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Primary case oil - for 1984-to-present V-Twin American motorcycle engines, Twin Cam, including Evolution, and aftermarket engines of similar design. Perform & protect - this product is for use in the primary chaincase with wet-diaphragm spring clutches.







Value pack of 20: don't spend more than you have to on overpriced oem parts - our value pack of 20 is an excellent value whether you’re a professional mechanic or simply someone who likes to do it yourself! Please Note: This product is produced by Mission Automotive Parts.
95 mm / 008 inch. Ideal replacement: mission automotive transmission crush washers / drain plug gaskets are a compatible replacement for your Honda OEM washer / gasket. We have no affiliation with or endorsement from any of the other manufacturers mentioned. Strict quality standards: our washers are designed and constructed to strict quality standards and made from high quality materials, ensuring proper fit with the drain plug and creating a tight seal.
1. Red Line
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Red Line 42804 V-Twin Transmission Oil with Shockproof, 2 Pack
#adRed Line #ad - Same fluid as the unique Heavy ShockProof Gear Oil. For all h-d trans including with Evolution engines, Twin Cam engines, and latest 6-speed Cruise Drive. This product dampens transmission noise reducing the notorious shifting clunk found in these gearboxes, dramatically reduces temperature, provides thicker oil films between gear teeth and resists throw-off.More information #ad
For all aftermarket versions like Baker, JIMS, S&S, etc.Brand | Red Line #ad |
Manufacturer | Red Line #ad |
Part Number | 42804-2PK |
Model | 13 |
More information #ad
2. Red Line
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Red Line 42904 V-Twin Primary Case Oil, Engine Oil 1 Quart Bottle
#adRed Line #ad - Perfect for motorcycles, ATVs, and Powersports. Friction balanced case oil - most synthetics are too slippery for clutch operation. No compromises.Primary case oil - for 1984-to-present V-Twin American motorcycle engines, Twin Cam, including Evolution, and aftermarket engines of similar design. Perform & protect - this product is for use in the primary chaincase with wet-diaphragm spring clutches.
More information #ad
Boosts vehicle performance - Improves clutch operation while reducing wear and temperature, providing a longer clutch lifespan. Why red line - established in 1979, Red Line Products perform & protect better than any on the market. Our v-twin primary case Oil is a balanced oil limiting slip and performing a smoother operation.Brand | Red Line #ad |
Manufacturer | Red Line #ad |
Height | 10 Inches |
Length | 16 Inches |
Weight | 1.7 Pounds |
Width | 12 Inches |
Part Number | 42904 |
Model | 42904 |
Warranty | Limited Manufacturer |
More information #ad
3. Maxima
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32 fl. oz., Maxima Racing Oils 40-01901 85w140 V-Twin Transmission/Gear Oil
#adMaxima #ad - High film strength gear oil provides excellent protection against shock loads, viscosity loss and wear. Ultra-clean detergents protect gears from wear, deposits and allow for trouble-free operation.More information #ad
Recommended for use in 4-, 5- and 6-speed high performance gear boxes. Maxima v-twin heavy-duty transmission & Gear Oil is a high-quality, mineral based motorcycle gear oil. Extreme pressure additives and surface active chemistry allow smooth shifting under peak loads and RPMs.Brand | Maxima #ad |
Manufacturer | Maxima Racing Oils #ad |
Height | 2 Inches |
Length | 9 Inches |
Weight | 0.2 pounds |
Width | 6 Inches |
Part Number | 40-01901 |
Model | 40-01901 |
More information #ad
4. Red Line
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Black Filter, Red Line 90226 Big Twin 20w50 Power Pack Oil Package with K&N High Performance Oil Filter Complete Kit
#adRed Line #ad - Sticker kit & Red Line Oil embroidered hat. 5 quarts of 20W50 Motorcycle Oil. 1 quart of v-twin Transmission Oil with ShockProof. Versatile funnel. 1 quart of primary chain Case Oil & 1 bottle of Fuel Injection Cleaner.More information #ad
Brand | Red Line #ad |
Manufacturer | Red Line #ad |
Height | 8.5 Inches |
Length | 16.6 Inches |
Weight | 16.1 Pounds |
Width | 9.29 Inches |
Part Number | 90226 |
More information #ad
5. Maxima
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Maxima Racing Oils 40-02901 80w90 V-Twin Transmission/Gear Oil, 32 fl. oz.
#adMaxima #ad - Maxima v-twin heavy-duty transmission & Gear Oil is a high-quality, mineral based motorcycle gear oil. Recommended for use in 4-, 5- and 6-speed high performance gear boxes. High film strength gear oil provides excellent protection against shock loads, viscosity loss and wear.More information #ad
Ultra-clean detergents protect gears from wear, deposits and allow for trouble-free operation. Extreme pressure additives and surface active chemistry allow smooth shifting under peak loads and RPMs.Brand | Maxima #ad |
Manufacturer | Maxima Racing Oils #ad |
Height | 9 Inches |
Length | 6 Inches |
Weight | 0.2 Pounds |
Width | 2.5 Inches |
Part Number | 40-02901 |
Model | 40-02901 |
More information #ad
6. Bel-Ray
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1L. 96925-BT1, Bel-Ray VTwin Sport Transmission Fluid
#adBel-Ray #ad - Distinctive red color makes it easier to detect leaks in multiple lubrication cavity engines. It offers superior lubricity for maximum power, resists oxidation and viscosity breakdown for extended performance.More information #ad
Prevents clutch slippage and chatter for consistent engagement. High quality lubricant specially formulated for the transmission and primary of Sportster motorcycles.Brand | Bel-Ray #ad |
Manufacturer | Bel-Ray #ad |
Height | 2.5 Inches |
Length | 8.5 Inches |
Weight | 0.88 Pounds |
Width | 5 Inches |
Part Number | 3603-0032 |
Model | 3603-0032 |
More information #ad
7. ACDelco
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1 gal, ACDelco GM Original Equipment 10-9395 Dexron VI Automatic Transmission Fluid
#adACDelco #ad - Provides consistent shift performance, even in extreme conditions. Backward compatible with previous Dexron automatic transmission fluids and can be used as a much-improved replacement for older vehicles/transmissions originally using previous Dexron fluids.More information #ad
Improved performance over previous Dexron fluids in: friction durability, viscosity stability, aeration and foam control, and oxidation resistance. Potential to enable improved fuel economy and longer transmission life. Provides for extended drain intervals.Brand | ACDelco #ad |
Manufacturer | ACDelco #ad |
Height | 5.5 Inches |
Length | 11.5 Inches |
Weight | 2.28 Pounds |
Width | 5.5 Inches |
Part Number | 10-9395 |
Model | 10-9395 |
Warranty | No Warranty |
More information #ad
8. Valvoline
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Valvoline Multi-Vehicle ATF Full Synthetic Automatic Transmission Fluid 1 GA
#adValvoline #ad - Engineered with a proprietary blend of base oils and advanced additives to provide better oil flow at low temperatures and greater film protection at higher temperatures. High-performance seal conditioners maintain and preserve the elasticity of seals to help prevent leaks in high mileage transmissions.More information #ad
Developed with anti-wear technology to help improve transmission durability. Formulated with full-synthetic base stocks and advanced additive technology to meet the challenging demands of automatic transmissions.Brand | Valvoline #ad |
Manufacturer | Valvoline #ad |
Height | 10.9 Inches |
Length | 8.2 Inches |
Weight | 0 Pounds |
Width | 4.48 Inches |
Part Number | 773775 |
Model | 773775 |
More information #ad
9. Mission Automotive
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20-Pack Transmission Fluid Drain Plug Crush Washer compatible with Honda Replacement for Part #90471-PX4-000 works with Accord Acura Civic Ridgeline Odyssey CRV CR-V Pilot Fit Element
#adMission Automotive #ad - Compatible with part Number 90471 PX4 000 . Our washers meet or exceed the quality of OEM gaskets. Wide compatibility: these washers are compatible with most honda models, civic 1993-2019, accord hybrid 2005-2019, crosstour 2010-2015, including accord 1990-2019, Del Sol 1993-1997, Fit 2007-2019, cRV 2011-2019, element 2003-2011, Fit EV 2013-2014.Value pack of 20: don't spend more than you have to on overpriced oem parts - our value pack of 20 is an excellent value whether you’re a professional mechanic or simply someone who likes to do it yourself! Please Note: This product is produced by Mission Automotive Parts.
More information #ad
Ideal for transmission fluid changes. Size: outside diameter: 25. 5 mm / 1 inch, inside diameter: 18 mm / 071 inch, Thickness: 1. 95 mm / 008 inch. Ideal replacement: mission automotive transmission crush washers / drain plug gaskets are a compatible replacement for your Honda OEM washer / gasket. We have no affiliation with or endorsement from any of the other manufacturers mentioned. Strict quality standards: our washers are designed and constructed to strict quality standards and made from high quality materials, ensuring proper fit with the drain plug and creating a tight seal.
Brand | Mission Automotive #ad |
Manufacturer | Mission Automotive Parts #ad |
Part Number | TransmissionWashersHonda |
More information #ad