Gl4 vs gl5 gear oil

Jul 15, 2024
Was doing some searching on clutch topics and noticed a bunch of posts about GL4 vs GL5 in manual trans. Since I had recently put synthetic GL5 in mine looked further into it as shifting seemed notchy, clank when engaging gears (all rear new poly bushings and poly diff mount installed), and noisey when deaccelerating. ... Don't put gl5 gear oil ....

We would recommend the use of a GL-4 rated fluid such as Castrol Hypoy 80w-90 (Not to be confused with Hypoy C 80w-90 which is a GL-5 product). A GL-4 oil may be employed in certain manual transmissions whereas a API. GL-5 gear oil designates service of hypoid and other types of gears commonly found in rear axles.There is much sliding on the gear teeth, and the oil has to be blended for that. These are called hypoid gears. A gearbox without hypoid gears, like a transmission, does not need this particular additive package in the oil. GL-4 gear oil works well. Some GL-5 oils used a sulfur based additive to make them GL-5, and the sulfur would damage ...Eliminates notchy shifting, even when cold. Satisfies the gear oil viscosity requirements of 75W90, 80W90, 90 and motor oil viscosities of SAE 40, 10W40 and 15W40. Recommended for GL-1, GL-3 and GL-4 applications, as well as where most special synchromesh fluids are specified. Availability: Available in 7-10 days. SKU: 50304.Most new car auto dealers have GL4 gear oils. Source some GL4 manual transmission 75w85 or 75w90 from a Nissan Hyundai Kia Mitsubishi GM Ford or Chrysler... dealership. European vehicle delaerships also have a good selection of GL4 MT gear oil... BMW Audi VW Peugeot Renault Fiat.... 10w40 motorcycle oil and 15w40 diesel engine oil are also a ...Mar 22, 2009. #5. Wait. GL-5 does not supercede GL-4, the only diff is coefficient of friction for syncro engagment. Also, GL-5 does not corrode brass and bronze. Modern GL-5 also has an MT-1 spec, meaning ok for yellow metals. Often GL-5 works fine w/syncros, although it is a 'gear oil'. GL-4 is for trans. I keep ckicking on these threads to ...GL-5 in GL-4 Applications: Using a GL-5 oil would not cause too many problems if the gear system runs in moderate circumstances with reduced stress and load requirements. This is especially true for passenger cars with manual gearboxes that are not used much. GL-4 in GL-5 Applications: On the other hand, if a car’s manual gearbox …Getting ready to change the oil in my AX-15 manual transmission. My owners manual specifies gear oil w/ a GL5 rating, so I went out and bought 4 qts of Mobil 1 75W-90 synthetic. When I got home, I checked the service manual, and it says use oil with a GL-3 Rating. Hmmm. There's a conflict here.Aug 2, 2016. #2. Re: Smith & Allan Fully Synthetic 75w-90 GL4/5 Gear Oil? You must put GL4 oil in the gearbox. GL4/5 is NOT suitable. GL4 is safe to use with yellow metal components, the other sort is not and can cause rapid erosion of said yellow metal parts. DarrenH. Posting Guru. Aug 2, 2016. #3.Lucas SAE 75W-90 Synthetic Gear Oil is a non-foaming, super slick, long lasting lubricant designed especially for heavy duty or high performance applications where other gear lubricants just aren't good enough. Contains a special additive package that cushions gears and resists "squeezing out" under extreme pressure situations where other gear ...GL4 does not have the extreme pressure additives that GL5 does. So GL4 will not protect the diff properly. GL5 physically damaged transmissions with synchros but that isn’t relevant to this discussion since it’s the opposite situation being asked about. BLtheP, Oct 3, 2022.I just went through this fiasco wondering why I couldn't use 75w90 gear oil vs the 75w80 my manual tranny calls for. Molakule should chime in here but you really need to stay with a GL4. I ended up buying redline MTL which is …The actual Redline MTL I bought for the transmission is a 75W-90 GL4, but I did just find the Redline 75W-90 GL5. Looks like that could work too! That actually looks like a great oil. Less viscous in the cold too. I got lucky buying my 5 gallons of the Redline MTL, but I wasn't so lucky finding a deal on the GL5 75W-90. That stuff is no joke!!!Serie aceite para transmisiones; en este video comparamos y explicamos diferencias entre un GL4 y un GL5 para una aplicación de transmisión manualGear Oil; SAE 75W-90; High Performance; 1 Quart; ... vans and heavy-duty trucks where an API-GL5 or GL-4 fluid is specified; Brand Information. Valvoline is a leading worldwide marketer and supplier of premium branded lubricants and automotive services for more than 150 years. In fact, Valvoline introduced the first commercial motor oil in the ...Sta-Lube API/GL4 Multi-Purpose Gear Oil 85W90 SL24259 - 5 Gallon, GL4 Hypoid Gear Oil for Corrosion Protection. 5.0 out of 5 stars. 1. $252.16 $ 252. 16 ($0.39 $0.39 /Fl Oz) FREE delivery Wed, May 29 . Only 17 left in stock - order soon. Stens Lucas Oil 10047 SAE 75W-90 Synthetic Gear Oil/Transmission and Differential Lube - 1 Quart.Thoughts on using 75W90 Gear Oil GL5 for transfer case vs. recommended LF45W GL5 gear oil. Discussion in '5th Gen 4Runners (2010-2024)' started by LKN4Runner, Sep 3, 2023. Post Reply. Page 1 of 2 1 2 Next > Sep 3, 2023 at 6:19 AM ... It's a 70/75w GL4. nimby, Sep 3, 2023 #6. Old Tanker, 7Runner and 3JOH22A like this. …Castrol Syntrans Transaxle 75W-90 which has API/GL4 specification. After some reading GL5 means that it is for diff (extreme load with shocks) and GL4 is for transmission (not that extreme load). The main difference should be more additives in GL5 which provides the extra protection but these additives can be harmful in transmission …Offers quicker shifts, A perfect synchronizer coefficient of friction. Eliminates notchy shifting, even when cold. High performance gear protection and longer synchro life. Satisfies the gear oil viscosity requirements of 75W, 80W and motor oil viscosities of SAE 30, 10W30 and 5W30. Recommended for GL-1, GL-3 and GL-4 applications as well as ...Yes, you can use 75w85 instead of 75W90. The two oils are very similar, and one will work better in your car. The main difference between the two is the oil viscosity or thickness. Usually, 75W90 is slightly thicker than 75w85, so it can offer better protection for your engine in extreme conditions.As for the 50 SAE weight most think its thinner... WRONG! its actually more like 90W gear lube its thicker. So the 75w85 is like 10w30 engine oil in viscosity. Basically the only spec you need to cover is Synthetic GL-4 gear lube. Mopar1973Man -=- Michael Nelson -=- Mopar1973Man -=- Achieve Your Destination.GL5 has more EP than GL4. vpracingfuels.com. "They make GL4 gear oils with enough EP additives to protect spur and helical gears in manual transmissions. A GL4 will maintain the necessary balance of viscosity, detergency, and corrosion protection. This type of oil is perfect for vehicle gear applications with high levels of yellow metals.80W-90. SKU: 25031. 250 ml. High-performance gear oil based on selected base oils. With special additives for manual shift transmissions. Minimizes wear and noise. Outstanding corrosion protection and resistance to aging. Meets the requirements for API GL4 and GL5 performance categories and corresponds to SAE 80W-90 viscosity grade.It has been three years since I changed my differential and hub fluid, so it is time. I used Valvoline HD Synthetic 75W-90 which is on the Meritor Approved list (TP-9539) which also list the API rating as GL-5. I read in the TM that a API GL-4 is required and also saw that on a few of the FMTV Youtubers videos.Received 260 Likes on 161 Posts. GL-4 vs GL-5 4 speed gear oil. Ok so I want to change gear oil in my 75 L48 4 speed .. a little confuse on what I should use..my owners manual says 80/90W GL-5 non Synthetic…. However doing some research I am reading some C3 owners are saying you should use the GL-4 Synthetic…. Any opinions would be ...Slippery Pete 5cc Hand Pump Transfers Gear Oil, Transmission and Differential Fluids From Quart Bottles (Not for Red Line Quarts) (1) $11.49. Ford Genuine Ford Fluid XT-M5-QS Full Synthetic Manual Transmission Fluid - 1 Quart , black. $33.03. Ultra1Plus SAE 75W-90 Synthetic Gear Oil, API GL-4 (12 QTS) $94.75.14,612. 113. *CENSORED*. Mar 2, 2015. #2. 80W90 should be fine. I know there has long been a debate over GL4 vs GL5 in older transmissions with brass synchros. Personally, I'd seek out some GL4 which Napa usually carries. As far as brands go, I've always been a Valvoline guy but any name-brand should be okay.I was recently looking at tranny fluids and gear oils, because I want to change both fluids. My '96 A4 Quattro calls for G4 spec tranny fluid and GL5 rear differential oil. GL5 spec lube will attack brass synchros due to high sulfur content. Now, I've seen there is a bunch of GL4 fluids that pass GL5 requirements, while also meeting GL4 specs.A GL-4 gear oil is suitable for use in a zero or low. offset hypoid gear application, where extreme pressures of a high offset hypoid are. present a GL-5 gear oil is required. In your transaxle where high offset gears are not. present, a GL-4 gear oil could be used though we would recommend a GL-5 as called. for.”.No, there are EP oils not suitable for hypoids gears. EP is an oil propertie necessary for specific systems. Hypoid is a gear contact that usually requires high EP properties (but there are hypoid gears to work with medium or low EP like GL4+, GL4 or GL3). # Is EP/hypoid required just for hypoid gears, and other differentials, gearboxes …It replaces both the G52 and older G50 products. Recommended service interval is 100,000 miles. Amsoil recommends the GL-5/MT-1, 75w-90 Severe Gear for all VW/Audi final drives and differentials, including center diffs on quattros and rear diffs on Quattros that call for GL-4 or GL-5.The main difference between GL-4 Vs GL-5 gear oil is Extreme Pressure (EP) additives and their viscosity grade. You can use GL-5 instead of GL-4 to get faster transmission. GL-5 is a fully synthetic …In a nutshell GL4 oils don't hurt the soft brass synchros unlike GL5 oil, however GL5 oil is better suited for high torque/rpm applications because it offers better protection for the hard steel parts. Basically if the manual calls for GL4 make sure you use only GL4 specified fluid. 1. can_it_be_fixed.Buy Sta-Lube API/GL4 Multi-Purpose Gear Oil 85W90 SL24229 - 32 Fl Oz, GL4 Hypoid Gear Oil for Corrosion Protection: Gear Oils - Amazon.com FREE DELIVERY possible on eligible purchases. ... I drive mostly Mazda's all of which state to use GL4 or GL5, but it must be yellow metal safe. I have yet to find a GL5 that has been yellow metal safe and ...Gear for trekking in Latin America including backpack, clothes, hiking boots, trekking poles, jackets, power bank, universal adaptor, and more. With landscapes ranging from glacier...The GL4 vs GL5 has been debated to death. When GL5 first came out some of the additives were corrosive to "yellow" metals like bronze. This has been address and corrected, so any major brand of gear lube that is GL5 rated is OK to use. I use Swepco 201 80W-90 in my Berg 5 tranny.Buy Sta-Lube API/GL4 Multi-Purpose Gear Oil 85W90 SL24229 – 32 Fl Oz, GL4 Hypoid Gear Oil for Corrosion Protection: Gear Oils - Amazon.com FREE DELIVERY possible on eligible purchases. ... I drive mostly Mazda's all of which state to use GL4 or GL5, but it must be yellow metal safe. I have yet to find a GL5 that has been yellow …Hypoid gearboxes are found in most of today’s modern vehicles. They are commonly used in rear axle differentials, where they transmit power from the driveline to the axle shafts. They are a type of spiral bevel gear with a left-hand spiral angle on the pinion and a right-hand spiral angle on the crown. This lowers the driveshaft away from the ...Netgear (NTGR) isn't in gear yet but could make for a decent deep value play, writes value investor Jonathan Heller, who says the company best known for its Wi-Fi routers has p...Oct 19, 2018. #4. It's probably the same as the Total 75W80 GL4+. Judging by the smell...must have something other "synthetic" gear oils don't have, it has the typical smell pf gear oils, old school style. If it's really brass synchros, I'd stay with GL4 like the Castrol Syntrans multivehicle or similar, although I'm pretty sure the GL4+ should ...GL4 vs. GL5 Gear Oil. 1. Viscosity. While shopping for gear oil, you’ll have to consider the viscosity of the oil. As GL4 gear oil has fewer Sulphur components; it is less viscous. On the other hand, Gl5 gear oil has more Sulphur and phosphorous components, which increases the viscosity of the gear oil. 2. Required Additives.Vail Resorts is offering a new method for renting ski or snowboard gear. Here's everything you need to know about the My Epic Gear service. We may be compensated when you click on ...GL4 vs GL5 gear oil, the plot thickens. Jump to Latest Follow 41 - 44 of 44 Posts. 1 2 3. yarr · Registered. 1991 U1250 2002 U500NA Joined Aug 3, 2007 · 4,069 Posts #41 · Feb 16, 2011 ...Slippery Pete 5cc Hand Pump Transfers Gear Oil, Transmission and Differential Fluids From Quart Bottles (Not for Red Line Quarts) (1) $11.49. Ford Genuine Ford Fluid XT-M5-QS Full Synthetic Manual Transmission Fluid - 1 Quart , black. $33.03. Ultra1Plus SAE 75W-90 Synthetic Gear Oil, API GL-4 (12 QTS) $94.75.There is a lot of confusion surrounding the difference between 75w85 vs 75w90 gear oil, so in this article, I will cover all of the key differences. ... No, it is not recommended to use GL4 instead of GL5 oil. The API chemistry code for 75w85 oil is GL-5, but most specifications also require the ISO viscosity grade to be HTHS (High Temperature ...API GL-4 – Intended for gear sets with light to heavy load and sliding forces. GL-4 lubricants are often used in syncromesh manual shift on-road and off-road truck transmissions. API GL-5 – Intended for heavily loaded gear sets with high sliding forces such as hypoid differentials.Serie aceite para transmisiones; en este video comparamos y explicamos diferencias entre un GL4 y un GL5 para una aplicación de transmisión manualThe state-of-the-art technology in Mobil Delvac 1 Gear Oil 75W-90 delivers excellent performance, helps to protect against thermal degradation and oxidation, and contributes to reduced wear and corrosion, improved shear stability and extended service capability. This oil can be used for on-highway light- and heavy-duty trucks, buses and vans.In order for a GL5 gear lube to be used in an application calling for GL4 it must be dual rated so would see GL4/GL5 on the side of the bottle. ... and it was filled with Tech 2000 75-90 GL5 meets NM-1 also, the specs call for GL5, but Hey, Gear oil is Gear oil, GL5 must just be a bit better than GL4? 20,000 miles and 9 years on, the rear end ...Nov 30, 2009. #2. I think if a tranny calls for gl4 that's what you should use. You'll see that with most front wheel drive imports with brass synchros, so I agree with you there that gl5 should be avoided even if the bottle states it's backward compatible. However, if a tranny calls for gl5 you would be crazy to put gl4 in, like in the subaru 5mt.My KIA Ceed recoomends for manual transmission oil: 70W API GL-4. I cant find nowhere 70w oil, so can I use 75w oil (api GL4) instead? Yes, you can and you get stronger oil film for components protection . But you might have higher tendency of encountering morning cold shift harshness ,depending on your locality .Overfilling an automatic transmission causes the fluid to foam, leading to erratic gear shifting, oil starvation and transmission damage. When adding transmission fluid, checking t...01-31-2017, 01:02 PM. From what I know, it's not really a synthetic vs dino oil thing. It's the "rating" of the oil, GL4 vs GL5. For example, Merc's Hi-Perf synthetic stuff (excellent oil) is rated GL4. For what it's worth, I learned the "rating" thing here on this site. 2000 Yamaha OX66 250HP SX250TXRY 61AX103847T.Eliminates notchy shifting, even when cold. High performance gear protection and longer synchro life. Recommended for GL-1, GL-3 and GL-4 applications as well as where most special synchromesh fluids are specified. Satisfies the gear oil viscosity requirements of 85W, 75W85 and motor oil viscosities of SAE 30 and 5W30. Availability: In stock.Changing a Battery. Changing Your Oil. Checking Fluid Levels. Diagnosing: Anti Lock Brake System (ABS) Sensor. Diagnosing: Manifold Absolute Pressure (MAP) Sensor. Diagnosing: Variable Valve Timing (VVT) Maintaining Tires. Replacing a Belt. Replacing Brake Pads.Gear Oil; SAE 75W-90; High Performance; 1 Quart; ... vans and heavy-duty trucks where an API-GL5 or GL-4 fluid is specified; Brand Information. Valvoline is a leading worldwide marketer and supplier of premium branded lubricants and automotive services for more than 150 years. In fact, Valvoline introduced the first commercial motor oil in the ...If we compare 75w-85 and 75w-90, the 75w-85 is a lighter one and exhibits better fuel efficiency. If fuel efficiency is a major concern, definitely 75w-85 is what you should go for. Load Capacity: Depending upon the type of vehicle and the purpose it intends to serve, the load capacity is vital.Better overall performance than conventional oils. Use in manual transmissions and transaxles that require 75W-85, 75W-90 or 80W-90 gear lube and any of the following specifications: API GL-4; ZF TE-ML 02B, 16A, 17A and 19A; Chrysler* MS-9070; MAN 341-Z2 (formerly MAN 341 ML); MB 235.5. Replaces GM* part #12346190 and Chrysler part …21,579. Location. NE,Ohio. Apr 20, 2020. #7. most of the gl-5 rated wont shift as well as a gl-4 gear oil in a transmission. the specific application of gl-5 gear oil in a manual transmission is usually some sort of shared sump arrangement with a differential that requires gl-5. such as most MT equipped subarus.In addition to EP additives, these lubes contain rust inhibitors, defoamants, friction modifiers, thickeners, and Viscosity Index Improvers.”. So it sounds like ‘most’ GL-5 oils might be OK. But that’s just from this source. The SX4 MY09 owner manual strongly recommends the GL-4 75W90 gear oil. My dealer put the GL-5 (75W90) as the GL-4 ...A GL5 gear oil has about twice as much EP additive as a GL4, ensuring the greatest protection, performance, and efficiency for your hypoid gear system. Don’t use a GL4 gear oil in a hypoid gear system. It can not only reduce performance but also damage your gears.In summary: 1. GL-5 and MT1 rated gear lubes have a higher viscosity than MTF's of the same SAE Gear Oil viscosity range, 2. GL-5 and MT1 rated gear lubes have a different additive package than do MTF's; MTF's contain Anti-Wear additives, GL-5 and MT1 rated gear lubes contain Extreme Pressure (EP) chemistry. 3.The FSM states that GL-4 Gear Oil is to be used in the Starquest's 5-speed manual trans. I was gonna have my '88's 5-speed's gear oil changed yesterday. The only problem was I could not find a quick oil change place that stocked the GL-4 gear oil. They all only stocked GL-5 gear oil. So I backed ...Aug 31, 2020. #11. mallen said: 80W90 "Mineral oil" IS gear oil. It's also called 80W90 GL-1 gear oil. GL5 gear oil is what you use in your differential. GL5 and maybe GL4 (not sure about 4) MAY have addatives that can damage your transmission. Or it may not. Some GL5 specifically says it's ok.API GL-4 - Intended for gear sets with light to heavy load and sliding forces. GL-4 lubricants are often used in syncromesh manual shift on-road and off-road truck transmissions. API GL-5 - Intended for heavily loaded gear sets with high sliding forces such as hypoid differentials.Rochester, WA. Sep 23, 2010. #2. Barmanus said: I have read several places online that you should use GL4 in Tacoma manual trans. The manual says you can use GL4 or GL5. The people that say not to use GL5 say that it causes the syncros to spin longer and thus not shift as well.Indices Commodities Currencies StocksGL4 vs. GL5 gear lubricants. Thread starter wood_e; Start date Feb 4, 2007; Status Not open for further replies. W. wood_e. Joined May 29, 2006 Messages 78 Location Ames, IA. ... (GL4 and GL5) gear oil I would change it out to a GL4 oil. Pablo. Joined Oct 28, 2002 Messages 60,207 Location Everson WA - Pacific NW USA.Gear Oil Spec Difference in GL4, GL5 and MT1. had a few questions concerning different gear oil specs. Hope this helps. Service Designations in Current Use: GL-1: Denotes lubricants intended for manual transmissions operating under such mild conditions that straight petroleum or refined petroleum oil may be used satisfactorily.

Did you know?

That Semi-synthetic hypoid gear oil with extremely high performance reserves. Outstanding aging stability. ... API GL4, API GL5, API MT-1 . LIQUI MOLY also recommends this product for vehicles or assemblies for which the following specifications or original part numbers are required. DAF, Eaton, MAN M 3343 Typ M, Scania STO 1:0, ZF TE-ML 02B, ZF TE ...Nov 29, 2002 · The GL4 fluids seem work much better. Again, it is important to use a fluid that is specifically intended for use in manual transmissions. It is also important to use the correct viscosity, and there is a big selection of viscosities for GL4 and GL4/5. 1. 2.Halfords Differential Gear Oil EP 80W/90 GL-5 1L 724450 4.9 (42) 10 people are viewing now 5 purchases during last 48 hours Halfords Differential Gear Oil EP 80W/90 GL-5 1L 724450 4.9 (42) £11.79 Only £11.20 with Motoring Club premium. Fluid Type : Mineral Oil;

How AMSOIL SEVERE GEAR® 75w-90 100% Synthetic Gear Lube API GL-4 vs. GL-5 Gear Oils Definition and Importance of GL Ratings. The American Petroleum Institute categorizes gear oils using GL ratings that range from GL-1 to GL-5. This classification plays a crucial part in selecting the right oil, as it directly correlates to the oil’s capacity to ...GL4 vs. GL5 gear lubricants. Thread starter wood_e; Start date Feb 4, 2007; Status Not open for further replies. W. wood_e. Joined May 29, 2006 Messages 78 Location Ames, IA. ... (GL4 and GL5) gear oil I would change it out to a GL4 oil. Pablo. Joined Oct 28, 2002 Messages 60,207 Location Everson WA - Pacific NW USA.

When Hypoid Gear Oil 85W-90 - GL5. This is a top quality GL 5 gear oil and this is what we recommend for use in the gearbox and final drive of earlier model BMW motorcycles. Hypoid Gear Oil SAE 85W-90 is a high-performance, high-pressure gear oil manufactured from carefully selected base oils and multifunctional "extreme pressure" additives.Feb 11, 2016 · The GL5 lubes are an extreme pressure (EP) variant of gear oil - its additive package is different than the GL4 lube. For a transaxle that might see more shock-loading, see extreme use (low speed / high load) - the viscosity and additive package of the GL5, one paper, "should" be better than GL4. As additive packs go - GL4 tends to have 1/2 or ...GL4 does not have the extreme pressure additives that GL5 does. So GL4 will not protect the diff properly. GL5 physically damaged transmissions with synchros but that isn't relevant to this discussion since it's the opposite situation being asked about. BLtheP, Oct 3, 2022.…

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. Gl4 vs gl5 gear oil. Possible cause: Not clear gl4 vs gl5 gear oil.

Other topics

va beach accuweather

glue for car window

best camping tent heater GL-4 and GL-5 are specifications set by the American Petroleum Institute (API) that determine the performance characteristics of the gear oil. Also unlike engine oils, the API specifications for gear oils are not backwards compatible with each other. An API GL-5 gear lube will not cover the API GL-4 specification.14,612. 113. *CENSORED*. Mar 2, 2015. #2. 80W90 should be fine. I know there has long been a debate over GL4 vs GL5 in older transmissions with brass synchros. Personally, I'd seek out some GL4 which Napa usually carries. As far as brands go, I've always been a Valvoline guy but any name-brand should be okay. black powder coatcraigslist personals duluth minnesota Look for manual transmission gear oil, that's GL-4. GL-5 should be okay in the scooter's gear box as long as there's no brass bushings. GL4 won’t eat brass components, GL5 will. There is a reason they use GL4. Use what the manufacturer recommends. The engineers pick these things for reasons. inscryption walkthroughhoroscope compatibility birth dateunited rentals santa fe Jul 16, 2021. #3. Hi - if the manual says GL4 or 5, then Toyota have already determined that either one is acceptable. In my opinion, you made the right choice for your gearbox. The main difference between 4 and 5 is the amount of Extreme Pressure (EP) additives - 5 having a lot more in it than 4. Gearboxes don't need as much additive as ...GL-4 gear oils are designed for compatibility with yellow metals such as brass, bronze and copper alloys; while GL-5 gear oils contain sulfur-phosphorus EP additives which may corrode these metals. GL4 vs GL5 are two similarly popular models. kentucky basketball 2024 recruiting class I was recently looking at tranny fluids and gear oils, because I want to change both fluids. My '96 A4 Quattro calls for G4 spec tranny fluid and GL5 rear differential oil. GL5 spec lube will attack brass synchros due to high sulfur content. Now, I've seen there is a bunch of GL4 fluids that pass GL5 requirements, while also meeting GL4 specs.80W-90. SKU: 25031. 250 ml. High-performance gear oil based on selected base oils. With special additives for manual shift transmissions. Minimizes wear and noise. Outstanding corrosion protection and resistance to aging. Meets the requirements for API GL4 and GL5 performance categories and corresponds to SAE 80W-90 viscosity grade. verizon store indianaplastic wheel well linereboni deon husband "GL5 is a different spec, and is not 'backwards compatible' with GL4. GL5 gear oil is a lubricant with very high extreme pressure performance needed for Hypoid gears where sliding and rolling contacts operate under very high loadings. This is achieved by incorporating high concentration of sulfurized additives.80W-90. SKU: 25031. 250 ml. High-performance gear oil based on selected base oils. With special additives for manual shift transmissions. Minimizes wear and noise. Outstanding corrosion protection and resistance to aging. Meets the requirements for API GL4 and GL5 performance categories and corresponds to SAE 80W-90 viscosity grade.