WebJul 23, 2002 · A GL5 fluid contains EP (extreme pressure) additves. These additives are corrosive to the soft metals in your tranny. Your tranny life with be reduced with the use of this type of gear oil. A GL3 fluid does not contain these additives....hence, it is soft metal "friendly." Your best bet is to use one of the following: WebOct 13, 2024 · GL-4, 5 are protection ratings. GL-5 gear lubes contain Extreme Pressure (EP) additives for highly-loaded, hypoid differentials, whereas GL-4 gear lubes for manual transmissions contain Anti-Wear (AW) additives. Synchro assemblies can be made of brass or of Composite materials. Last edited: Oct 11, 2024. A.
GL-4 Vs GL-5 - What Is Best Gear Oil For You? - Auto …
WebJul 14, 2024 · The main difference between GL-4 and GL-5 gear oils is in the level of extreme-pressure (EP) additives. EP additives effectively protect gears by providing a sacrificial layer on gear surfaces; these additives are essential for protecting gears operating under heavy loads and extreme temperatures. A typical GL-5 gear oil provides about … WebMay 20, 2009 · I have an Email from castrol dated July 27, 2007 about GL4 vs. GL5. This is an excerpt: "API GL-5 gear oil designates service of hypoid and other types of gears commonly found in rear axles. A GL-4 oil may be employed in certain manual transmissions. These differences are mainly distinguished by the level of active … set default location for downloads windows 10
GL4 vs GL5 gear oil - Maintenance/Repairs - Car Talk Community
WebDec 4, 2024 · GL stands for gear lubricant. The 4 and 5 in GL-4 and GL-5 refer to the viscosity of the oil. The higher the number, the thicker the oil. GL-4 is thinner than GL-5, … WebThe higher amount of EP additives in GL5 gear oil meets the requirements of these gears. A GL5 gear oil has about twice as much EP additive as a GL4, ensuring the greatest … WebJan 28, 2024 · 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 … set default icon view windows 10