Dry (New - First Use) These have been around since 1975, and were installed under cars, small trucks, and vans up to the 2005 model year. Head bolt torque refers to the amount of rotational force that must be applied to the cylinder head bolts for a safe and secure connection either to the engine block or another cylinder head depending upon the engine. We'll send you the most interesting Chevy Hardcore articles, news, car features, and videos every week. Grade 2 calculations only cover fasteners. Four 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. pressure wax as supplied on high strength nuts) = .10, hot dip galvanized = .25, and plain non-plated bolts … .011" to .016" 60 ft-lbs. ASTM A193 B16 Build your own custom newsletter with the content you love from Chevy Hardcore, directly to your inbox, absolutely FREE! 2500 API SA Greases K values: waxed (e.g. Clampload is only a estimated number, there maybe situations where the engineer calls for the bolts to be tensioned to a different value. 3 This is done to allow a safety buffer so that the bolt does not get too close to the proofload value. Inch No, Lubricant ? Machine Oil Portland Bolt provides anchor bolts and nonstandard construction ASTM A320 Grade L7, Number of Tools ? Chat Products to Compare (max of 3) X. [CDATA[ If it takes a 5/16-inch wrench to remove it, it’s an 8.5. There is an anomaly to the “corporate” 8.5-inch axle assembly that was used in some 1971 and 1972 Buick, Oldsmobile, a few 1969 through 1972 Pontiac vehicles, as well as the 1970 through 1972 Monte Carlo. It first appeared in 1970 production cars as a corporate replacement for the 8.2-inch 10-bolt rearend. Dry (re-use) While a carrier-bearing girdle is available for the 8.2-inch rearend – and does give some support to the housing – it doesn’t provide a reliable and suitably strong solution. The pinion diameter is 1.438 inches, and has 25 splines. Ford 8" IRS: 14 to 19 in-lbs. //]]>. Metric Hytorc Division Unex Corporation, its subsidiaries, employees, contractors and assigns shall not be responsible for the use or mis-use of any data or advice provided or for any injuries or damages resulting from anyone's reliance upon such data or advice. ASTM A193 B7 52 K values: waxed (e.g.   18 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. Like most 10-bolts, the axles are held in place by C-clips on the inner end of the axles. 54 8 to 10 in-lbs. 0.75 38 46 Since listing them all within this article is impossible, we’ll be focusing only on visual identification. The axle shafts are also held in place by four-bolt retainer plates at the outer bearing, not C-clips. HYTORC offers the latest hydraulic bolting technology with unique patented benefits that provide industry-leading safety and accuracy. 26 36 The control arm-mounting ears on top of this 7.5 rearend denotes it is usable for any 1978-’88 GM A or G-body intermediate like a Cutlass, Monte Carlo, El Camino, Malibu, Regal, or Grand Prix. HYTORC Bolt Patterns Four Machine. Square Drive 60 ft-lbs. 3.5 2.5 The hydraulic wrench options are the premier Avanti® square-drive or Stealth® low-profile tools. It is internally different from the 8.2 Chevy, but has the same external bosses and brackets. 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. If sticky tires are used, you’ll quickly turn the 7.5-inch rear into a pile of unusable parts. 10000   Nickel and Graphite Other. If it takes a 1/2-inch wrench to remove it, it’s an 8.2. .010" to .015" 60 ft-lbs. 80 ft-lbs. 58 6 to 8 in-lbs. 1 Proofload is the published number that full size headed bolts are tested to. 2 One is the small, 7.5-inch, another is the 8.2-inch, and yet two more are the 8.5 and 8.6-inch. The pinion nut should also measure 1 1/8 inches, if the OEM pinion nut is still in use. We promise not to use your email address for anything but exclusive updates from the Power Automedia Network. But, did you know there is more than one style of 10-bolt rearend? 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. ("naturalWidth"in a&&"naturalHeight"in a))return{};for(var d=0;a=c[d];++d){var e=a.getAttribute("data-pagespeed-url-hash");e&&(! 5000 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. That way, you don’t unknowingly spend money on something you really do not want. 60 ft-lbs. Use of its content by anyone is the sole responsibility of that person and they assume all risk. Two RECOMMENDED ASSEMBLY TORQUES Class 10.9 ISO Metric Coarse Pitch Bolts & Screws Bolt Tension Recommended Corresponding to Assembly 65% of Proof Load Torque kN Nm 7.67 8 10.9 13 19.8 32 31.3 63 45.5 109 62.1 174 84.5 270 103 371 132 528 164 722 190 914 248 1339 303 1817 To convert kN to lbf: Multiply kN by 224.809 To convert Nm to lbft: Multiply Nm by 0.737562 371 2449 441 31173 … Incredible repeatability, reliability and durability HYTORC’s hydraulic bolting systems are the original torque/tension machines. API 6A, Flange Class ? The hydraulic wrench options are the premier Avanti® square-drive or Stealth® low-profile tools. 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. .006" to .010" 80 ft-lbs. HYTORC Sales & Service . Sign up for our bi-monthly email newsletter for all the latest! Follow along as our employee Zach installs a GM 10 bolt rebuild kit from Motive Gear. The X and F-body spring perches come in two versions: mono-leaf (left) which is shallower than the multi-leaf (right). Good luck finding one of these, however, as they are very popular among performance enthusiasts. Finding a 12-bolt that is “affordable,” is getting to be a nearly impossible endeavor. Values calculated using industry accepted formula T = KDP where T = Torque, K = torque coefficient (dimensionless), D = nominal diameter (inches), P = bolt clamp load, lb. All rights reserved. 6 to 7 in-lbs. The easiest way to tell the difference is by looking at the brakes. We will safeguard your e-mail and only send content you request. ASTM A193 B7M The user must have all suggested values checked by a qualified engineer for accuracy and applicability prior to implementation. (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'); Inside, the ring-gear bolts are the same as the 8.5 corporate unit, but the pinion-shaft diameter measures 1.438 inches. It also uses a 10 5/8-inch irregular-shaped cover. Torque has been converted into ft/lbs by dividing the result of the formula by 12. Inside the 8.2-inch 10-bolt, the ring-gear bolts have 9/16-inch socket heads with 3/8-24 left-hand threads. Ford 8" (Drop Out) 12 to 14 in-lbs. Low Profile, LoaDisc ? All calculations are for Coarse Thread Series (UNC). All 8.6-inch rears have disc brakes, and 8.5-inch units have drum brakes. (function(){for(var g="function"==typeof Object.defineProperties?Object.defineProperty:function(b,c,a){if(a.get||a.set)throw new TypeError("ES3 does not support getters and setters. 12 If used in a daily driver or cruiser application, the 7.5-inch rearend should survive behind an engine with 350hp, if traction is limited during spirited driving. For that reason, many enthusiasts are considering the 10-bolt. HYTORC LoaDisc® & TS 801 Spray Track Order. pressure wax as supplied on high strength nuts) = .10, hot dip galvanized = .25, and plain non-plated bolts (as received) = .20. Randy Bolig has been working on cars and has been involved in the hobby ever since he bought his first car when he was only 14 years old. There is a difference, but you can’t see it unless you set both units on their side, and then measure the distance from that surface to the face where the ring gear attaches. 4 Unfortunately, unless you have the two units side by side, it is nearly impossible to tell them apart. 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. 60 ft-lbs. The below estimated torque calculations are only offered as a guide. 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