Not sure what to do here but I know I'm looking at a boat load of parts I do not have the money for right now so not sure what the hell I'm going to do. Known alternatively as the GM 8.875-inch (referring to its ring gear diameter), Chevrolet's 12-bolt rear end is one of the most celebrated in the American hot-rodding scene. Sometimes, pinion bearing preload can be a tricky procedure. Inside the 8.2-inch 10-bolt, the ring-gear bolts have 9/16-inch socket heads with 3/8-24 left-hand threads. The ideal amount of torque required on a pinion nut when installing an axle depends on many factors, but typically you should aim for 110-125 ft/lbs of torque unless otherwise specified by step #6 during the installation process. This axle was found in various vehicles from Chevrolets and Pontiacs to Oldsmobiles and Buicks with some of these models continuing production well into the early 80's. Speedway also offers the . Final torque on the pinion nut is necessary to compress the crush sleeve. This article is a compilation of information and and specs relating to the venerable GM Corporate 14 Bolt full-floating rear axle - also referred to as the 10.5" (after the size of the ring gear in inches) or just simply the "14b" for short. Sometimes strength is an important factor when choosing between components, and this is true with the 10-bolt and 12-bolt rearends. It is internally different from the 8.2 Chevy, but has the same external bosses and brackets. Additionally, this nut features a thread pitch of 11/16 x 20 which allows for easy removal during maintenance periods or when replacing bearings or other components within your axle assembly. Vendor Part Number. It's not easy, but pushing yourself can be rewarding; after all, with hard work come great rewards! By reducing the amount of free play between components, preloaded bearings can provide greater accuracy and quieter operation than standard ball bearings with clearances. The Fora platform includes forum software by XenForo. You can replace the pinion seal without changing the crush sleeve. It is essential to ensure that the pinion flange is firmly held in place with a fixture or tool. You have to do it a little differently though. I agree that the preload needs to be about 30 inch pounds. Typically, 10-bolt differentials are specific to a series of gears. This is especially true when it comes to cycling. 14 TO 19. **Note the Pinion nut is in INCH pounds Ring Gear Bolts = 55 lb. 8 & 9 BOLTS Locknut Size Threads per inch Steel Hex Locknut Steel Hex Flange Nut Grade C FNL Grade 9 Grade F Grade G Clamp Load (lbs.) The side bearing preload is the difference of preloads (5) x the gear ratio (3.73) = 18.65. What is the gear ratio on a 10 bolt rear end? Original gear ratios in pickups can range from 2.41:1 all the way up to 4.10:1, offering a wide variety of options depending on your needs and preferences. If the nut is loose then the crush sleeve must be changed. Crankshaft Pulley to Crankshaft bolt 77. I got the price for the seal, and it is near $9. If you find a rearend that uses a large spring perch like this, it is from either an X or F-Body. . PINION PRELOAD NEW INCH LBS. A full range of pinion gears is offered for the Chevy 10- and 12-bolt axle assemblies so you are able to select the correct gear set for your vehicle, application, and setup. extended cab crew cab p 14 8 6 gm rear axle specifications 10 bolt cont, what are the torque specs on silverado rear diff cover you need rear axle pinion nut torque specs for a 98 chevy 12 ton pickup 2wd the nut is generally torqued to 260 300 ft lbs or 25 inch, proper torque specs for 2002 chevy silverado 1500 44 hub assembly to steering . for a ten bolt rear it should be about 20 inch pounds while you are turning the torque wrench. BOP stands for Buick/Oldsmobile/Pontiac. If your mom is lunch, then yes, I've eaten lunch twice today. He is resurrecting a G-Body Chevy Monte Carlo and decided to reuse the original 3.73 gears and a factory GM posi unit. Pin. How do you fix a loose pinion bearing preload? 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. The unique design and shape make installation easier while providing ample strength for off-road applications. The 12-bolt is generally considered to be the stronger of the two rear axles. There are several differentials for the 10-bolt rearend. The first is to use a crush collar; this involves applying pressure between the yoke and cup until it reaches the desired depth. Bear Preload IN. So, in order to adjust the pinion bearing pre-load, shims of varying thicknesses are inserted into pre-load retainers. 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. Order our high performance synthetic oil and friction additive combo kit at time of order for ring and pinion or bearing overhaul kit and pay only $49.95 plus S&H, a $54.00 value. It's essential that you use enough force while tightening down the pinion nut so that your component will stay securely attached; however, it's equally important not to over-torque the part, which could cause permanent damage or deformation. GM: .035. Therefore, when building a performance car or truck that will be subjected to higher than normal stresses and torque loads, such as those produced by high horse power engines or increased traction created by sticky drag racing tires, it may be beneficial to choose a 12-bolt instead of a 10-bolt axle assembly in order to ensure maximum strength and reliability. If it takes a 5/16-inch wrench to remove it, its an 8.5. This versatility makes it a great choice for those who want to take their car from the street to the track without worrying about its durability. Its strength and durability make it an ideal choice for those who want to take their car out for some fun on the track without having to worry about its performance or reliability. For 30 spline pinion axles, PYN10 offers a 10-bolt 8.5" pinion nut that is designed to provide secure and reliable performance in the toughest of conditions. That way, you dont unknowingly spend money on something you really do not want. Preload plays an important role in many machine designs for its ability to reduce wear and tear on critical components while improving efficiency and accuracy. Usually, when people are discussing gear ratios, theyre referring to the relationship between a pinion gear and a spur gear. The rear end is full of it. GM 14 Bolt Specs (all data for SRW truck 14 Bolt axle - others may vary - see table on "different 14 bolts" below) . At West Coast Differentials we are committed to making your experience with us totally enjoyable. Just out of curiosity,what are the 8.5 (r 65lbft & c 60lbft ?) New bearings 19 to 22 inch pounds. We were lucky and had a desirable contact pattern on both the drive and coast sides of the gear teeth. Many times when you are rebuilding an existing rear end you want to save the original pinion bearing shim and re use it under the new bearing. When combined with a low curb weight, this combination creates acceleration so fast it feels almost supernatural. Backlash arises when two gear teeth mesh together in order to transmit power from one shaft to another; the teeth need some play to avoid jamming and ensure smooth operation. Choosing a higher ratio will provide more power and torque for pulling heavier loads or navigating steep grades with ease, while lower gears are better suited for those tackling long stretches of open highway or cruising around town at slower speeds. While adjusting preload can provide some relief from overly-stiff or soft springs, ultimately you should replace the springs themselves if they dont provide the desired level of performance. 3. remove yoke from splines. Products include ring and pinion sets, installation kits and axle shafts for GM, Ford, Chrysler, Jeep, and Toyota vehicles. Not only is this a wise financial decision for both parties involved, but it also shows how much Chevrolet values customer satisfaction and safety. Not only was the 10-bolt assembly used in low performance applications, but it was also utilized in a variety of different vehicles ranging from Camaros, Chevelles and Impalas to even the earlier Chevy IIs. This will ensure that your backlash is correct without having to swap the shims. Is a GM 10 Bolt rear end good? Next, attach the pinion nut onto the end of the shaft and use a torque wrench to tighten it to between 110-125 ft/lbs of torque. Whats The Reason Enthusiasts Cant Get, Yes I Am A Dinosaur, And Why I Feel Electric Cars, Rare Rides: The 1969 Chevrolet Camaro COPO, SPEC Clutches: For That Next Engine Swap Or OEM Upgrade, Shop Tour: Brian Tooley Racing Expands To Be A One-Stop Shop, Moroso Anti-Roll Kit Is The Right Tool For The Dragstrip, Why You Need A Proper Fuel Tank Vent In Your Ride, Fenix Is A Next-Gen 69 Camaro With 1,180 Horsepower. On the other hand, if there is too much backlash then this will also lead to excessive mechanical wear due to increased friction and noise as the teeth continually rub against each other. Once you give everything a thorough inspection you can begin the re-assembly process. When working on the assembly of a differential, there are two methods for adjusting the pinion depth. :yipi: Thats it?? The PYN10 pinion nut has been specifically designed to fit 30 spline pinions and provide a secure fit and lasting performance. From there I make very minute changes, checking the pre load with the inch lb torque wrench several times. Jul 2, 2020 / Are all GM 10 bolts the same? Mikz86TA. Too much won't hurt anything other than break the bolt. 1989 Toyota Pickup/3vze/R150F/Dual RF1A's/8.0 Detroit/8.0 Detroit/5" SAS/38 TSL'S. This allows you to put the pinion gear in, set the pinion bearing pre-load, set the backlash and then run a contact pattern without the chance of compressing the crush sleeve too much. 2/3 drop, HP Tuned, Built 60e, 4.10s, Yukon Duragrip, etc. With the exception of truck differentials with 30-spline axles, andthosecarrying 2.41 and 2.73 gears (series two), the differentials will support all gear ratios without having to change carriers. Max Ellery's Land Cruiser Repair Manual 1969-1990 (FJ & RJ) Take Zach R. for instance. Furthermore, its thread size of 1 7/16"-20 makes it compatible with nearly all GM style rear ends from 1955 to present day models. When changing a ring & pinion and doing final install of pinion there is no torque spec on the pinion nut itself. The 8.5-inch 10-bolt rearend was used in cars and trucks over a wide range of years. Pinion Nut Torque Spec. Originally, gear ratios ranged from 2.41 through 4.10. While deciding on the ideal gear ratio for your bike, it's important to consider that a lower value will provide more comfortable pedaling, as you'll be able to spin the pedals at a higher cadence. Part Number. It is robust enough to withstand any punishment inflicted on it by racetrack use. does anyone know the torque specs for a 10 bolt 7.5 for the pinion and carrier caps . What is the torque specs on pinion nut? The Fora platform includes forum software by XenForo. 8-Inch Ford Rear End Torque Specifications. Pinion preload (used bearings): 8 - 10 in*lb. Our stock 10-bolt was plenty stout to withstand the torture of 165 hp from the ZedSled's stock 350 (yes, that was sarcasm), but we're looking down the barrel at 500 hp from our cammed-up 6.0 swap . If you are installing an axle and need to know the torque specs, it is important to first understand what torque is. It involves placing a collapsible spacer between the bearings of the pinion gear, then using a torque wrench to tighten the pinion nut until it reaches the correct amount of pressure or preload on the bearings. Sometimes, you need to push yourself. 12 Bolt Rear Axle Torque Specs. We think top-notch customer service is the most important thing we do. The reason why it's so hard to turn the pinion nut is because not only are you crushing the crush collar but you're also pressing the outer pinion bearing onto the pinion gear. The date and location of manufacture coding changed in 1971. Torque is a measure of rotational force that must be applied in order to secure components such as axles and other parts together. Its strength and reliability have been proven time again, making it an excellent option for drivers looking for reliable performance from their vehicle. If you're looking to get the most out of your pickup truck, you may want to consider changing the gear ratios. Lifted78Chevy. I have a 2001 2500 HD. The specified preload needs to be obtained by carefully crushing the spacer with just enough force from turning the pinion nut in order for it not to be too loose or too tight, as either one can cause serious damage if done incorrectly. Not only has the 10-bolt rearend proved its worth in high-performance, high-horsepower applications, but it has also been found to be a great unit for street/strip cars. Pinion nut has no torque spec. It was used in different models by all GM divisions with the exception of Cadillac. Yukon Gear & Axle SK CSGM8.5 Yukon Gear & Axle Crush Sleeve Eliminator Kits | Summit Racing. The 10-bolt GM rear end has been used in many different applications since its introduction in 1968 and continues to be highly regarded as one of the toughest axles available today due to its proven durability and versatility over decades of use in a variety of situations requiring extreme performance requirements from street racing too off roading adventures. To do this, measure 10 thousandths of an inch on the shim and shift it accordingly. Finding a 12-bolt that is affordable, is getting to be anearly impossible endeavor. The purpose of preloading a bearing is to eliminate any existing clearance that has been designed into standard ball bearings by utilizing tension or compression loads applied directly onto each component within the assembly. The 8.5-inch 10-bolt rearend is hugely popular because aftermarket carriers and gears are easily interchangeable. The pinion nut should then be secured and tightened until there is no bearing play at all. We will safeguard your e-mail and only send content you request. Replace original worn or damaged nuts each time a gear set is changed. The axle shafts are also held in place by four-bolt retainer plates at the outer bearing, not C-clips. sny 00235 converted We pressed the new bearings onto the carrier and the front pinion bearing and went ahead and put the assembly together into the housing. It was in the 30-35 I "think" from GM. With its strong construction and durable material, the PYN10 10-bolt 8.5" pinion nut makes for an excellent choice for those looking for reliable performance in even the most extreme environments. By Albert. It is important to have the right pinion nut for your 8.5-inch 10-bolt rearend. The distance between thebottom center bolt in the cover and its adjacent bolts is 3 1/4 inches. grade 8. You will also notice the large, flat, cast-in protrusions at thefive andseven oclock positions. You can simulate pinion bearing preload by tightening the pinion nut until the proper amount of drag is felt with only motor oil on the pinion . We have your differential parts in stock ready to ship today. It doesn't have to be hard, and we offer some tips to keep your car's finish in top shape. This ensures all parts remain tightly fitted together without any space between them, resulting in increased stiffness as well as reduced friction within the system as a whole. Not only will you be getting the best quality performance with JEGS Pinion Nut, but you'll also have the convenience of knowing it's made to fit GM 8.875 inch 12-bolt car and truck axles. 7/16" x all lengths 60-65 ft lb. The 8.5-inch pinion diameter is 1.625 inches, whereas the 8.2-inch is smaller at 1.435 inches. Call 800.979.0122, 7am-10pm, everyday. The 8.5-inch 10-bolt also shares the same pinion shaft diameter as the more expensive 12-bolt. FORD: .020. 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. Thats usually proven when used in high-performance, high-horsepower applications. Chrysler 300 and Dodge Charger 2006-2008 Torque Specifications Repair Guide. Ring Gear Backlash Ring Gear Bolts to Cast FT. LBS. Well show you what to look for in this buyers guide. . The 8-inch Ford rear axle was used from the early 1960s to 1980 in small and mid-size passenger cars with six- and small-block V-8 engines. Now that we know our pinion depth shim is correct we can do the final assembly. Like most 10-bolts, the axles are held in place by C-clips on the inner end of the axles. Currie 44 : Torque: Pinion Nut (Solid Spacer) 250 ft lbs. Come join the discussion about Silverados, Sierras, and other full size trucks performance, modifications, suspension, lift kits, tires, maintenance, and more! 6 TO 10. Carrier Cap Bolts. Race-spec ring and pinion gears for desert racing, rock bouncing, and rock . I reused the old crush sleeve and just added a thin shim out of the set to be able to get the pinion preload using the old crush sleeve. tighten the nut down till its snug and put on your torque wrench and turn it about 3 revolutions. 7.25 12-14: 6-7: 6-10: 55: 50: 8 IFS: 12-15: 6-8: 6-10: 55: 60: 8.25 12-15: 6-8: 6-10: 55: 60: 8.75 - 41 Case: 13-15: 6-8: 6-10: 55: 90: 8.75 - 42 Case: 15-25: 7 . I have a 1993 Suburban K1500. These are incredibly robust pieces of machinery that can handle a surprising amount of power, as long as you use the right axle for your application. lbs.) Unfortunately, you cannot rely on this torque because the crush sleeve provides unpredictable and non-linear resistance as it buckles and crushes. Backlash refers to the distance between two mating gear teeth when they are not engaged. 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.