Eaton ho72 gear ratios. Need assistance? Call 877-776-4600. The common ratio for these is a 456 and 513 and some 410's. 57 gear ratio. I know they have 3. 5 10bolt or 8. Eaton HO72 in good shape with 4. 14's and lockers. Apr 15, 2023 · Ho33 HO35 HO52 HO72 Eaton ot Chevrolet axles ? The 1960 - 1966 Chevrolet & GMC Pickups Message Board Sep 27, 2009 · are all the ho72 pinions that big? cus that looks way fucking bigger than what iive got i havent torn into it yet though so idk. 4. Apr 26, 2008 · The C20 rear axle is the HO72 (Big Pumpkin), like the front it has bigger bearings, shafts, tubes and gears over the little 8. What do I need to know about swapping to later gears? Should all this just be a bolt-in job or am I missing anything? Eaton HO52/HO72 ring gear:10 1/8" pinion shaft diameter: 2" ratios:4. Eaton differentials are known for being bulletproof and indestructible. 31 ratio axle under it if you can find one. Pinion Gear # 3934841. Includes transmission gear ratio, weights, length & PTO speed. 10 ring gear from a Dana 80 sitting there, so I stacked them and got a quick shot. 5 tires (about equivilent to a rated 31" tire). eMobility, Gear Ratios, Transmission Specifications CatalogPlease check this Transmission Specifications Catalog that contains product specifications including gear ratios for current and discontinued Eaton and Eaton Cummins manual and automated manual transmissions. For Chevy, GMC 3/4 And 1 Ton Trucks Rear Axle. Loosely reassembled as you can see so easily Description Condition: Used Eaton H052 4. 14 ratio) or are you going to make them the weaker 8x41 (typical Dana-esque 5. com/vboard/showthread. New Old Stock (NOS) for dependable performance in classic drivetrains. Jason. 10 Ratio. 57 ratio. Came off of a running Chevy 3/4 ton truck. 90:1 (wich would be great) early version wich apparently 21060 S/D/A 21065 S/D/T/P, 21121, 21221, 21321 21080 S 22060 S 22065 T 220 S4/P4, 22065 S/D/T/P, 22080 S 22121, 22221, 22321 23070 S/D 23070 T/P 23080 S 23080 T 23085 S/D 23070S, 23085 T/P Jul 17, 2017 · HO72 -- Eaton axles used in 1-ton trucks from 1947-1972 The center carrier interchanges between both axles but NOT with other manufacturer's axles (Spicer, Dana, etc). Apr 10, 2016 · Page 5- Eaton HO72/HO52 vs. I'd like to know more about the 14 bolt Detroit and axle swap if anybody knows. I have been told they were used in 67-72 Eaton rears on Chevy trucks with B Mar 19, 2006 · 5. Feb 2, 2017 · Eaton HO72 rear axle The 1967 - 1972 Chevrolet & GMC Pickups Message Board Apr 8, 2010 · That should be the Eaton HO52/HO72. The HO52 and HO72 bolts are both in use on Ford vehicles. Has 10 bolt cover. Please help Apr 1, 2021 · Doe it also have a drop-out diff head on the other side? If so , It could be an Eaton HO52 or Eaton HO72 Sep 11, 2018 · 63' Chevy C30 Dually Rear End Identification The 1960 - 1966 Chevrolet & GMC Pickups Message Board Oct 11, 2008 · Ho72 gears Hey, hey, all this talk about HO72 ring and pinion sets is neat! One MAJOR question, though. It was originally developed by Eaton in the 1930s and has been used in various cars ever since. Feb 28, 2016 · Eaton HO52 Gear Set The 1967 - 1972 Chevrolet & GMC Pickups Message Board Eaton HO52 / HO72 Ring Gear Comparison. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Jun 6, 2022 · Does Ford have Positraction? The answer is yes. 10, 4. 50R16. 3. Anybody know the difference that causes the reduction in GVW by 2k#? Is it just a 4 pinion vs. I have been told they were used in 67-72 Eaton rears on Chevy trucks with B Shop 3785597 gear set for GM Eaton H052/HO52 axles, 4. 14 Gear Ratio at the best online prices at eBay! Free shipping for many products! Can anyone confirm that there were 3:73 available for the Eaton HO72 rear. Going by the service manual for a Transmission ratio specs for Eaton Fuller 9 speed transmissions. It’d be nice if Eaton would continue to make the no slip w the right spline option tho, they still make them for the 14 bolt. Especially a higher ratio like your wanting. -WMS is 63 or 65in and determined by the hub Can anyone confirm that there were 3:73 available for the Eaton HO72 rear. 14 (i think there are a few more) axle splineage:17spl Gear ratio specifications for Eaton Fuller 8 speed transmission with transmission gear ratios, weights, length & PTO speed. 75 12 bolt in the 1/2ton. -My guess is they were in use form 1947 until ? in GMs 2 ton trucks. Jul 28, 2021 · With the factory gears already being good choices for off-road, I don’t even see the need for much aftermarket support. com/vboard/forumdisplay. Wear Pattern As Shown In Pictures Rolls Through Smooth Internal Kit Is Sloppy And Will Need To Be Gone Through Bearings Are Used And Are Not Guaranteed 9 Tooth Pinion Gear 37 Tooth Ring gear The Drop Out Pictured Is The Drop Out You Will Receive Upon Purchase. Dropout is good used takeout. 2-55. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Feb 20, 2009 · Do I see 7-36 on those gears Good find eather way with the low milage axle and 3rd section. 1947. I've spent hours looking researching rear end. 1 One Ton Rear End Upgrade - New Tech Tip Forums Active Threads Jan 10, 2016 · HO110 has been found All 4x4 Tech & Off Roading I consolidated information regarding the conversion of the 1947/55 3600 & 3800 rear ends. Comes with parking brake This document contains product specifications for current and discontinued Eaton and Eaton Cummins manual and automated manual transmissions. Positraction is a type of differential gear that allows the wheels to turn at different speeds when turning corners. Eaton HO72? The 1967 - 1972 Chevrolet & GMC Pickups Message Board Mar 13, 2015 · Help with rear end identification. 10,4. Eaton HO72? The 1967 - 1972 Chevrolet & GMC Pickups Message Board Nov 19, 2013 · Rear Axle Ratio Charts For 1967 - 1972 GM Trucks The 1967 - 1972 Chevrolet & GMC Pickups Message Board Mar 31, 2025 · Who's Online Now 10 members (Herman, NorthCoast3800, Peggy M, Guitplayer, 1956_GMC_630, DennisM, BC59, jtaoj0, JW51, 1 invisible), 124 guests, and 0 robots. Feb 18, 2021 · Eaton HO swap The 1967 - 1972 Chevrolet & GMC Pickups Message Board Eaton Performance Super Finish series of ring & pinions. 10 or 3. php?f=6) - - (https://67-72chevytrucks. Complete from drum to drum. This page contains important data such as ratios, torque ratings, dimensions, and PTO speed for current and out of production Eaton transmissions. Are the gear blanks different?Also commentary on rusty ring gear teeth. 10 gear ratio. Supposedly the brake shoes are different sizes between the two Find many great new & used options and get the best deals for Eaton Ho72 Carrier Assembly 3rd Member 7/36 Teeth 5. 31 ratio started in 1969 and carried over from the old eaton HO52 and HO72 axles to the 14 bolts in 73. 14 gear ratio. 2 pinion carrier? Or is that it at all? Oct 27, 2012 · Thanks Jason! :thumbsup: A friend of mine says there were a few different variables over the years as far as the gear sets and center sections go, and he was suggesting that instead of piecing an HO72 together out of parts from multiple sources that it's better to get a 3rd member that already has the gear ratio that I want. Wouldn’t take much to Jul 1, 2011 · I scored a 1969 4:10 NOS gear set, got a later pinion bearing retainer, NOS front and rear pinion bearings. Durability. In stock. Call 877-776-4600 for assistance May 14, 2008 · Eaton HO72 with 14 bolt carrier? The 1967 - 1972 Chevrolet & GMC Pickups Message Board. Note the wear pattern and pitting as pictured. Upgrading the 1951 GMC 3/4 ton truck’s Eaton H072 457 ring and pinion to a 3. 41 Tooth Ring gear. Took apart to clean up. 55 or 3. Judging by most forums and their last responses, I might be about 10 years late to the party I originally wanted to swap the gears with a 4. 13 gears. 14 gears. Differential manuals free to view or download, including parts manuals, service manuals and owner's manuals. It has 5. 73 ratio requires precise gear tooth pattern setup. (41 ring gear teeth, 10 Pinion gear teeth). It is out of a 1972 C20. Feb 9, 2014 · Hi guys, a buddy of mine is having hard times finding a "faster" ratio for his truck, axle is an old Eaton HO72 . Round back cover with a drop out third member correct? Gear sets for these are getting hard to come by. 10 Ratio Rear Axle Ring And Pinion. Our lineup includes locking and limited-slip, automatically engaging and driver-selectable products. 56 is the most common by far with a few lower ratios around. 5 in ring gear -10 lug hubs Lets try to gather as much info as possible and From 1948 Chevy 3600 pickup. This results in an industry-leading level of smoothness and consistency, reduced friction, wear, noise, Apr 14, 2020 · Eaton rear end up for sale. Quick shipping. You might have Eaton Performance Ring & Pinion Eaton Performance ring & pinion gear sets are available in a wide range of axle ratios for many applications: I consolidated information regarding the conversion of the 1947/55 3600 & 3800 rear ends. Here Mar 10, 2013 · Eaton HO72/HO52 vs. Produced 1947 thru 1972. WRONG. Detroit No Spin Locker. Seemed low geared to me, of course it has 9. Feb 20, 2014 · Gear Ratio The 1967 - 1972 Chevy/GMC Suburbans & Panels Message Board Apr 20, 2019 · Eaton ho72 The 1960 - 1966 Chevrolet & GMC Pickups Message Board Apr 20, 2019 · Eaton ho72 The 1960 - 1966 Chevrolet & GMC Pickups Message Board Finally identified the rear axle in my '71 C-20. ring and pinion ratio is now 4. com. Eaton HO52 / HO72 Differential Carrier Comparison. Loosely reassembled as you can see so easily Work in progress, what questions and ideas do you have, what is missing? Purpose of this thread is to explain how to perform a 14 bolt rear axle swap, Aug 27, 2007 · Got my 4. 14, and apparently a 5. 90,4. The time now is . Are they going to be 7x36 (original 5. Choosing an Eaton Performance differential not only ensures ultimate performance, our superior product quality reduces time spent in the garage and decreases - (https://67-72chevytrucks. 10 Eaton HO72 ripped apart today and got the gears ready to ship off to AlxJ64. 14s a few spare third sections (052s and 072s). . i have a eaton 3rd member ho72 8 lug rear axle and im wondering what i can do as far as Oct 31, 2018 · Get the best deals for Eaton Ho72 at eBay. From 1948 Chevy 3600 pickup. Going by the service manual for a Jan 13, 2012 · hi my name is jake and i own a 1972 chevy k20 long bed 3/4 ton 4x4. Original OEM Used Part. Eaton offers a broad portfolio of differentials to meet the unique needs of performance and enthusiast drivers. Going by the service manual for a I replaced the pinion seal on the HO72 third member I bought that has the 4. 56 and 5. Eaton Rear End Gear Ratios The 1967 - 1972 Chevrolet & GMC Pickups Message Board Jul 15, 2005 · Eaton/GM HO52 or HO72 is what is pictured. Feb 23, 2004 · Eaton rear axle The 1967 - 1972 Chevrolet & GMC Pickups Message Board Feb 18, 2019 · All times are GMT -4. Super Finish gears have an additional/final surface finishing process that is applied to the gear set after all m chining and heat-treating operations have been completed. 56:1, doing a research on the web we found a 4. 10 Vs. -12. They are full float, 10. However a modern 14 bolt Detroit will fit in the Jan 3, 2010 · The big brother of the Eaton H052/72 that some of us have been running seems to be wellbigger. This information will help you change the gear ratio to 4:10 Oct 29, 2006 · For example, the only OEM gear ratios made for the Eaton were 4. 57, 5. At one time Precision gear was doing a 410 ratio but it seems like they might have stopped. Sep 22, 2025 · I replaced the pinion seal on the HO72 third member I bought that has the 4. Eaton H072 Dropout. Never tore one apart, but I really like it so far. 14 Bolt FF Engine & Drivetrain Gathered gear ratios in hi-range provide potential fuel savings by helping keep RPM’s low to remain in the engine’s optimum fuel efficiency band. 14 Bolt FF Engine & Drivetrain Eaton H072 H052 Ho52 Ho72 4. Includes transmission ratios, weights, length & PTO speed. Aug 3, 2020 · In my 1959 Chevy 3600, I have a HO52 rear differential with 4. These documents are unique to the Eaton Cummins website. 57 and 5. 125 ring, 17 spline axle. Mar 7, 2020 · Eaton HO72/HO52 vs. 14 Bolt FF Engine & Drivetrain Aug 9, 2007 · I think Randy's R&P has new gear sets. 14 Bolt FF Engine & Drivetrain Can anyone confirm that there were 3:73 available for the Eaton HO72 rear. 5. I replaced the pinion seal on the HO72 third member I bought that has the 4. 5) -Yoke is 1350 -I havent weighed an Eaton HO72 but they are much easier and lighter to move around compared to a 14 bolt. 13 ratio)???? If you look at all the serious drag racing gear sets, you will find that they have lower tooth counts (coarser cut) than is typical for generic street gears Apr 19, 2008 · The ratios are mix matched between the HO52 and HO72 depending on the model of vehicle they were available in, and things really get confusing when GM started offering the rear Dana 60's in their trucks. 11 Ratio Rear Axle Differential Drop Out. 10: wich is fairly good but we also found a 3. May 19, 2020 · I’m just a spectator here, as I don’t have any ho72 hand-on experience. how is your eaton treating you? you runnin stock 17 spline stuff? I replaced the pinion seal on the HO72 third member I bought that has the 4. most one tons came with 4. 56 gears. HO52 Rear Axle for general use Engine & Drivetrain Explore a wide range of our Eaton Ho72 Gears selection. Includes transmission gear ratios, weights, length & PTO speed. Dec 26, 2012 · Anyone tangled with these old 3rd member beasts? They are found in 1947(ish) to 1972(ish) GM 3/4 and 1 tons. Eaton Fuller 10 speed transmissions specifications chart. There are a lot more choices for the 14 bolt, and you can actually buy all of them new, and on and on, ad nauseum. AXLE IDENTIFICATION denny graham how-to photo's This information should be helpful to those that are looking for the eatons. 14 was an optional gear ratio, alot of people on this board will like to tell you that all duallys came with 5. ? Close enough to make the 14b carrier to work, to open up on locker options, including arb? Apr 2, 2006 · again eaton ho72 0r ho52? Engine & Drivetrainagain eaton ho72 0r ho52? - The 1947 - Present Chevrolet & GMC Truck Message Board Network > > Feb 20, 2014 · Gear Ratio The 1967 - 1972 Chevy/GMC Suburbans & Panels Message Board I consolidated information regarding the conversion of the 1947/55 3600 & 3800 rear ends. Find the ratios for your fuller transmission. Call 877-776-4600 for assistance. Mar 31, 2010 · Does anybody know were i can get the gears for this rear end and are they any gear ratios for this. php?t=785383) jdl71 04-19-2019 06:08 PM Nov 14, 2001 · It's the Eaton ho72 I'm pretty sure, and it's coil sprung. 11, 4. Going by the service manual for a Oct 21, 2015 · Help Id rear differential Eaton HO52 or? The 1967 - 1972 Chevrolet & GMC Pickups Message Board Find out all the resources and documents related to service manuals, installation guides, and driver instructions. 57 was standard with the 250, 292, 283, and 307. Strength. 90 but it looks easier to go ahead and swap the entire axle. Here's the HO52/72 1951 GMC 3/4 Ton Truck Ring and Pinion Gear Upgrade Guide 3/4 ton trucks often face gear noise and premature wear after ring and pinion replacements. This information will help you change the gear ratio to 4:10 from the original lower gears. Also just happened to have a 4. Only thing I’d like to see are lockers but u can stuff a 14 bolt one in there so they prob figure what’s the point. Jul 28, 2021 · -Ring gear size is 10 1/8 (some conflicting info on this but its between 10 and 10. Going forward, I would like to swap it out with a 14 bolt or Eaton Shop now for Parts and Manuals specific to 1960-1966 GM H072 and H052 Full Floating Rear Axles. Jan 29, 2020 · Eaton HO72 gear swapping Jump to Latest 6. 83 (which is probably as rare as hens teeth). Are the carriers different? Also a tip on removing the carrier bearings. 57 should be one of the easiest original ratios to find. 14 gear ratios. Going by the service manual for a 1972 C20 truck the pinion nut torque spec is 220lbft but I had to go up to 230lbft in order for the cotter pin hole to line up with the nut. Faster, smoother range and splitter shifts and improved cold weather performance due to design improvements. Transmission ratios and specifications This page contains important data such as ratios, torque ratings, dimensions, and PTO speed for current and out of production Eaton transmissions. 11's as that was the standard ratio with the 327, 350 and 396/402. Jan 23, 2005 · HO 52/ HO 72 question The 1967 - 1972 Chevrolet & GMC Pickups Message Board Jun 30, 2021 · C20 rear axle options? The 1967 - 1972 Chevrolet & GMC Pickups Message Board I consolidated information regarding the conversion of the 1947/55 3600 & 3800 rear ends. It's an Eaton, either an HO52 or HO72. I've got a '72 Suburaban with what is probably the HO 52. 90's. Eaton Fuller 18 speed transmissions ratios. This is an non posi differential. I have been told they were used in 67-72 Eaton rears on Chevy trucks with B Mar 13, 2015 · Help with rear end identification. The 410 ratio is really hard to come by. How similar are 14b and ho72 carriers? Deck height, snout bearing diameters, ring gear pilot diameter, etc. Shop now for fast shipping and easy returns! Apr 19, 2006 · The gear set in my HO72 was a 4. Find top brands, exclusive offers, and unbeatable prices on eBay. 10Tooth Pinion Gear. Search. 21060 S/D/A 21065 S/D/T/P, 21121, 21221, 21321 21080 S 22060 S 22065 T 220 S4/P4, 22065 S/D/T/P, 22080 S 22121, 22221, 22321 23070 S/D 23070 T/P 23080 S 23080 T 23085 S/D 23070S, 23085 T/P Jul 17, 2017 · HO72 -- Eaton axles used in 1-ton trucks from 1947-1972 The center carrier interchanges between both axles but NOT with other manufacturer's axles (Spicer, Dana, etc). Get the best deals for Eaton Ho52 at eBay. Simplified shifting with preselect on all button shifts. Oct 19, 2013 · Page 2- Eaton HO72/HO52 vs. 56 open, however through some heavy junkyard running out here on the east coast, I accumulated a few sets of 5. Commonly came with stock Detroit style lockers and 3. But not much info seems to be out there. 10 is the highest ratio you will find for those axles, but 4. this is in a 1970 chevy C20 Truck. -Ground clearance is better when comparing unshaved 14 bolts to unshaved Eatons. 9K views 5 replies 5 participants last post by no camaro leftbehind May 28, 2024 R May 22, 2009 · if yours has a leaf spring rear suspension (G70 on the RPo sticker in the glovebox) then you could fit a 3. uu6 jjt8i kwuzn u6fjg x27foe szpjct2 ltphjk0j fnf9r k4nf ubsxi