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. Ring and Pinion Ratio Variations - An explanation of why some ring and pinion gear ratios vary. Peter - I'm retired but work part time as a pain in the ass. With its superior strength and durability, you can count on your PYN10 pinion nut to remain securely in place for years of reliable service. Once the specified preload has been obtained, make sure the bearings are seated by rotating the pinion several times. Differential Torque Values | In4x4mation Center - Morris4x4Center Step 1: To seat, torque nut to 50 (lb-ft) while spinning hub. If youre looking for a good.economical 10-bolt rearend to rebuild or install into your hot rod, you will need to be able to accurately identify thedifferent units so you dont accidentally come home with a 7.5 or 8.2-inch differential. So, when adjusting preload, if it is too loose then the shims should be removed. West Coast Differentials has been distributing quality differential and axle parts since 1982. Save Share. minimum is 181 ft-lbs., maximum 325 ft-lbs., keep cranking till you get within the range of 7.8-11.3 in-lbs of preload torque on the pinion. The most current parts and application information can always be found here on our website or by calling one of our differential parts experts. Sometimes strength is an important factor when choosing between components, and this is true with the 10-bolt and 12-bolt rearends. Dana 60 Gear Installation - Strange Engineering An important step I like to take is to assemble the pinion and differential case without the crush sleeve or the new pinion nut. GM 8.875" 12 Bolt Differential Ring Gear and Pinion Set. 1. Alternate Description. It was used in different models by all GM divisions with the exception of Cadillac. Mgrotel, nice cliff notes. Dana Technical Service Specs. Products include ring and pinion sets, installation kits and axle shafts for GM, Ford, Chrysler, Jeep, and Toyota vehicles. torque specs 8.5 rear | NastyZ28.com The pinion nut should also measure 1 1/8 inches, if the OEM pinion nut is still in use. This is also likely to reduce run times due to lower temperatures as theres less load being put on your vehicles engine when compared to running with a bigger pinion and smaller spur gear combination. As the speedometer rises, each gear shift is accompanied by an even more intense sensation of power, making every drive exhilarating and unforgettable. Yukon Gear's Pinion Nut makes any job more efficient by ensuring your parts remain secure while providing superior protection from contaminants. Sometimes, pinion bearing preload can be a tricky procedure. 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.) 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 . From there I make very minute changes, checking the pre load with the inch lb torque wrench several times. Recheck the torque to turn the pinion until it gets to the point where the amount of torque it takes to turn the pinion is between 15-25 in. If too tight, the bearings become overstressed and will fail prematurely, causing a catastrophic failure of both the ring and pinion gears. By Albert. Back off left-side adjusting nut approximately 2 slots. 2 ways. Ring gear bolts 65 foot pounds, bearing cap bolts 60 foot pounds. High-Performance Differentials, Axles & Drivelines, How to Measure and ID Differetial Housings, Filling Trim Holes in Car Body: Sheet Metal Welding Tips, Q&A With Our Race Experts: Tuning and Maintenance Tips, Small Block and Big Block Chevy Engine Flexplate Guide, How to Adapt LS Engine to 700R4 or Turbo 350 Transmissions, Chevy C10 Driveshaft Length Measuring Guide, GM Steering Column Compatibility, Interchange & Repair Guide. Ultimately, both engine power and torque play important roles in determining a cars performance capability as well as its overall efficiency. 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. IMPORTANT: The pinion preload should be at or below 4 Nm (35 inch lbs.) Here is my related question at almost 1 a.m. and torn down in driveway need to get to work: There was quite a chance that you have crushed the sleeve beyond the preload spec to make it hard to turn. This sleeve must be replaced every time the pinion nut is torqued. I have been taking it to ~250-300 ft lbs. Check the pinion preload by rotating the pinion with a torque wrench. 14 bolt pinion preload crush sleeve eliminator install help? It's got a 350 with a 10-bolt rear end. lbs. It's not easy, but pushing yourself can be rewarding; after all, with hard work come great rewards! Continue tightening the pinion nut to collapse the spacer and preload the bearings. Tips For Rebuilding A GM 8.5" 10-Bolt Rear Differential This is an 8.2 BOP axle. Im gonna go buy a good manual for shit like this. Come join the discussion about performance, lift kits, wheels, tires, modifications, troubleshooting, maintenance, and more! Differential cap bolt torque: 90 ft*lb. If you're looking to get the most out of your pickup truck, you may want to consider changing the gear ratios. If you locate a rearend that has coil spring perches, it could be from a G, A, B-body, or El Camino. Quaility Gears provide guaranteed performance. Allstar Pinion Nut GM 7.5 8.5 ALL72156. You can rest assured knowing that your axle is secured with this high quality product. 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 diagonalprotrusion at the top. A forum community dedicated to all General Motors truck owners and enthusiasts. CRAWLPEDIA Off-Road Encyclopedia. Would this be the same How to write up for my truck? Chevrolet C/K 1500 Questions - Pinion Seal - CarGurus There are several differentials for the 10-bolt rearend. If a bearing system is designed to have no clearance, then preloading is necessary. Products include ring and pinion sets, installation kits and axle shafts for GM, Ford, Chrysler, Jeep, and Toyota vehicles. Like all Chevy 10-bolts, the axles are retained by C-clips on the inner end of the axle shaft inside the carrier. ALL72156. This process must be done carefully, gradually increasing the tightness of the nut in increments until it reaches the desired torque level required to rotate the pinion correctly. Thick Gears and Carrier Breaks - Thick ring and pinion gears and differential carrier breaks explained. Differential Set-Up Specifications | West Coast Differentials CAP TORQUE. Whilethe 10-bolt rearendslineage can be identified by the code stamps, which are usually on the passengers side axle tube, there are literally hundreds ofpotential codes for the three different 10-bolt rearend housings. 8-Inch Ford Rear End Torque Specifications | It Still Runs 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. With proper maintenance, this rearend will hold up over time and ensure that your vehicle runs smoothly no matter what sort of conditions you put it in. 3/8" x all lengths 45-50 ft lb. This method works every time is done precisely as described. Constructed from high quality steel, the PYN10 features an integral washer design that ensures proper alignment of the bearing preload during installation and prevents damage to both the yoke and bearings. You have to do it a little differently though. It has a black oxide finish that ensures corrosion resistance while its construction of hardened steel ensures durability even under extreme conditions. Good luck finding one of these, however, as they are very popular among performance enthusiasts. GM 8.5" 10 bolt - Quick Performance The pinion on the left is part of a 4.11:1 gear set; the one on the right is a 3.08:1 pinion. 24-32 INCH pounds?? The inch pound rating is the force required to turn the pinion after the crush sleeve has been crushed. Used bearings 10 to 14 inch pounds. 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. How a GM 10-Bolt Differential Goes Bad. Use oil on the pinion nut washer surface during all assemblies . Pinion Nut 8.2 in GM 10-Bolt | Allstar Performance For that reason,many enthusiasts are considering the 10-bolt. It was first developed for racing cars where superior control on fast corners is essential for success; however, today torque vectoring differentials can be found in many production vehicles as well due to their exceptional performance benefits. BillaVista.com-14-Bolt Bible Tech Article by BillaVista 1/2" T-bolts - 50 ft lbs. Sierra Gear & Axle is a premium line of light-duty differential parts. I have a 1993 Suburban K1500. Jul 2, 2020 / The "feel" people are way more experienced that you or I so the top one is re-commended. While a carrier-bearing girdle is available for the 8.2-inch rearend and does give some support to the housing it doesnt provide a reliable and suitably strong solution. Are all GM 10 bolts the same? On the other hand, if the preload is set too loose it can cause a whining noise to originate from within the rear end as well as abnormal gear wear due to excessive movement between the two components - eventually leading to failure. . Once properly secured in place, you should have no further issues with your pinion nut installation. If you find a rearend that uses a large spring perch like this, it is from either an X or F-Body. 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. This tension is achieved through a collapsible spacer which is placed between the bearings and then compressed by turning the pinion gear nut. Once you get close to the right pinion preload, shim thickness adjustments need to be made in the .003 and down range to make adjustments, small increments make a big difference in pinion preload. On the other hand, reducing the size of the pinion or increasing the size of spur gear will result in decreased top speed but with an increase in acceleration. Some guys even go to the trouble of making a set-up bearing so you dont have to press on and remove the pinion bearing to try different shims. Ring Gear Diameter: 8.500Cover Bolts: 10Ring Gear Bolts: 10Ax . Over several generations of small block Chevy (and big block Chevy) engines there have been several changes that dictate what flexplate works with them. TORQUE SPECIFICATIONS-1994-2001 CHEVY S10 s & GMC When the preload of the pinion bearings is incorrectly adjusted, it can have serious consequences. Order before 4PM and most parts ship out the SAME DAY. Our LS swap adapter kits make it easy! FOR 1994-2001 CHEVY S10's & GMC SONOMA's. **ALL TORQUE SPECS ARE PER GM FACTORY & HAYNES MANUAL**. If you are installing an axle and need to know the torque specs, it is important to first understand what torque is. A higher engine power combined with more torque enables cars to accelerate faster while using less fuel - making it much more efficient and cost-effective in the long run. I used an 1/4" inch-lb torque wrench with two adapters and a 1 1/16" socket to check the preload. 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. #5. Come join the discussion about Silverados, Sierras, and other full size trucks performance, modifications, suspension, lift kits, tires, maintenance, and more! 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. Unfortunately, you cannot rely on this torque because the crush sleeve provides unpredictable and non-linear resistance as it buckles and crushes. You keep on tightening the pinion nut until you are within the in-lb. Rotate the pinion when tightening the nut to seat the bearings evenly. It is internally different from the 8.2 Chevy, but has the same external bosses and brackets. It is therefore important to strike a balance by carefully adjusting the backlash so that it meets manufacturer requirements for that particular differential system. So, in order to adjust the pinion bearing pre-load, shims of varying thicknesses are inserted into pre-load retainers. The pinion diameter is 1.438 inches, and has 25 splines. Nut secures driveshaft yoke to pinion gear. 440-500 lbs ft and I wouldn't tackle it bring it somewhere where they know what they are doing..I have a four foot torque wrench that goes to 500 but thats one hell of a grunt and you have to hold the flange while doing this. BOP stands for Buick/Oldsmobile/Pontiac. We will safeguard your e-mail and only send content you request. 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. I was able to pull the old crush sleeve from the pinion gear shaft without damaging it, so I just reused it and added a 0.51mm shim to it. One will want to torque the pinion nut to 190- 240 ft lbs (Small Diff's) D60 and larger 225 -350 Ft lbs with the proper preload achieved. Preloading a bearing eliminates the clearance, which increases stiffness and reduces friction. Sierra Gear & Axle parts are designed and engineered to the highest quality specifications for use in street, off-road and performance environments. grade 8. Pinion Nut FT. LBS. The carrier bearing rides in the races and you will snap the bolt off before you warp or crack the races. Rotating torque should be equal to the reading recorded during removal plus an additional 0.56 Nm (5 inch lbs.). Camshaft thrust Plate bolts 106 in-lbs. The 8.5-inch pinion diameter is 1.625 inches, whereas the 8.2-inch is smaller at 1.435 inches. It is essential to ensure that the pinion flange is firmly held in place with a fixture or tool. . The PYN10 is a 30 spline pinion nut designed for this purpose, and it is specifically made to be used with vehicles that have a 30 spline pinion in their 10-bolt 8.5" rear end assembly. The closer the teeth count is between the two gears, the higher the speed output will be; conversely, if there is a greater difference in tooth count, then more torque will be generated.