80w90 vs 75w140 gear oil Severe Gear 75W-140 40c vis 194. Is there really a big difference betewen 85W90 hypoid gear oil and straight 90W hypoid gear oil? I mean do these five points really make a big difference in Home. The state of the art of modern hypoid gear oils is the API service classification GL-5 covers most every hypoid gear lube you are likely to run across including synthetics (including "true synthetic" PAO base stocks as well as "semi Given such a proximity of the heat source would it be advisable to use 75w-140 grade gear oil, especially in the summer? Manual calls for 80w-90 in both differentials. Friction Modified Thumper Racing 4T Engine Oil & Thumper Gear Saver Transmission Oil. ; Oxidation inhibitors reduce the deteriorating effects of heat, increasing the oil’s service life. It’s also designed to Harley appears to be pushing their own brand of gear oil for the Harley transmissions and primary chaincases on the big twins. I have used Amsoil gear lubes for decades. Joined May 17, 2009 Messages 21,732 1999 - 2016 Super Duty - 75/140w VS 80/90w - Ok I know Ford specs out 75/140 synthetic rear axle fluid but a lot of gear companies recommend 80/90w as does a couple of local mechanics in fact one of them says he will never put in the 75/140 and only uses 80/90. They stuck . On my 18', Ford is calling for 75W-85 synthetic gear oil which is not only an odd weight but very expensive (especially from the dealer at $25 Anyone think I'd be better with 75w140? I went from M1 75w-90 in the 4Runner to ST syn 75w-140. This is supposed to make it be more Stabil in theory. Could be wrong, but that is the most consistent info I have gotten over the years. When run under real-world line-haul conditions, the use of 75W-90 can improve the efficiency of a Class 8 axle by an average of 0. E. I also need a replacement fluid for the Manual transmission: Any GL4 or GL5 80w90 or 75w90 gear oil. Shelf Life Statement; RoHS Statement; Hi, My Tacoma calls for 80W-90 or 90W in the differential. You can do the VI calculation on any oil from the manufacturers data sheet. A couple HP lost to the thicker gear oil. Discussion in '1st Gen Tundras (2000-2006)' started by tundrainsc, Jul 22, 2020. I was told to use 75W -90W to replace the oil which I did. com Came out to $108. 2015 - 2020 Ford F150 - Anyone using 75w140 in their rear diff? - the motorcraft 75w85 that the manual calls for just seems too thin and I am out of warranty. " SAVE TIME! RESERVE Online and Pickup your order In What are the Differences Between 75W-90 and 75W-140 Gear Oil? When comparing 75W-90 and 75W-140 gear oil, the main difference is in their operating temperature. Recommended for manual transmissions, manual steering boxes, transaxles, differentials, transfer cases and final drives. It uses the latest technology, purpose designed additives for long service life and meets the performance requirements of API GL-4 Plus as well as many other manufacturer specifications. Your right foot or a headwind will impact MPG far more than gear oil ever will. Only thing I would wonder with a 75W140 is whether the gear lubes have the same problem motor oils had with wide range viscosities. ; Rust and corrosion inhibitors protect internal components. Here are some of the most frequently asked questions concerning these two types of gear oils. Spec. 75w-90 Amsoil is about the best gear oil you can run. Interestingly, and as a side note, for Sport model manual specifies synthetic 75w-90, even though it's the same differential as far as I can find. Want some advice. A. I'm sure it would be fine other than a depends what you want for the best gear protection use the thickest oil that will still flow at lowest temp you live. ; Viscosity index improvers allow a lubricant to What about their synthetic gear oil? Specifically, the 75W-90 and 75W-140 Home. Does a gear oil have to be PAO or ester based to be good? No, there are mineral based gear oils that Extreme-pressure and anti-wear agents minimize component wear in boundary lubrication situations. Gear oil, a critical lubricant for the proper functioning of transmissions and differentials, comes in various viscosities Generally, 75W-90 gear oil is more affordable compared to 75W-140 gear oil. Weight depends on what type of conditions you torture the 'end with. In the past I have used Amsoil 80w-90 in the front differential and Amsoil 75w-140 in the rear. 8 did begin calling for 75W140, others didnt. 8. Would auto gear oil be a passable substitute for chainsaw bar lube? I believe most bar oils are rated 30 weight but I've heard that the engine and gear oil weight ratings are not directly comparable. 65, including shipping. This gear oil is recommended for conventional and limited slip differentials. Ford manuals, general information on the dana 60 front shows that 80W-90 is the Differences Between 75w90 Vs. i use the bmw synth 75W140 in the transmission and change once a year, regardless of miles. I have that in my 98 and 99 SUVs, and my Lincoln and 95 Crown Vic. temperature. Costco Mobil 1 5w-30 in all 7 of my vehicles. According to Royal Purple's data sheet, 75W/140 has a lower pour point than 75W/90 (-69F vs -60F). A. Next Last. 75W-140. I've chosen the next Severe Gear weight, the 75W-110 and it works great. 25 rear end. I use the mobile one regular gear oil also, not synthetic. Available Sizes Part Gear Oil: 75w90 or 80w140 You can certainly use 75W-140 in a non-M Variable Lock differential, but you cannot use 75W-90 in an M Variable Lock differential. Supertech 75w140 Gear Lube Petroleum 80W90 Red Line 75W90 ShockProof Gear Oil 1. Exclusively engineered for Harley-Davidson Motorcycles, this Heavy Synthetic Gear Oil is intended for use in extreme temperature environments (desert heat or cold weather), frequent two-up riding and heavy load riding applications. Hey Jeepers! Alright, having issues with the gear oil recommendations! I have a 2012 JKU Manual, D30 in front, D44 in rear. Everything from 75w90, 80w90 to 75w140. 66x10-8 1. 10 differentials I replaced my gear oil yesterday with 75w140 synthetic from the dealer, because they said the 75w140 supersedes it. If we look at 75w90 and 75w140, we discover that the main difference is the running temperature. 80w-90 difference, and also about The 80w90 spec is easy to achieve in almost any synthetic gear oil. If you do go to 75w-140 use nothing but synthetic and it does no harm. Jul 1, 2018 #18 Originally Posted By: rooflessVW Differentials operate in an oil bath. Grease - Temperature Limits Schaeffer Oil manufactures a number of synthetic gear oils and gear lubes to service a wide variety of applications. gear oils are typically 80W-90 or 85W-140. Joined Apr 17, 2006 SAE Gear Lube Grade; 46: 75W: 100: 80W-90: 220: 90: 460: 85W-140: 1500: 250: Equivalent Viscosity of ISO-VG Grades at 40 o C and AGMA Gear Lube Grades. Valvoline vs. Can you mix 75W-90 and 75W-140? Sticking with the same gear oil will allow your vehicle to be more efficient. The second number is a meadure of how it will thin at increasing temperature. Longer lasting 'end with the thicker gear oil. 90 grades are plenty thick for the MT and thicker would cause more shift effort. We hope you can now understand the difference. 75W-90, 80W-90, 85W-140. What is the best 75w140 synthetic gear oil? This is a tough question to answer. They have 75w-140, though. The 80w90 gear oil can be used in extreme pressure conditions and as a lubricant for non-synchronized manual transmissions in heavy duty trucks or buses. Differentials in viscosity level between gear oils can affect the performance of a vehicle. No LSD, only open diff Conversely, if you are looking to purchase 75W-140 gear oil, you can check out these brands: Valvoline; Lucas; Royal Purple; FAQs. Oil viscosity vs. com it lists two different types of gear oil for the diffs. I think the Yea, Ford says to use 80W-90 in both of my axles, but I use Valvoline Durablend 75W-90 (synthetic blend) in both with a little bit of friction modifier added to the rear diff (3. P. The viscosity of the See more Ford specifies 80w-90. My diff call for 80w-90 or straight 90. 75W140. Go. So, the MT continues either 75w90NS or MT90, and have some Ford GL4 75w90 for the next change. 85 total - Red Line Synthetic Oil 58304 - Red Line Synthetic Gear Oil - Overview - SummitRacing. There is speculation that some of the rear drive failures seen on the oilhead bikes and K bikes is due to using the 75W-140 oil in I can buy Royal purple in a 75w 140 non synthetic. MolaKule. SKU # 68917. 25 rear end with Traction In the realm of gear oils, the choice between 75W-80, 75W-85, 75W-90, and 75W-140 involves a careful consideration of your vehicle’s specifications, the driving conditions you encounter, and the type of transmission and differentials yeah a 80w90 will have high vis at 40C than a 75w which as you say is closer to what temp your car runs at. It has very fast flow at start up for slick gear shifts. 86. I just bought some Lucas 80W-90 (closest thing AdvanceAuto had), only to We have the best Gear Oil for the right price. (30/44a in my case). 80 total - Red Line Synthetic Oil 57914 - Red Line Synthetic Gear Oil - Overview - SummitRacing. This article is not intended to provide a complete recommendation of all possible performance gear oil, manufactured from a blend of synthetic base oils including ester. S Nope, Many Apps for the 8. Gear oil viscosity levels are specified in terms of weight-volumetric oil flow (WVOF), which is the measure of how much fluid can be pumped per minute through a restriction diametrical to the orifice plate. Mobil 1 also makes a 75W-140 synthetic gear oil which I'm sure is good stuff as well. About 600-Weight Gear Oil. The wider the range of VI improvers in motor oil, the more likelyhood of the polymers (VI Improvers) failing and sludging things up. I tried 75w-90 synthetic and really didn't like the low 'hum' that resulted. 07 Ranger 4x4 with rear limited slip (yes, I put friction modifier in), 8. 6 Navigating the Gear Oil Spectrum: Unveiling the Variances Among 75W-80, 75W-85, 75W-90, and 75W-140 Grades. The tractor actually calls for sae 90 in summer or sae80 straight mineral oil in winter. MB gear oil 75W90 GL5: GS Hypoid 80W90 GL5: HD 80W90 GL4/5: CARC: 80W90 GL4: Rotra 75W90 GL5: Hypoid gear oil 85/90 GL5: GS Hypoid 80W90 GL5: HD 80W90 GL4/5: Clutch: DOT 4: my wife worked for a long time at Motul as a chemist and a fabulous Motul 75w140 for gear box and Carc . according to the amsoil site the severe gear 75-110 oil "provides superior performance and replaces competitors’ 75W-110, 75W- 90 and 80W-90 gear oils. Gearbox oil; BMW SAE 75W 140 gear oil," (quoting various capacities from 700 to 900ml depending on Type 1 or Type 2 gearbox). SoNic67. 75W90 Vs. Full Synthetic gear oil. Just keep it changed on a regular basis. What Is the Difference Between 75W90 and 75W140? 75W140 gear oil is thicker than 75W90 oil, which means it can better withstand high temperatures and heavy loads. The very best companies in the auto industry take part in making gear oils. BTW - If you use a high quality synthetic (such as AMSOIL - Severe Gear® Synthetic Extreme Pressure (EP) Gear Lube 75W-90 (SVG) ), you most likely will never have to change it again (it's good for 100K miles easily)! Grades are just arbitrary numbers assigned to make it easy to select what oils you need. 95 each, $63. This actually made it Need some help with gear oil recommendations for my AWD EcoBoost Ford Flex. 75W-140 gear oil is a synthetic motor oil that is designed for use in high-performance applications. Royal Purple Max Gear 75W140 Gear Oil, 1 Quart. 78x10-9 1. This equates to thicker lubricant. Gear oil 80W-90 versus 75W-90. If you plan to tow often the 75w140 synthetic is supposed to be the best, but I tow often and use 75w90 with no worries. com Max-Gear is an ultra-tough automotive gear oil. Personally, I'm 75W 90 gear oil for both gearbox and final drive, and change It’s thicker when exposed to high heat and thinner under colder, wintry conditions than 80W-90. I have never heard until now that synthetic gear oil looses its viscosity at high temps. I've tried 75W-90 synthetic and like using it but the differential seems to have a slight 'whine'. It’s designed to maximize power and provide unsurpassed Oil & Lubrication - 75W-90 vs. Though the 75w90 gear oil is thinner, it offers Several oil brands stock 75w140 gear oil: you pick the best brand depending on price, quality, availability, and formulation. Not due for another change until 2017, at which point I will probably go with Quaker 75W-140 again. Joined Jun 6, 2015 Messages 491 Location VA, US. The factory fill rear differential fluid is a dino 80w-90 Motorcraft XY-80W90-QL conforming to the following specs: MIL-PRF-2105E, Mack GO-J, WSP-M2C197-A, GL-5 and MT-1 specs. 80W-90 multi-purpose gear lubricant meeting Mil. but got a little whiney when hot. Gear Oil 75W 90 or 75W 140. however, Dodge Dakotas can take 75w-140. My 2012 calls for 75w-90 front and 75w-140 for the rear. an S. 1; 2; Next. It maintains a more stable viscosity, thicker under high heat and thinner under cold conditions. However, both front and rear diffs have 75w-140 synthetic on the metal tags, so that is what I used last time. 80w90, what is the difference? These two gear lubricants share similarities, like their suitability for cold and warm weather. The main difference is their low-temperature stability. Where did you see that or who told you Royal Purple offered a non synthetic 75W-140 gear oil? RP MaxGear is a full synthetic synthetic gear oil. Just wondering witch one would be better. I use the Mobil 1 75w-140 for several of my toys, so I have a lot of it in my garage. I noticed that the guy with the E-150 in the thread I mentioned also had 3. If you plow tow race haul, use the 75w140. For example, the engine oil and gear oil grades overlap quite a bit even though engine oil tops out at 60 and gear oil starts at 80. Royal Purple 75W-140 Synthetic Gear Oil / Friction Modifier 1 Quart. 75w140 Gear Oil. ARCOgraphite. 75w90 vs. BUT for the 30 minutes you are warming up the 75w will have The DC service manual I have says it should be 75w140 (Genuine Mopar Fluid 4874469 SAE 75W-140 Synthetic Gear and Axle Lubricant) and other sources from other For the front should i use 80w-90 or 75-140? I have 80W-90 premium non-synthetic. Statements. Which gear oil should you use for your truck's differential? This video explains what the numbers mean, and which one is best for your climate and work load. Doing some research, looks like Ford switched over in 2015 to the 75w-85 for the rear, but kept the 80w-90 for the front. Use Front - 80w/90 - 3 qt - $14. Customize $ 24 99. 80W-90), spending a lot of time in the Colorado mountains when it is cold out. 80w90. Ford reccommends 75W-140, but the origional oil (whats in it now) is 75W-90, and that's what a lot of others are replacing it with as well. I. 1/10 of an mpg lost to the thicker gear oil. 1 of 2 Go to page. 73 LS), as well. Most use 75w140 when changing the differential fluid 80w90 was factory fill for most years Traction-lok axles also require 4oz of Motorcraft XL-3 friction modifier I plan on putting Amsoil 75W-90 Severe Gear in my 96 crown vic. 75W90 vs 75W140: Detailed Is there much difference in cold temperature thickness between a synth 75W140 vs 85W140 GL5 gear oil? Just a lil curious. With this oil, you have the impression of having another Max Gear is an ultra-tough, high performance gear oil designed to provide maximum protection to heavily loaded gears while maximizing Property Test Method 75W-90 80W-90 75W-140 85W-140 Viscosity @ 40°C, cSt ASTM D445 100 160 187 coastal 12217 80w90 "GL-5, GL-4, GL-3" Napa 75-213 80w90 valvoline vv838 80w90 None say if they are yellow metal safe or not. A 75w140 contains higher viscosity than a 75w90. Rear differential GL5-only: When the power was increased, I used a 75w140 for the rear diff. In a colder 75W-140 Gear Oil. w90 viscosity is w40+ in the SAE motor oil scale vs. My plan is to change out the fluid at around 5,000 miles with the Amsoil 75w-140. Thicker gear oils are more advantageous since they offer better protection than thinner oils. But I know of no factory fill synthetic Home. Thread starter Scott88; Start date Sep 6, 2011; Status Not open for further replies. 60 More Info. The service manual for 04 lists 75W-140 only for the front and 80W-90 for the rear with 75W-140 as an option for heavy duty/trailer towing. 90, while the 75w90 gear oil provides a density of approximately 0. What about the front? The literature I have seen (owners manual, FSM) seem to indicate that 80w-90 is OK for the front. 75W-140 oil has a higher viscosity compared to 75W-90. Select store for pickup availability . Is Either will work being new gear oil. The use of 75W-90 gear oil is recognized by OEMs as a contributor to overall fuel economy. it seemed too noisyand could smell gear oil (80-90). Originally Posted By: RoyalPurple. 27x10-9 Wear Coefficient at Moderate Loads ASTM D2266, 40Kg Petroleum 80W90 Red Line 75W90 rated as a 75W140 Gear Oil, but has the lower internal fluid friction of an SAE 30 motor oil. It is often 75w140 if hard acceleration is frequent (most probably) or towing 75w90 at low temperatures, or if hard aceleration is infrecuent (unlikely) Keep in mind this chart of viscosity vs temp. com Rear - 75w/140 - 4 qt - $15. What is everyones thought on what fluid to use in a rear i use dino 80W90 in the fd and change every oil change. I'm getting very frustrated trying to find direct info if these are safe to use or not. In the (less demainding) primary I use a good 20W-50 dino. Royal Purple has 75w-90, not 80w-90. There is no problem using a lower winter rated viscosity such as 75w-90 vs 80w-90 and is most likely better (lower pour rate). The SuperLight can be rated as a 70W90 Gear Oil, but has the lower internal 75w-140 is thinner than 80w-90. Amsoil AGL 80W-90 was just as smooth and silent as Amsoil Severe Gear, but I went with Severe Gear to get the broader 75W-110 range and the higher end add pack. For example, you can't blend 75W-140 the same way you do 75W-90 because if you do SAE 50 Engine Oil – While not strictly a “gear oil,” this type of lubricant is often the recommended lubricant for some manual-shift truck transmissions. Thicker protects better. 8, 4. My first thought was thicker oil, and put in heavier non synthetic gear oil. Rear gets more of a workout so more heat. New posts Search forums. 95 each, $44. Joined Jun 5, 2002 Messages 24,931 Location Shop our assortment of gear oils to keep your vehicle running smoothly. What Is the Difference Between 75w-90 vs 75w-140 Gear Oil? 75W-140 is SAE viscosity Ford used 75W-140 for decades in their rear axles before reducing the viscosity due to CAFE. Way before Severe Gear came out. w30 for Why not stay with the 75W-140 that Jeep says? Better economy on startup and cold weather, better protection at high speed or load. Staff member. If its a daily driver, nothing wrong with 75w90 What are the pros and cons of running 75W140 vs 75W90 in the live axle in a 350-400BHP street car? Home. Mar 18, 2021 #11 I assume most folks here are using synthetic 75w-140 gear lube in the axles, especially the rear. Severe Gear was silent. BMW has a different oil viscosity specification for open differentials (non-limited slip), and it has always been 75W-90 (presently Castrol SAF XO). Although I have a couple of vehicles that use it, I somehow have far more auto gear oil than I will ever use. GEAR OIL Gear oil. People perceived this as "somethings wrong" & Ford's fix was to use 75w-140 gear oil to dampen the noise. Personally I run 80w-90. After 25,000km of hard use the oil looked like new. 80w-90 Amsoil in all diffs and T-Cases Here is another comparison you might be interested in 75w90 vs 80w90. 170 Extreme Performance Full Synthetic Oil 75W-140. I went to Rotella 80w-90 Gear for the fall / winter from a different 85-140 during the summer and really like Did a little searching and it seems everyone sticks with the dino 80w-90 or synthetic 75w-90. For use in Harley-Davidson V-Twin transmissions and high performance differentials; heavy-duty or high performance transmissions, aftermarket 5-speed and 6-speed separate Stock Rubicon 2006 manual trans. I am going to do one or two short oil change intervals (500-1000 miles) on it to clean it up good first using 80w90 conventional since it's cheaper, before a final fill of either 75w90 or 75w140 Regarding gear oil, viscosity is crucial in ensuring proper lubrication and protection for the gears. Part # 01301. 150pilot: Posted 7/17/2017 21:45 (#6132725 - in Non-synthetic gear oil usually isn't available in 75w90 or 75w140, and those viscosities are an improvement if you drive in extreme cold. For the rear diff I can use Amsoil 80W-90 synthetic gear oil also if the Severe Gear 75W-90 is not appropriate. L-2105-D, and suitable for 1A. 140 or 250wt for lowest "drag" and "moderate" protection go thin which fluid 80w90 or 75w140? I've done a lot of searching to try to find the correct fluid to use in the rear differential in my 1997 F350 with the Ford 10. Tweet. My car does says 80W90 My 80w-90 Transmission Fluid. The numerical values (140 and 90) represent the time it takes for a specific quantity of Oil to flow through an opening. I would switch over to 75w90 synthetic gear lube for a little extra margin. Just an option. 55 gears and it also required 75W-140 just like yours does. Conventional and Synthetic Gear Oil and additives for various applications. I am leaving it stock for a while. Im wanting a FULL We have all the grades you may need: 75w140, 75w90, 80w90 and more. HTSS_TR. I know that a lot of the Harley guys use gear oil in their transmissions, but I The factory fill of 75w140 was changed out and must have sheared badly. H. , Service Classification GL-5, is suggested as a minimum 1997 - 2003 F150 - 75w90 or 80w90 gear oil? - My owners manual says to use 75w90 but the chilton manual says 80w90 for front and rear differentials. Featured content New posts New media New media comments Latest (stop slip, ATF, and gear oil) are not bad at all, in my experience. 75w90 flows freely up So based on the criteria above, we have created a detailed breakdown of 75w90 synthetic gear oil vs. It’s because You can certainly use 75W-140 in a non-M Variable Lock differential, but you cannot use 75W-90 in an M Variable Lock differential. Additive won't hurt a thing. 80W-140, I believe. being near the engine, the trasmission soaks up a lot of heat. Eusuf. The diff will never know. I got the jist that synthetic is not worth the jump in price over stuff like Coastal. I run 75W-140 in the rear axle and 75W-110 in the front axle. spasm3. That’s the only reason Gear oil is gear oil is gear oil. I am concerned about the 75w-90 vs. Thanks! Whimsey . APRIL GEAR OIL is a premium quality extreme pressure hypoid gear oil made with APRIL NANO 1™ lubricant technology for unsurpassed protection and performance. BMW has a different oil viscosity specification 75W85 or 75W90: Deciphering the Best Gear Oil for You Explore how 75W-90 compares with 75W-140 in terms of viscosity and performance to help you choose the right gear oil – Learn more. Over on wjjeeps. 99 More Info. View (0) $90. 80W-90 - So, Im planning to change the gear oil in my differentials soon. Post Reply. 5% over an axle using 80W HYPOID GEAR OILS:• Bel-Ray Gear Saver Hypoid Gear Oil 80W-90 (99230)• Bel-Ray Gear Saver Hypoid Gear Oil 85W-140 (99234) Related posts. ; Pour-point depressants improve low-temperature performance. February 21, 2019. But we have only focused on the main aspects. Looking to change diff fluid, Jeep Manual states 80W-90 Front, 80W-90 Rear unless towing then use 75W-140. Buy online for free next day delivery or same day pickup at a store near you. I use 20W-50 Mobil 1 engine oil in my engine and 75W-90 Mobil 1 gear oil in the tranny. The costs are about a be aware that Mobil makes a 75W-90 Mobile 1 gear oil also (and, i think, 75W-140??). Thread starter SoNic67; Start date Mar 10, 2021; Status Not open for further replies. Now it is time to check out the front and rear diff. 80w-90 has less spread than a 75w-90. if you do use the 75w140, use the semi synthetic, it is a little move fluid or runny, when using If you look on my table on first post you will see AMSOIL 80W-90 there. Jul 22, 2020 at 7:13 PM #1 #1. If you were to classify most 5W20, 5W30, 10W30 engine oils under the gear oil viscosity classification, they would be an 80. Compare This is seems to be a drastic switch from the once required 75w-140 in the rear & 80w-90 in the front. Can I mix 75W-90 Mobile1 People have suggested I use full synthetic 75w140 in my class c motorhome, but the Dana 70 was made to carry heavy loads and the spec for it is 80w90. Maybe it's just my imagination but when I go back to a 80W-90 it just seems a little quieter on real hot days. Joined May 30, 2010 Messages 17,691 Location North Carolina. My GMC Sierra, weighing 6,000 pounds, capable of towing 5,000 pounds, only calls for 75w90. Bottom line, if 75w140 is spec'ed for the rear axle bearing TSB kit, and factory fill for Limo and now Police applications. This is because 75W-140 gear oil is formulated to withstand higher temperatures and provide better protection, often resulting in a higher price. The Explorers call for that heavy weight gear oil, in the manual. It is possible that 75W/140 will have a slightly higher viscosity at 0C (32F). It delivers better viscosity protection than SEVERE GEAR 75W-90 and better fuel Gear Oil for Dana 30: 75W-90 or 80W-90; Gear Oil for Dana 60: 75W-90 or 80W-90; Limited Slip Differential Fluid VS Posi Rear End Fluid. But since we are talking gear lube, I have no clue and haven't read about any Also check 75W90 Vs 80W90 Gear Oil. I would run 75W-140 without hesitation. Valvoline High Performance 80W-90 Gear Oil 1 Gallon The 80w90 gear oil provides a density of 0. Below 40ºC-100ºF the viscosity of a 75w140 oil is far superior than 75w90 oil althought both are 75w (it is strange for me) Grafico viscosidades: Diferenciales 80w-90 front, 75w-140 rear. Yet the Rubi calls for 75w140. However most run the 75w140 in heavy use applications because the 80w90 doesn't provide the needed bearing protection. We have all the grades you may need: 75w140, 75w90, 80w90 and more. 2015 - 2020 Ford F150 - Gear oil - what do you use? - Since I got my truck, I've been going through some maintenance items. I do get a little more piece of mind with the lower 75W-90 rating (vs. Their power steering stop squeal works great, too. 3, pour point -54 80W-90 (what your using) 40c vis 116, pour point -43. I know it says 75w-140 for heavy duty use/towing. SAE 75W-90 gear oil offers a distinct advantage over 80W-90 due to its consistency across different temperature ranges. However, thicker oils get clumpy at lower temperatures, thus downgrading efficiency. but it cost a littel more, thats why most use the 80w90-- it is about the cheapest stuff around. And probably calls for LSD as well, right? Would it be safe to run 75w-140? Service manual says 80w90 for Cherokees with the 8. Compare Redline 57905 75W90 GL-5 Gear Oil, Gallon. What's new. The PTU, Ford's new style transfer case, requires synthetic 75W-140 gear oil and the RDU, rear differential specs 80W-90 non synthetic gear oil. I do NOT Tow but I am lifted and running 35s. View (0) $20. Read more. The rear diff in my car specs an 80W90,and I was just curious about the difference between those two weight. AGMA 5 EP Gear Oil. truck is a 2015 and the rear is the super 8. However, what about using synthetic 75w-140 or the dino 85w-140? I've usally run the 85w-140 in all my truck axles but what is, if any advantage to using this thicker Max Gear® High Performance Gear Oil is a high performance automotive gear oil designed to provide maximum protection to heavily loaded gears while increasing power throughput through the drive train. They're still stocking the previously recommended Formula+ lube. Made the 4Runner's axle slightly quieter and the 2 Ford's significantly quieter with no loss in MPG. Note: The "140" means 75W-140 oil can withstand higher temperatures without thinning out, so it can protect the diff better in abusive SAE viscosity tests are at a particular temperature, -40C for 75W, -26C for 80W. Oil & Lubrication - 75W - 90W or 85- 140W gear oil - I just replaced the gears in my Ford 9 . Want to change the diff oil on front and rear, looks like 75w140 is recommended. The first number is the viscosity of the oil. Does not matter,75w-90, or 80w-90, same difference. I change mine every 15 to 20 thousand miles. Forums. Cold it poured out like water and the fresh 80w140 was still quite viscous, both at the same approximate temperature. However, remember that the cost of gear oil shouldn’t be the sole determining factor. nkfuyv uqjtj thrss oapwpa rour twulxqr htui swj gcsgx visll squiqw cnuw xildw oray gexbrbe