Strange Engineering S60 bolt-in rear axle was ordered, along with performance shock absorbers from Performance Online. The original parallel leaf springs are still the main components of the rear suspension, but we will have superior brakes and shocks improve driveability, along with a gear set that will handle all the horsepower we can throw at it. Back in the day, the bolt rear was king for the GM crowd, but today's modern motors can easily overpower the old bolt.

The S60 incorporates Dana 60 components. The 9. The S60 is equipped with strong spline axles so there is no need to upgrade axles and these rearends are available as complete units with no brackets, ready for your fabrication or there is also a long list of bolt-in housing for most popular cars.

The very cool aluminum rear cover is the crowning touch to a true performance housing. We ordered the bolt-in variety of the Strange S60 with a gear set, this way all the brackets were in place for our '56 Chevrolet installation. Inside we selected the Trac-lock limited-slip option and on each end of those big 3-inch tubes we have drum brakes but several disc brake options are available too. The installation was really very straight forward, being a true bolt-in swap. The only fabrication consisted of making new hard brake lines for the housing; the rest of the project was done with wrenches.

The process is simple enough that just following the photos will show you how easy the swap really is, but always remember the safety side of things when you are working under a car.

Axle housings are heavy so if you are working on a lift remember to put safety supports under the front bumper, and if you are working on jackstands be certain the vehicle cannot move after removing that rear weight. Use proper jacks and supports to raise and lower the housing and be certain the springs are completely unloaded before removing the shackles. Since removing the rear housing involves dropping both leaf springs now would be the perfect time to replace both the front spring-eye bushing and the rear shackle bushings.

We used a set of urethane bushings, U-bolts, and lowering blocks sourced from Performance Online.

'55-57 Chevrolet Rear Axle Housing - Bringing Up The Rear

Our new adjustable gas shocks are also from Performance Online and will go a long way to controlling those springs. These changes along with the additional grip offered by the limited-slip differential helped us reap substantial performance gains.

A quick test-run through our slalom course bears that out. Our times dropped dramatically.Most orders are shipped within 24 to 48 hours of receipt.

Product CES.

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View Product Details. Product CE Product J Application Notes: The application refers to the 1st series early models. Product WB Prevent costly damage by replacing rear axle bearings before they seize with this premium replacement rear axle bearing.

Product CS This is a heavy duty center support bearing designed for longer-lasting service life for high-performance applications to support the center of the driveshaft assembly. Manufactured from machined and polished billet aluminum Product T This also will fit the rear cover on these differentials Applications: This chrome rear end cover is produced in bright triple chrome plating and resemble the configuration of the original covers.

Your classic will look great with this high quality cover. Gasket sold separately. Product W Prevent premature bearing or brake failure! Replace cracked or deteriorated rear axle seals to keep gear oil and grease in the axle tube, where it belongs. Sold individually. Applications: This high quality, extra thick differential cover gasket for 12 bolt rear axles is manufactured to provide maximum sealing.

When installing a new differential cover or reinstalling your original, always use a new differential cover gasket. Special plated bolts to complete the installation of your chrome rear end cover. Fits both 10 or 12 bolt covers.


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