Gear oil
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Joined: Aug 2008
Posts: 93
Likes: 2
From: Bothell ,WA
Just did 1k service and I brought them (dealer) the red line power pack. You will notice how easy it is to find neutral after the change. you will 1.3 quarts for m-8 107,
need to buy extra quart for trans
need to buy extra quart for trans
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Intermediate
Joined: Apr 2016
Posts: 31
Likes: 13
From: Delaware
Thanks, i ran the 75 w 90 in the trans of my 2010 ultra and 07 fatboy and it seemed to smooth it out and quiet it down. Just wondering if there was anything different with these newer bikes.
Ultimate HDF Member
Joined: Dec 2006
Posts: 8,961
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From: Conroe Texas
Road Warrior
Joined: Mar 2012
Posts: 1,522
Likes: 350
From: Holly Springs, North Carolina
Just so y'all know......75W 90 gear oil is not thicker than 20W/50 motor oil. It may be even a little thinner.
Last edited by BigDawgQC; Oct 5, 2018 at 07:40 AM.
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Ultimate HDF Member
Joined: Dec 2006
Posts: 8,961
Likes: 263
From: Conroe Texas
performs a different function , here is more info
https://www.amsoil.com/newsstand/aut...-the-gear-oil/
Motor oil contains additives such as detergents and dispersants to combat byproduct chemicals from gasoline or diesel ignition. Because an internal combustion engine has an oil pump and lubricates the bearings with a hydrodynamic film, extreme-pressure additives such as those used in gear oils are not necessary.
Motor oils and gear oils both have anti-wear additives, and they both must lubricate, cool and protect components, but gear oils may be placed under extreme amounts of pressure, creating a propensity for boundary lubrication, a condition in which a full-fluid lubricating film is not present between two rubbing surfaces. For example, differentials in cars and trucks have a ring-and-pinion hypoid gear set. A hypoid gear set can experience boundary lubrication, pressures and sliding action that can wipe most of the lubricant off the gears. To combat this extreme environment, extreme-pressure additives are incorporated into the oil. AMSOIL synthetic gear oils are formulated with an extra treatment of extreme-pressure additives in order to reduce wear and extend gear and bearing life.
https://www.amsoil.com/newsstand/aut...-the-gear-oil/
Gear Oil and Motor Oil Are Not the Same
Gear oil differs from motor oil. While many motorists may assume SAE 90 gear oil is thicker than SAE 40 or 50 motor oil, they are actually the same viscosity; the difference is in the additives.Motor oil contains additives such as detergents and dispersants to combat byproduct chemicals from gasoline or diesel ignition. Because an internal combustion engine has an oil pump and lubricates the bearings with a hydrodynamic film, extreme-pressure additives such as those used in gear oils are not necessary.
Motor oils and gear oils both have anti-wear additives, and they both must lubricate, cool and protect components, but gear oils may be placed under extreme amounts of pressure, creating a propensity for boundary lubrication, a condition in which a full-fluid lubricating film is not present between two rubbing surfaces. For example, differentials in cars and trucks have a ring-and-pinion hypoid gear set. A hypoid gear set can experience boundary lubrication, pressures and sliding action that can wipe most of the lubricant off the gears. To combat this extreme environment, extreme-pressure additives are incorporated into the oil. AMSOIL synthetic gear oils are formulated with an extra treatment of extreme-pressure additives in order to reduce wear and extend gear and bearing life.
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