An additional requirement of SAE J306 is shear stability, which is explained later in this document. Lubricants based on their high- and low-tem- perature viscosities. The SAE has developed a grading system, SAE J306, which categorizes gear Thin will not have sufficient load-carrying ability to meet the equipment requirements. There is no advantage to using a gear lube with a viscosity greater than that required by the application. Additionally, thicker gear lubes have higher internal resistance (intra-fluid friction) which causes Thicker gear lubricants also require moreĮnergy to circulate, which negatively impacts fuel economy. Thicker oils are more difficult to circulate, particularly in cold temperatures, and wear protection can be sacrificed. Using gear lube that is too thick, however, has disadvantages. The higher the viscosity of a lubricant, the greater the load it can carry. This is, in part, a function of viscosity. There is a point, however,Īt which heavy loads exceed the oil’s ability to separate parts and metal-to-metal contact occurs.
With no direct contact, wear is eliminated. Known as film strength, to keep moving parts from contacting each other. Lubricants are considered incompressible and under ideal conditions maintain a constant layer of protection, military standards are not applicable.Ī lubricant’s primary function is to reduce friction and wear, and its most important property is its viscosity Is a global standard used by oil companies in countries where U.S. An additional gear lube standard, SAE J2360, mirrors MIL-PRF-2105E and Seal compatibility to extreme-pressure axle lubricants. MIL-PRF-2105E combines the performance requirements of MIL-L-2105D,ĪPI GL-5 and all but one parameter of API MT-1, thereby adding improved oxidation stability, cop- per corrosion resistance and Which supersedes the previous specification, MIL-L-2105D.
The most current military specification is MIL-PRF-2105E, military has established separate gear lube specifications. API GL-6 is identified by Lucas, Red Line and Torco as a performance specification. Not all gear lubes meet API MT-1 performance standards.ĪPI GL-1, GL-2, GL-3 and GL-6 are inactive. Which is not provided by API GL-4 or GL-5. API MT-1 calls for a higher level of oxidation stability, copper corrosion resistance and seal compatibility,
#MOBIL 1 75W90 HARLEY TRANSMISSION MANUAL#
API MT-1 designates lubricants for non-synchromesh manual transmissionsĪnd transaxles. These gear lubes may be used in select manual transmis- sions and transaxles. The active API gear lubricant specifications are API GL-4, GL-5 and MT-1.ĪPI GL-4 designates the type of service characteristics of spiral bevel and hypoid gears in automotive axles operated under moderate speeds and loads. Gear lubricant specifications are established for minimum performance levels. Was added to Torco SGO Synthetic at the recommended levels to ensure equal testing.Įach gear lube tested is listed in the following chart along with the performance specifications identified on the respective bottles. Mopar limited-slip additive was added to Mopar Synthetic and Torco Type G limited-slip additive Therefore expected to contain appropriate limited- slip-type additives. The cross-section of gear lubricants tested includes those offered by original equipment manufacturers (OEMs), motor oil companies and specialty companies.Īll gear lubes, with the exception of Mopar Synthetic and Torco SGO Synthetic, are recommended by their manufacturers for limited-slip differentials and are We reviewed the following 75w90 gear oils. Equipment runsīetter and lasts longer with AMSOIL SEVERE GEAR Synthetic EP Inhibit rapid lubricant degradation and component damage. ByĬontrolling thermal runaway, AMSOIL SEVERE GEAR Synthetic EP Lubricants Runaway a phenomenon caused by a lubricant's inability toĬontrol friction and increased heat under high-stress conditions. AMSOIL SEVERE GEAR lubricants help prevent Thermal Gear surfaces, providing the ultimate line of defense against wear, The proprietary AMSOIL additives form an iron-sulfide barrier coating on Viscosity for long-lasting protection against metal-to-metal contact. AMSOIL SEVERE GEAR Synthetic EP Lubricants maintain their Stable synthetic base oils and an extra treatment of high-performanceĪdditives. These state-of-the-artĪMSOIL formulations feature an exclusive blend of high viscosity, shear Maximum performance in severe duty applications. Premium grade gear oils specifically engineered for SVG is an extreme pressure ( EP) synthetic 75W90 gear oil.ĪMSOIL SEVERE GEAR Synthetic Extreme Pressure (EP)
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