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04-10-2021, 11:06 AM | #31 | |
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Location: Glendale, Arizona
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Re: Rear end Gear lube
Quote:
GL-5 has a higher EP (Extreme Pressure) rating than GL-4 and it offers a higher shock load protection when you have a high angle of gear contact. GL-4 gear oil, no matter the viscosity, has half of the sulfur/phosphorous additive that gives the shock load protection. Nevertheless, because of the different angle of gear contact and softer contact material, on a manual transmission, this same additive used on the GL-5 gear oil effects the syncros and other soft metal components by fretting the contact surface. |
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04-10-2021, 09:06 PM | #32 | |
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Join Date: May 2014
Location: E TN
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Re: Rear end Gear lube
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