© 2017 Power Automedia. Follow along as our employee Zach installs a GM 10 bolt rebuild kit from Motive Gear. 54

There were an untold number of 8.2-inch axle assemblies built, and although it is only marginally stronger than the 7.5-inch rearend, it does have some aftermarket support. Welcome to this interactive flange bolting calculator from HYTORC.The program computes recommended torque values , bolting patterns, tool selection and pump pressure settings for standard ASME B16.5 and API 6A flanges under normal assembly conditions. Ford 8.7" 14 to 19 in-lbs. Two It also uses a 10 5/8-inch irregular-shaped cover. It first appeared in 1970 production cars as a corporate replacement for the 8.2-inch 10-bolt rearend. //

//]]>. 2 Clampload is calculated at 75% of proofload.

The pinion nut should also measure 1 1/8 inches, if the OEM pinion nut is still in use.

Although the 7.5-inch 10-bolt closely resembles the 8.5-inch housing, you can positively identify the Chevy 7.5-inch rearend by measuring it. pressure wax as supplied on high strength nuts) = .10, hot dip galvanized = .25, and plain non-plated bolts … .006" to .010" 80 ft-lbs. 24

Clamp loads are based on 75% of the minimum proof loads for each grade and size. 0.5 Since it was so widely used, there is a better possibility of finding one of them at a salvage yard than locating a 12-bolt. Many times, if you locate a 10-bolt rearend, it’s usually a 7.5-inch unit.

26 The hydraulic wrench options are the premier Avanti® square-drive or Stealth® low-profile tools. ");b!=Array.prototype&&b!=Object.prototype&&(b[c]=a.value)},h="undefined"!=typeof window&&window===this?this:"undefined"!=typeof global&&null!=global?global:this,k=["String","prototype","repeat"],l=0;lb||1342177279>>=1)c+=c;return a};q!=p&&null!=q&&g(h,n,{configurable:!0,writable:!0,value:q});var t=this;function u(b,c){var a=b.split(". When designing a bolt pattern, it is important to have an understanding of the loads that the pattern will need to resist in operation as well as the way in which those applied loads will distribute among the individual bolts in the pattern. 14

pressure wax as supplied on high strength nuts) = .10, hot dip galvanized = .25, and plain non-plated bolts (as received) = .20. Again, this would be okay in a daily driver or cruiser application, but if installed behind an engine with horsepower numbers climbing into the 400 range, you can plan on an eventual failure.

The covers on the 8.5-inch rearends are often 11 inches round with a bulge on the driver’s side to accommodate the ring gear. 2.5 The date and location of manufacture coding changed in 1971. The 8.5-inch 10-bolt rearend is hugely popular because aftermarket carriers and gears are easily interchangeable. That being said, limited gear sets are offered for the carriers, especially if you plan to change gear ratios.

Most 8.5-inch 10-bolt rearends have two extruded, cast-in lugs on the bottom of the differential housing at the 5:00 and 7:00 positions. The X and F-body spring perches come in two versions: mono-leaf (left) which is shallower than the multi-leaf (right).

However, the gears will not interchange with a Chevy 8.2.

It was used in different models by all GM divisions – with the exception of Cadillac. 44 Another way to tell the difference between an 8.2 and an 8.5 rearend is to pull the cover and look at the bolt holding the spider gear crosspin. If you locate a rearend that has coil spring perches, it could be from a G, A, B-body, or El Camino.

You will also notice the large, flat, cast-in protrusions at the five and seven o’clock positions. The pinion shaft diameter is 1.625 inches and will have either 28 or 30 splines.

The 8.5-inch 10-bolt rearends have ten 3/4-inch hex head bolts with 7/16-20-inch left-hand thread bolts that hold the ring gear to the carrier.

Dry (re-use) 3.08 and numerically lower gears = 1.660-inch, 3.23 and numerically higher gears = 1.950- inch, 2.73 and numerically lower gears = 1.615-inch, 3.08 and numerically higher gears = 2.00-inch, 2.56 and numerically lower gears = 1.530-inch, 2.73 and numerically higher gears = 1.720-inch.

38 We'll send you the most interesting Chevy Hardcore articles, news, car features, and videos every week. 2.2 L S-10. (e in b)&&0=b[e].o&&a.height>=b[e].m)&&(b[e]={rw:a.width,rh:a.height,ow:a.naturalWidth,oh:a.naturalHeight})}return b}var C="";u("pagespeed.CriticalImages.getBeaconData",function(){return C});u("pagespeed.CriticalImages.Run",function(b,c,a,d,e,f){var r=new y(b,c,a,e,f);x=r;d&&w(function(){window.setTimeout(function(){A(r)},0)})});})();pagespeed.CriticalImages.Run('/mod_pagespeed_beacon','http://www.hytorc.com/app01/calculator/','8Xxa2XQLv9',true,false,'FfwiMyYtoRE'); The 8.2-inch 10-bolt has a smooth, round, lower-case area (no cast-in protrusions), with an 11-inch cover that has a diagonal protrusion at the top.  

The hydraulic wrench options are the premier Avanti® square-drive or Stealth® low-profile tools. The easiest way to tell the difference is by looking at the brakes. 50 The below estimated torque calculations are only offered as a guide. .010" to .015" 60 ft-lbs. The pinion nut should also measure 1 1/8 inches, if the OEM pinion nut is still in use.

1.5 * USE THIS THE DATA FROM THIS PROGRAM AT YOUR OWN RISK AND RESPONSIBILITY. 4 The program will work in standard U.S. customary units (inch) or SI (metric) units.

":"&")+"url="+encodeURIComponent(b)),f.setRequestHeader("Content-Type","application/x-www-form-urlencoded"),f.send(a))}}}function B(){var b={},c;c=document.getElementsByTagName("IMG");if(!c.length)return{};var a=c[0];if(! These protrusions are larger than those on the 7.5 rearend. Torque calculations are based on the simplified formula explained in the current version of ASME PCC-1, Appendix K. As gasket load requirements for standard flanges generally fall within the mid-range of the bolt loads, gasket stress has not been used to calculate torque values.

Chat Products to Compare (max of 3) X. That being said, it is not recommended for use behind engines that make a serious amount of horsepower. That way, you don’t unknowingly spend money on something you really do not want.

BOP stands for Buick/Oldsmobile/Pontiac.

When looking at the housing from the rear, an 8.5 will have two squared off chunks of casting hanging on each side near the bottom of the differential. Help is just a click away! 36 The 8.5-inch 10-bolt rearend was used in cars and trucks over a wide range of years. 60 ft-lbs. All 8.6-inch rears have disc brakes, and 8.5-inch units have drum brakes. K values: waxed (e.g. Metric Low Profile, LoaDisc ?

Originally, gear ratios ranged from 2.41 through 4.10. Date and location of manufacture are stamped in the axle tube, and this table deciphers the code.

6 to 8 in-lbs. [CDATA[ Since listing them all within this article is impossible, we’ll be focusing only on visual identification.

60 ft-lbs. * SAE J429 grade 8 bolts do not exceed 1-1/2″ diameter. 34 It also uses a 10 5/8-inch irregular-shaped cover.

For that reason, many enthusiasts are considering the 10-bolt.

1 While the 8.5-inch rearend was used on vehicles up to 1999, The 8.6-inch (8.625) was used on 2000 and later-year trucks.

20000, Nominal Flange Size ?

Please use the data from the program as a guideline only* This program will not produce appropriate results if you are dealing with non-standard flanges, or metal-to-metal machine or structural joints or where extreme temperatures or other unusual operating conditions or materials are being used. Call 800.979.0122, 7am-10pm, everyday. .010" to .015" 60 ft-lbs. Values calculated using industry accepted formula T = KDP where T = Torque, K = torque coefficient (dimensionless), D = nominal diameter (inches), P = bolt clamp load, lb. Track Order. (e in b.c))if(0>=c.offsetWidth&&0>=c.offsetHeight)a=!1;else{d=c.getBoundingClientRect();var f=document.body;a=d.top+("pageYOffset"in window?window.pageYOffset:(document.documentElement||f.parentNode||f).scrollTop);d=d.left+("pageXOffset"in window?window.pageXOffset:(document.documentElement||f.parentNode||f).scrollLeft);f=a.toString()+","+d;b.b.hasOwnProperty(f)?a=!1:(b.b[f]=!0,a=a<=b.g.height&&d<=b.g.width)}a&&(b.a.push(e),b.c[e]=!0)}y.prototype.checkImageForCriticality=function(b){b.getBoundingClientRect&&z(this,b)};u("pagespeed.CriticalImages.checkImageForCriticality",function(b){x.checkImageForCriticality(b)});u("pagespeed.CriticalImages.checkCriticalImages",function(){A(x)});function A(b){b.b={};for(var c=["IMG","INPUT"],a=[],d=0;d

That is the impetus for why we decided to put this swap meet/junkyard identification guide together. Proof load, stress area, yield strength, and other data is based on IFI 7th Edition (2003) Technical Data N-68, SAE J429, ASTM A307, A325, A354, A449, and A490. While the 10-bolt rearend’s lineage can be identified by the code stamps, which are usually on the passenger’s side axle tube, there are literally hundreds of potential codes for the three different 10-bolt rearend housings. We promise not to use your email address for anything but exclusive updates from the Power Automedia Network. The oval-shaped cover measures 8 5/16 inches by 10 9/16 inches. That’s usually proven when used in high-performance, high-horsepower applications.

52 ASTM A320 Grade L7, Number of Tools ? With the exception of truck differentials with 30-spline axles, and those carrying 2.41 and 2.73 gears (series two), the differentials will support all gear ratios without having to change carriers. Nickel and Graphite The 8.5-inch and 8.6-inch 10-bolt rears are stout and effective differentials that can handle more power than either the 7.5 or 8.2-inch rears. The Series 3 carriers are good for use with 2.73 and lower gears (numerically higher), so 3.08 and 3.73 gears work well.

.011" to .016" 60 ft-lbs.

Ford 8" IRS: 14 to 19 in-lbs. It is internally different from the 8.2 Chevy, but has the same external bosses and brackets. Contacts. Chevy Hardcore NEWSLETTER - SIGN UP FREE! Copper and Graphite



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