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Gl4 vs gl5 gear oil of Technology
Where the rear end states GL-4 or GL-5. I got Good Afternoon Mr. Steel, We list the Max Gear oils as GL-4 and GL-5 because they are non-corrosive to non-ferrous yellow metals (brass, bronze, copper) and still have GL-5 load carrying capability. We recommend Max Gear 75W-90 (part #01300, quart bottle) for the manual transmission in your Xterra ...GL is short for " GEAR LUBRICANT". API has the following GL classifications: for Gear Oils - GL-1: Oil without EP additive. GL-2: Usually contains fatty materials. GL-3: Contains a mild EP additive. GL-4: Equivalent to MIL-L-2105B and is usually satisfied by a 50% GL-5 additive level. GL-5: Equivalent to MIL-PRF-2105E. Primary field service …High Performance Gear Oil (GL4+) SAE 75W-90. High Performance Gear Oil (GL4+) SAE. 75W-90. SKU: 4433. 500 ml. Fully-synthetic gear oil. Produces precise friction characteristics and offers outstanding resistance to aging. Exceeds the high test requirements of well-known vehicle manufacturers. Ensures assemblies function perfectly, even ...What is the source of GL5 recommendation; my toyota takes GL4 or GL5; Quote: MANUAL TRANSAXLE Oil capacity, L (qt., Imp. qt.): 1.9 (2.0, 1.7) Oil type: Gear oil API GL-4 or GL-5 Recommended oil viscosity: SAE 75W-90 edit:I checked the OM for your car on the Toyota website; the spec is GL4 or GL5 Redline MT90 or Amsoil MTG is a good choice.Very early 90 and 110’s were fitted with either LT95 4-speed (also fitted to early Classic Range Rovers) or LT85 5-speed gearboxes. These boxes are very robust and when mated to engines in standard tune are relatively unstressed. Consequently, both boxes can be filled with a 15W50 or 20W50 engine oil (API SG/CE or ACEA A2-96/B2-96).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 ...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 calls for GL ...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.Join Date: Dec 2000. Location: Norway / Merritt Island FL. Posts: 218. GL-5 is not better than GL-4, just different. In general terms, the higher the GL number the more EP, extreme pressure, additive the oil contains. The EP additive used to be sulphur based, hence the bad smell at high tempperatures.However, if a tranny calls for gl5 you would be crazy to put gl4 in, like in the subaru 5mt. W. widman. Thread starter Joined May 27, 2002 Messages 3,355 Location Bolivia. Dec 1, 2009 #3 Exactly . edhackett. Joined ... How about a GL-5 gear oil that passes the ASTM D-130 copper strip corrosion test with a rating of 1b, or even better, 1a? ...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.That means 80/90 w in the trans and rear end. With that said the Travelers gear oil 80W-90 is not the correct oil because it is GL5 oil. It may say it is compatible with older equipment but I will continue to buy GL4 oil as long as it is available. Choose what ever brand you like but make sure it is GL4 90w oil. T.Mazdaspeed 3 takes the same oil as Mazda3 which is API GL-4 or GL-5 in a 75W-90 viscosity. Mazdaspeed3 also contains limited slip and would need an additive with some gear lubricants. AMSOIL GL-5, 75W-90 (product code SVG) does contain a small amount of limited slip additive.Join Date: Dec 2000. Location: Norway / Merritt Island FL. Posts: 218. GL-5 is not better than GL-4, just different. In general terms, the higher the GL number the more EP, extreme pressure, additive the oil contains. The EP additive used to be sulphur based, hence the bad smell at high tempperatures.The main difference between GL4 and GL5 is that the former has more additives to boost its extreme pressure. The additives, in this case, are phosphorous and sulfur compounds. They help by providing a sacrificial layer on the gear surfaces to reduce their degradation rate.ACDELCO is transmission oil, Mini/BMW (MTF94) or Redline MTL are transmission AND transaxle oil, you need to look at the label for what its designed to do, additives, its API type. Oil is cheap, a gearbox isn't. Amazon.com: Red Line (50204) SAE 75W80 API GL-4 Manual Transmission and Transaxle Lubricant - 1 Quart: Automotive.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.A GL5 oil has been improved 2 times over the GL3 oil. GL5 oil has additives that could be harmful to yellow metals (brass) so be careful about what you use in a manual transmission. Many of the manual transmissions have brass blocker rings and thrust washers in them. Check it out before you buy it.Jan 24, 2002. Messages. 4,698. Sep 22, 2013. #11. Re: lower unit oil vs. gear oil. Water kept is suspension in the oil prevents corrosion on the gears and bearings, plus still has lubricating properties. If left in over the winter, the separated water freezes and damages the gearcase. M.Oct 22, 2015 · 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.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 gear oil with viscosity grade SAE 75W90. On the contrary, with SAE 80W90 viscosity grade, GL-4 is also a fully synthetic gear oil.This is particularly true of many GL4 applications - I would *not* try to replace GL4 with GL5, especially in a modern manual transmission where they specify GL4. GL5 may have superior properties, but it is different. In the case of your tractor, I would recommend that you use GL2 or GL2-GL4. The GL2-GL4 is supposed to meet the specifications ...I would use 75W90 viscosities for both gearbox and diffs/portals, in your climate. But be sure to use GL4 for the trans/Claas and GL5 for the axles/portals.Either Amsoil SVG or Delvac Synthetic Gear Oil 75W90 for the axles/portals; Amsoil MTG or Delvac Synthetic Trans Fluid 50 for the trans and Claas. Don't use GL4 transmission fluid in the ...651. Location. Toronto, Ontario, Canada. Nov 16, 2009. #2. For the most part, any GL4 fluid (NOT GL5 or dual-rated GL4/GL5) will be safe for yellow metals as a rough guideline. Some dual-rated GL4/GL5 fluids are safe for yellow metals, but they should specifically say so in the specs, otherwise, assume it is not safe.Jan 4, 2022. #1. This is for my front bevel box and rear diff on my Sportwagen. LM GL4+75W90 is $13/1L vs. the Redline GL4 75W90 at $19/L at FCP Euro. Not sure of the "GL4+ (GL4/GL5)" designation on the LM, as far I can see, I need GL4 for both of my applications. This is for a ~70K/3 year change which will be about my interval going forward.MT-90 is a thicker 75W90 version of MTL. The shear stability and oxidation stability of these products are excellent, thus the physical characteristics of Red Line MTL and MT-90 will change little with use. MTL. MT-90. The MT-90 is a 75W90 GL-4 Gear Oil that’s slightly heavier than MTL.75W-90. SKU: 1413. 500 ml. Fully-synthetic gear oil. Produces precise friction characteristics and offers outstanding resistance to aging. Ensures assemblies function perfectly, even under extreme operating conditions and when exposed to large temperature fluctuations. Maximum lubrication reliability, maximum wear protection due to broad ...Lead Amounts. While both of the oil types have lead present inside them, GL4 produces far less lead than GL5. As a matter of fact, the reason why there are high amounts of additives inside the GL5 is to reduce the effect that can be caused by the high amount of lead which is extremely toxic. Reaction With Metal.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 ...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.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 ...QUICKSILVER 858064Q01 SAE 90 High Performance Gear Lube , 32 oz. Clean oil is essential in reducing friction and preventing damage to internal components, providing many years of engine life. Engineered for sterndrive and outboard lower units, this High Performance SAE 90 gear oil has been extensively tested to ensure impressive protection ...Nissan has the same problem with 75W -90 oil, but their manual clearly states 75W -80 for 6 speed transmissions and 75W-85 for 5 speed transmissions. It does not spe cify "non sulfur/phosphorous" oil, instead referring to "Genuine Nissan Oil" (which does not contain those additives). VW calls for 75W oil that meets their spec.The OEM fluid is GL5 in my MT. They recommend using GL5, as per owners manual instruction. I called 'em on it and emailed the company directly - they told me "GL4 will extend the service life of your manual transmission over GL5". So I put in Redline GL4 @ 9K mi. - tranny shifts much smoother and slightly quicker, almost "falls" into gear now.Jun 3, 2004 · Thanks! To the best of my knowledge they are not interchangeable. The GL-5 has more Extreme Pressure (EP) additives than the GL-4 and different oxidizers. It is my understanding that GL-5 gear oils are for Highly loaded Hypoid gear differentials only. The Gl-5 can ruin bearings in a GL-4 application.Bharat Gears will release earnings for the most recent quarter on May 30.Wall Street predict expect Bharat Gears will report earnings per share of... On May 30, Bharat Gears is rep...Higher speeds, higher torque and heavier loads require improved formulations to maximise equipment life and optimise operating costs. Longer service intervals place additional demands on the gear lubricant requiring effective basestock and additive systems. Mobilube HD Series of gear lubricants are engineered to meet these challenges.All you need to know about how robust and efficient commercial aircraft landing gear is. "I didn't even realize we'd landed!" Of all the comments pilots like to receive from passen...By Staff Writer Last Updated December 07, 2023. The main difference between GL-4 and GL-5 gear oils is how much extreme-pressure additive has been included in the mix. GL-5 oil has roughly twice as much of the EP additive as GL-4. Gear oils all include some level of sulfur or phosphorous additive. FYI: I have a valvoline (this bottle doesn't say fusbr711. 17570 posts · Joined 2010. #3 · JuVP Classic Gear Oil GL4 SAE 80W-90, 1 Qt. ... Royal Purpl
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Fully Synthetic Hypoid Gear Oil (GL4/5) SAE 75W-90 . SKU: 22090 . 1 l, 22083 . 20 l. ... Specifications / Approvals: API GL4/GL5/MT-1 LIQUI MOLY also recommends this product for vehicles or assemblies for which the following specifications or original part numbers are required: BMW 83 22 2 365 987/Synthetik OSP, MB 235.8/235.11, ...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.The marine version is about a buck more per quart. Marine Gear Lubes have a bit more of the following: Emulsifiers. Corrosion inhibitors. Rust Inhibitors. So the cost is higher because the addpack is more expensive. Unless you are covering your diffy with water by crossing streams or such you don't need it. H.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 ...Purely from the perspectives of gear shifting (comfort), a GL4 carries Friction Modifiers to achieve desired ratio of static/dynamic Coefficients of Friction (which was never part of GL4/GL5 specification requirements ) , and it's not about components protection. Hence, a product that claims GL4/GL5 or GL4+ as provided by OP above, …Foreword. This publication describes API automotive gear lubricant service designations. It is designed to assist manufacturers and users of automotive equipment in the selection of transmission, transaxle, and axle lubricants based on gear design and operating conditions. Where special performance requirements apply, the descriptions in the ...You can sit yellow metals in a bath of GL5, and it will be fine months, years later. A manufacturer can market a bottle of GL4/5 gear oil and state truthfully and lawfully "will not corrode yellow metals". The reaction of the phosphorus and sulfur in high pressure scenarios; however, will peel way at the yellow metals...Dec 5, 2023 · 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 calls for GL ...80W-90. Mineral-based hypoid gear oil with extremely high performance reserves and excellent aging stability. Ensures assemblies function perfectly, even under extreme operating conditions and when exposed to large temperature fluctuations. Minimizes wear and has outstanding viscosity-temperature properties. Allows long oil change intervals.Older GL-5 formulations, and a few current ones, have a high proportion of certain additives that do damage to copper/brass/bronze yellow metals. Modern Gl-5 additives do not have this problem. Use any GL-5 gear oil that states that it is also good for GL-4. GL-4 was a 1943 spec, and now rarely needed. S.Understanding the differences between GL-4 and GL-5 gear oils is important for knowing their intended uses, but it is also important to be aware of any compatibility problems that could occur if you think about switching. Deviation from these criteria may negatively impact the overall performance and constituents of the gear system.Aug 13, 2011 · 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 traditional GL-4 gear oil of any given viscosity has about ½ of the level of sulfur/phosphorous additive that would be in the GL-5 product, so the bond is not as strong, and therefore can be peeled off without peeling a layer of brass (or less brass). This means that the GL-4 product provides a little less extreme pressure protection, so in ...My first choice is Valvoline 80W90 conventional GL4/5 gear oil. ... gear lube that meets BOTH GL4 *and* GL5. That typically means a GL5 w/ it's respective EP additives that have been either buffered or fundamentall modified so as to be non-corrosive to synchros. The ONLY conventional 80W90 GL4/GL5 I am aware of ANYWHERE is Valvoline 'High ...GL-4 is the only way to go with our cars." This is correct. Many GL-5 gear oils use a sulfur-based additive package which chemically etches itself onto the face of iron/steel gears and acts as an extreme-pressure agent to protect them from more serious wear. However Newer ones (Chevron Delo gear oil) use a non-corrosive boron-based …Product Description - EP90 Gear Oil GL5 Data Sheet. Midlands Lubricants EP 90 Gear Oil GL5 is a high performance extreme pressure multigrade gear oil with high anti-scuff properties, meeting the most severe demands of hypoid final drive gears. Suitable for use in all spiral bevel axles steering gearboxes where API GL5 and MIL-L-2105D ...Many GL-5 gear oils also meet the GL-6 spec, but some slide by with only about 40 lbs on their GL-5's, so some manufacturers still recommend GL-6. Nissan is one of these (at least for this part of the world where the going is rough). GL-4 oils, when recommended are usually recommended for the transmission, where torque is much lower than in the ...The differentials can use any common gear oil that meets specifications (75W-85, GL5) regular or synthetic. $30 75W-90 Synthetic Gear Lube - 1 Quart (Pack of 2) 75W-90 is commonly used, there is no cutting edge technology in there, differentials generally aren't fussy.Is Tesla Stock (TSLA) Back In Reverse Gear?...TSLA Employees of theStreet are prohibited from trading individual securities. Despite the intraday reversal in Apple, Microsoft, Alph...Lucas Oil Products Heavy Duty SAE 85W-140 Transmission & Differential Gear Oil: Anti-Wear And Lubricity Agents, 1 Quart. Part # 10042. (42 reviews) 30 day replacement if defective.Lucas Oil Products Heavy Duty SAE 85W-140 Transmission & Differential Gear Oil: Anti-Wear And Lubricity Agents, 1 Quart. Part # 10042. (42 reviews) 30 day replacement if defective.I would use 75W90 viscosities for both gearbox and diffs/portals, in your climate. But be sure to use GL4 for the trans/Claas and GL5 for the axles/portals.Either Amsoil SVG or Delvac Synthetic Gear Oil 75W90 for the axles/portals; Amsoil MTG or Delvac Synthetic Trans Fluid 50 for the trans and Claas. Don't use GL4 transmission fluid in the ...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.AMSOIL SEVERE GEAR® 75w-90 100% Synthetic2. According to ETK cars with production d
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Gear Oil for Manual Transmissions; Show details for MT-LV 70W/75W GL-4 Gear Oil. MT-LV 70W/75W GL-4 Gear Oil. Meet our newest addition to the GL-4 family! Learn More about >MT-LV 70W/75W GL-4 Gear Oil. Show details for 75W140NS GL-5 Gear Oil. 75W140NS GL-5 Gear Oil.Choosing gear oil for your vehicle can be quite a challenging experience. Especially when you come across terms like GL4 and GL5, you do not have the slightest clue which is the best. In general, GL4 and GL5 have different additives and are used in disparate applications. For instance, GL5 gear oil contains more EP additives than GL4 oil.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.To revive the dead and bring up my findings over the past few days as far as fluid in the AX-5/ AX-15: These fluids are APPROVED for use in these transmissions: -10w-30 motor oil (a good synthetic) -75w-90 gear lube GL-3 or GL-4 (NOT GL-5 that will eat your brass syncros) [_> This includes the popular (but expensive) Redline MT-90 which many ...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!!!Jul 5, 2022 · Learn how GL-4 and GL-5 gear oils differ in EP additives, severity and applications. Find out why AMSOIL SEVERE GEAR Synthetic Gear Lube is the best choice for your vehicle.Engineered to provide maximum performance and protection of manual gearboxes being used in severe racing conditions. Advanced extreme pressure additive package improves performance under high loads, delivers excellent durability, wear protection and superior shear stability. Formulated specifically for high-performance gearboxes. Enhanced film ...Posted: Mon Nov 05, 2007 12:29 pm Post subject: gl4 vs gl5 gear oil in syncro: i have heard differing opinions on this. syncro.org says not use gl5 in transaxle but in front diff okay does any confirm or deny this? Back to top: ... The finest GL5 gear lubricant available is Swepco 201 (or 203). It is a mineral based oil that was designed ...Join Date: Dec 2000. Location: Norway / Merritt Island FL. Posts: 218. GL-5 is not better than GL-4, just different. In general terms, the higher the GL number the more EP, extreme pressure, additive the oil contains. The EP additive used to be sulphur based, hence the bad smell at high tempperatures.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.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.Lucas Oil 10048 Synthetic SAE 75W-90 Gear Oil - 1 Gallon. dummy. Lucas Oil 10043 SAE 80W-90 Heavy Duty Gear Oil - 1 Quart. dummy. Valvoline Flexfill SAE 75W-90 Full Synthetic Gear Oil 1 QT, Case of 4. dummy. Valvoline High Performance SAE 80W-90 Gear Oil 1 QT. Try again! Details . Added to Cart. spCSRF_Control. Add to Cart . Try again!1.9qts GL4 or GL5 75w90 Transfercase: 1.5qts Hypoid GL5 75w90 Front Diff: 1.5qts Hypoid GL5 SAE90 Rear Diff: 3.1qts Hypoid GL5 SAE90 ... Toyota changed the gear oil spec on the FJ's after the first couple of years calling out a 90 weight to a 75W-85 weight oil because some Canadian sold FJ's were grenading diff's and the move to a full ...El GL-5 tal vez reduce la cantidad de hierro, pero puede ver cuanto más suben las partículas de cobre. Aquí vemos un aviso de Nissan: Traducción: Precaución: Si el manual de servicio Nissan pide un aceite clasificado API GL-4, tiene que usar API GL-4. El GL-5 NO FUE hecho para reemplazar GL-4. NO USE GL-5.Gear Oil Industry Specifications - API. GL is short for " GEAR LUBRICANT". API has the following GL classifications: for Gear Oils -. GL-1: Oil without EP additive. GL-2: Usually contains fatty materials. GL-3: Contains a mild EP additive. GL-4: Equivalent to MIL-L-2105B and is usually satisfied by a 50% GL-5 additive level.10 posts · Joined 2011. #6 · Jun 9, 2011. Root cause found. Got word back from Suzuki, There is an E-ring that hold 5th in place. that failed and allowed the gear to float, and it then took out the synchronizer and input shaft. All covered under warranty. I found a service bulletin TSB-03-05059 about this.GL1, GL4, GL5 gear oil. I have researched this subject for the following reasons which I think many of you will agree with. First, GL-1 is unavailable in my area (I did find one source,@ $39 per 5gals.+$10 handling charge + 1 week wait,no thank you).Second, 134-D is too thin and too expensive too leak all over the place.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.Join Date: Dec 2000. Location: Norway / Merritt Island FL. Posts: 218. GL-5 is not better than GL-4, just different. In general terms, the higher the GL number the more EP, extreme pressure, additive the oil contains. The EP additive used to be sulphur based, hence the bad smell at high tempperatures.Newer lubricants provide improved gear protection. Any GL4 will do, but the newer lubricants have better gear protection and lubricity. I would suggest most any GL5 synthetic. If you have a bit of gear noise, try Redline's "Heavy ShockProof®" - film thickness greater than an SAE 75W250, yet low fluid friction like 75W90.Description. GL-1. Active. The designation API GL-1 denotes lubricants intended for manual transmissions operating under such mild conditions that straight petroleum or refined petroleum oil may be used satisfactorily. Oxidation and rust inhibitors, defoamers, and pour depressants may be added to improve the characteristics of these lubricants.Nissan has the same problem with 75W -90 oil, but their manual clearly states 75W -80 for 6 speed transmissions and 75W-85 for 5 speed transmissions. It does not spe cify "non sulfur/phosphorous" oil, instead referring to "Genuine Nissan Oil" (which does not contain those additives). VW calls for 75W oil that meets their spec.Oils are designed for specific tasks, they are not universal. ATF is designed so that clutches are lubricated but don't slip when engaged. GL4 or GL5 are designed to be as slippery as they can be to reduce sliding friction between the ring and pinion. The synchos are designed for the fluid required by the manufacturer.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.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.Jan 19, 2007 · 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.GL-4 is the only way to go with our cars." This is correct. Many GL-5 gear oils use a sulfur-based additive package which chemically etches itself onto the face of iron/steel gears and acts as an extreme-pressure agent to protect them from more serious wear. However Newer ones (Chevron Delo gear oil) use a non-corrosive boron-based … My Gen 1 spec'd it and after tons of reading and r