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GearSquad_2012.qxp 3/19/12 8:27 AM Page 2 $9.95 2017 GearSquad_2012.qxp 3/19/12 8:27 AM Page 3 S A Dedicated Team Of Drivetrain Experts TABLE OF CONTENT Gear Squad Advisors can: • Answer your Tech questions PAGE • Guide you with the proper selection of parts 1 • Determine which parts you need to complete your order • Recommend products and brands for your needs • Verify the accuracy of your order • Help with installation questions and guide you thru your install • Help with troubleshooting • Help with your application • Here to help by phone or e mail Find Us On Facebook GearSquad 877.757.9222 Wholesale customers 877.757.8444 Retail customers [email protected] GearSquad_2012.qxp 3/19/12 8:27 AM Page 4 TABLE OF CONTENTS TABLE Table Of Contents . .1-2 Ring & Pinion Tech . .3-4 Drivetrain Guide . .5 Axle Identification Chart . .6-8 Differential Tech . .8-9 Axle Tech . .10 AMC Model 20 . 11-12 Nissan H233B . .75 Chrysler 8 IFS . 13 Toyota 7.5 Standard . .76 Chrysler 8.25 & 8.375 . 14 -15 Toyota 7.5 Reverse . .77 Chrysler 9.25 Front. 16-17 Toyota 8 . 78-79 PAGE Chrysler 9.25 Rear . .18-19 Toyota 8 (29 spline) . 80 Chrysler 10.5 (American Axle) . 20 Toyota 8 LC . 81 2 Dana 28 IFS . 21 Toyota 8 IFS Clamshell . .82 Dana 30 Standard . 22-23 Toyota 8.2 . 83 Dana 30 Reverse . 24-25 Toyota 8.4 . .84 Dana 30 TJ (Short Pinion) . 26-27 Toyota 9 IFS . 85 Dana 30 JK . 28-29 Toyota 9.5 LC . 86 Dana 35 Rear . 30-31 Toyota 9.5 . 87 Dana 35 TTB / IFS . 32 Toyota 10.5 . 88 Dana 44 . 33-36 Suzuki Samurai . 89 Dana 44 Reverse . 37-38 Dana 44 JK . 39-40 G2 D44 Axle Assemblies . 90-93 Dana 50 . .41-42 G2 D60 Axle Assemblies . 94-95 Dana 60 . .43-45 Dana Spicer D44 Axle Assemblies . 96 Dana 60 Reverse . .46-47 Dana Spicer D60 Axle Assemblies . 97 Dana 61 . .48 G2 Axle Shafts (Front) . 98-99 Dana 70 . 49 G2 Axle Shafts (Rear) . 100-102 Dana 80 . 50 Ten Factory Axle Shafts (Front) . 103-105 Ford 7.5 . 51 Ten Factory Axle Shafts (Rear) . .106-107 Ford 8.8 . 52-53 Motive Gear Axle Shafts (Rear) . .108-109 Ford 8.8 IFS . 54 Wheel Bearings / Locking Hubs . 110 Ford 9 . 55-56 Pinion Yokes . 111 Ford 9.75 . 57 Transfer Case Kits . .112-114 Ford 10.25/10.5 . 58-59 Differential Covers . .114-116 GM 7.25 IFS . 60 GM 7.5 / 7.625 . .61-62 Quick Look Up . .117 GM 8 . 63 Jeep Speedo Gear Chart . .118 GM 8.25 IFS . .64 Tech Tips . .119-120 GM 8.5 / 8.6 . .65-66 Ring & Pinion Installation . .121-123 GM 9.25 IFS . 67 Glossary . .124-126 GM 12 Bolt 8.875 . 68 GM 12 Bolt 9.5 . 69 GM 12 Bolt 9.6 . 70 GM 14 Bolt 9.5. 71 GM 14 Bolt 10.5 . 72-73 GM 14 Bolt 11.5 (AAM) . 74 www.gearsquad.com www GearSquad_2012.qxp 3/19/12 8:27 AM Page 5 TECH RING & PINION TECH WHY DO I NEED TO REGEAR MY TRUCK • To gain power back from larger tires • Better towing for heavy loads PAGE • Increased mileage 3 • Less strain on motor and transmission • Enhanced off-road performance • Better driveability 5th Gear Tire Size Gear Ratio & Speed Engine RPM Pros/Cons Yields good fuel economy, 3.55 lacks in performance 29”Tire Lacks performance and 3.55 reduces fuel economy 35”Tire Returns power band to 4.56 factory settings 35”Tire Improves performance and 4.88 helps compensate for added rolling mass of large tires 35”Tire 877.757.9222 Wholesale customers 877.757.8444 Retail customers [email protected] GearSquad_2012.qxp 3/19/12 8:27 AM Page 6 TECH RING & PINION TECH If you have made any significant upgrades to your vehicle, you may want to consider taking a closer look at your drive train components. With increases in horsepower, torque & tire diameters, some of the factory components are not up to the task that they were originally designed for, and are at risk of failing. There are also performance gains that can be made that are often overlooked. For performance and fuel economy, the first items you need to consider are your ring & pinion gears. These are the gears that redirect the torque from the driveshaft to the axle shafts. They also provide gear reduction, giving you the opportunity to optimize your drive ratio to gain performance and improve gas mileage lost by oversized tires. By replacing you current ring & pinion(s) with the proper ratio to accommodate your tire size, you will be running your engine at the optimum RPM. This allows your engine and transmission to work together for maximum efficiency. Follow our Gear Ratio Guide to select the proper ratio for you driving needs. If you drive your vehicle in rough terrain and find you self needing more traction, you will need to consider upgrading your differential. From the factory most vehicles are equipped with open type differentials that work great for daily driving, but lack the needed traction on loose surfaces. There are many options as to upgrading to a traction devise such as a LSD (Limited Slip Differential) or a Locker. They all have their own benefits depending on the terrain and the type of driving you plan on doing. With either choice, you will be able to transfer more of power to the ground, rather than let your tires spin in on spot. You can look at our Differential Guide to decide what kind of traction device best suits your driving habits. PAGE If you have made the suggested upgrades and increased you power & traction, then you need to consider upgrading your axle shafts to handle the extra 4 load. The factory shafts were never designed to handle the extreme loads of high horsepower engines, oversized tires & aggressive traction devices. By upgrading to axles that were manufactured with better materials, and engineered to handle the added load, you prevent catastrophic failures that result from failed axle shafts. GEAR RATIO GUIDE FOR LARGER TIRES Gear Ratio Whenever you change tire size from the original size or 3.07 3.21 3.31 3.42 3.55 3.73 3.91 4.11 4.27 4.56 4.88 5.13 5.29 5.38 5.71 from one size to another, this will have a direct effect on power and drivability. The chart below will help you to 28 2395 2504 2582 2668 2769 2909 3050 3206 3331 3557 3806 4001 4126 4196 4454 select the optimum gear ratio to bring the power and 2312 2417 2493 2576 2674 2809 2945 3095 3216 3434 3675 3863 3984 4052 4300 torque back to where you want them. Using the chart, 29 first determine 30 2235 2337 2410 2490 2584 2715 2846 2992 3109 3320 3553 3735 3851 3917 4157 what your original gear ratio and tire size are then follow 2163 2261 2332 3614 3727 3790 4023 the lines to find your approximate RPM at 65 MPH. Next 31 2409 2501 2628 2755 2896 3008 3213 3438 find 32 2095 2191 2259 2334 2423 2546 2669 2805 2914 3112 3331 3501 3610 3672 3897 the new tire size on the left of the chart 33 2032 2124 2191 2263 2349 2469 2588 2720 2826 3018 3230 3395 3501 3561 3779 and look across to find the RPM closest to your original, the ratio listed at the top of that column will be your first 34 1972 2062 2126 2197 2280 2396 2512 2640 2743 2929 3135 3295 3398 3456 3668 choice for ratio. If you are interested in a change that will give more power or better mileage use the shaded 35 1916 2003 2065 2134 2215 2328 2440 2565 2664 2845 3045 3201 3301 3357 3563 coding as a guide. 36 1862 1947 2008 2075 2154 2263 2372 2493 2590 2766 2961 3112 3209 3264 3464 EXAMPLE : If your original RPM was in the left shaded area and you want more power and don’t mind some reduction in fuel economy then you may 37 1812 1895 1954 2019 2095 2202 2308 2426 2520 2692 2881 3028 3123 3176 3370 select any of the ratios listed in the right shaded area, that is available to fit 38 1764 1845 1902 1966 2040 2144 2247 2362 2454 2621 2805 2948 3040 3092 3282 your axles. THIS CHART IS DIVIDED INTO THREE CATEGORIES: 39 1719 1798 1854 1915 1988 2089 2190 2302 2391 2554 2733 2873 2962 3013 3198 1676 1753 1807 1867 1938 2037 2135 2244 2331 Tire Diameter Tire 40 2490 2664 2801 2888 2937 3118 Left Highway Driving, Good Fuel Economy. Center Daily Driver, Best Overall Performance. This chart is based on 65 MPH and a 1:1 gear ratio, on a manual transmission (4th gear). Please NOTE: if your vehicle is equipped with an Right Towing and Power, Poor Fuel Economy. automatic transmission the true RPM will be higher than shown on the chart, because some slippage will occur in the transmission and torque converter. With overdrive transmission, your RPM in overdrive will be 15-30% less than indicated, depending on vehicle. COMMON FORMULAS Tire Height Calculator Section Width X Aspect Ratio X 2 + Rim Diameter = Tire Diameter in Inches ( 25.4 ) Suggested Gear Ratio New Tire Dia. X Original Gear Ratio = New Gear Ratio Old Tire Diameter Speed Calculator (RPM) X Tire Diameter = MPH (Diff.