Transmission Oil
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Bel Ray - Big Twin Transmission Oil 1L
Bel Ray
$16.99Formulated for motorcycles with separate transmissions and or final drives Wear protection extends gear life Quiets gear whine and improves shifting For Big Twin, air cooled / liquid cooled transmissions and final drives API...$16.99 -
Red Line - V-Twin Transmission OIl W/Shockproof 1QT
Red Line
$25.49This 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 For all aftermarket versions like Baker,...$25.49 -
Red Line - Gear Oil W/Shockproof 80W 1QT
$24.99Popular for Sportster V-Twin transmissions ShockProof® features microscopic solid medium to provide cushioning between gear teeth, while maintaining lower drag Provides consistent shifting and wet-clutch operation$24.99 -
Bel-Ray - 96925-BT1 - Sport Transmission Fluid - 1L
Bel Ray
$15.99Bel-Ray - 96925-BT1 - Sport Transmission Fluid - 1L Features MSDS Migration Data Formulated for Harley Davidson Sportster® transmissions & primary gearboxes Extreme pressure additives to reduce component wear Prevents clutch slipping and...$15.99 -
Maxima Racing Oil - 40-02901 - V-Twin Transmission Oil - 80W-90 - 1 U.S. quart
Maxima
$16.99Maxima Racing Oil - 40-02901 - V-Twin Transmission Oil - 80W-90 - 1 U.S. quartFeaturesMSDS Migration DataFormulated specifically for H-D transmissions or V-Twin models without wet-clutchesHigh film strength gear oil for Big Twins provides excellent...$16.99 -
Maxima - 44901 - Hypoid Synthetic Gear Oil 75W90 1L
Maxima
$25.99Maxima - 44901 - Hypoid Synthetic Gear Oil 75W90 1LFeaturesGlobal Trade Item Number: 851211006417Full synthetic, ester-based gear oil 75W-90Formulated specifically for use in motorcycles and ATVsExcellent in BMW® and Harley-Davidson® applicationsSuperior...$25.99 -
Maxima - 40-01901 - V-Twin Transmission Oil 85W140 32Oz
Maxima
$18.99Maxima - 40-01901 - V-Twin Transmission Oil 85W140 32OzFeaturesGlobal Trade Item Number: 851211003218Heavy duty formula offers extended performance in severe operating conditionsUltra high film strength gear oil provides excellent protection against...$18.99 -
Maxima - 40-02901 - V-Twin Transmission Oil 80W90 32Oz
Maxima
$16.99Maxima - 40-02901 - V-Twin Transmission Oil 80W90 32OzFeaturesGlobal Trade Item Number: 851211003249Mineral-based gear oilFormulated specifically for for use in 4-, 5- and 6-speed Harley-Davidson® transmissions or V-Twin models without...$16.99 -
Bel-Ray - 99250-B1LW - Gear Saver Trans Oil 80W 1L (12/Case Sold Ea)
Bel Ray
$15.99Bel-Ray - 99250-B1LW - Gear Saver Trans Oil 80W 1L (12/Case Sold Ea)FeaturesGlobal Trade Item Number: 690509200423Formulated to protect transmission gears from wearPositive clutch engagement for better starts and longer clutch lifeProtects shafts,...$15.99 -
Bel-Ray - 99240-B1LW - Gear Saver Transn Oil 75W 1L (12/Case Sold Ea)
Bel Ray
$15.99Bel-Ray - 99240-B1LW - Gear Saver Transn Oil 75W 1L (12/Case Sold Ea)FeaturesGlobal Trade Item Number: 690509200416Formulated to protect transmission gears from wearPositive clutch engagement for better starts and longer clutch lifeProtects shafts,...$15.99 -
Bel-Ray - 99510-B1LW - Thumper Gear Saver Trans Oil 1L (12/Case Sold Ea)
Bel Ray
$15.99Bel-Ray - 99510-B1LW - Thumper Gear Saver Trans Oil 1L (12/Case Sold Ea)FeaturesGlobal Trade Item Number: 690509200768Formulated for motorcycle racing transmissionsMaximum clutch performance and smooth shiftingWear protection extends clutch lifeFor...$15.99 -
Bel-Ray - 99234-B1LW - Gear Saver Hypoid Oil 85W140 1L (12/Case Sold Ea)
Bel Ray
$16.99Bel-Ray - 99234-B1LW - Gear Saver Hypoid Oil 85W140 1L (12/Case Sold Ea)FeaturesGlobal Trade Item Number: 690509200850Formulated for separate transmissions and final drive unitsSmoother shifting and reduced gear whineExtreme Pressure additives reduce...$16.99 -
Bel-Ray - 99230-B1LW - Gear Saver Hypoid Oil 80W90 1L (12/Case Sold Ea)
Bel Ray
$16.99Bel-Ray - 99230-B1LW - Gear Saver Hypoid Oil 80W90 1L (12/Case Sold Ea)FeaturesGlobal Trade Item Number: 690509200409Formulated for separate transmissions and final drive unitsSmoother shifting and reduced gear whineExtreme Pressure additives reduce...$16.99 -
Bel-Ray - 96925-BT1 - Sport Transmission Fluid 1L (12/Case Sold Ea)
Bel Ray
$15.99Bel-Ray - 96925-BT1 - Sport Transmission Fluid 1L (12/Case Sold Ea)FeaturesGlobal Trade Item Number: 690509401394Formulated for the transmission and primary of Sportster® motorcyclesWear protection extends transmission lifePrevents clutch slipping and...$15.99 -
Bel-Ray - 96900-BT1 - Big Twin Transmission Oil 1L (12/Case Sold Ea)
Bel Ray
$16.99Bel-Ray - 96900-BT1 - Big Twin Transmission Oil 1L (12/Case Sold Ea)FeaturesGlobal Trade Item Number: 690509401318Formulated for motorcycles with separate transmissions and or final drivesWear protection extends gear lifeQuiets gear whine and improves...$16.99 -
Klotz - KH-GL140 - American V-Twin Trans Lube 75W140 32 Fl Oz
KLOTZ
$22.95Klotz - KH-GL140 - American V-Twin Trans Lube 75W140 32 Fl OzFeaturesGlobal Trade Item Number: 028175011102Certified warranty compliantCustom formulated for the Harley-Davidson Big Twin modelsSmoother and quieter shiftingReduced driveline...$22.95 -
Klotz - KH-GL90 - American V-Twin Trans Lube 80W90 32 Fl Oz
KLOTZ
$21.95Klotz - KH-GL90 - American V-Twin Trans Lube 80W90 32 Fl OzFeaturesGlobal Trade Item Number: 028175015902Certified warranty compliantCustom formulated for the Harley-Davidson Big Twin modelsSmoother and quieter shiftingReduced driveline frictionProvides...$21.95 -
Torco - T737590CE - V-Series Trans Lube 75W90 1L
TORCO
$20.99Torco - T737590CE - V-Series Trans Lube 75W90 1LFeaturesGlobal Trade Item Number: 789778737591V-Series Trans Lube is a selective blend of synthetic and petroleum-based oils designed to protect all gear face surfaces and bearing compoundsRace-proven...$20.99 -
Vp Racing - 2037 - Atf Pro 8 Oz (9/Case Sold Ea)
VP RACING
$19.64Vp Racing - 2037 - Atf Pro 8 Oz (9/Case Sold Ea)FeaturesGlobal Trade Item Number: 846781005892Reduces transmission temperature by up to 40FRestores performance to older and high mileage vehiclesDoubles ATF change intervalsFor standard, heavy duty,...$19.64 -
Lucas - 10043 - Heavy Duty Gear Oil 80W90 1 Qt (12/Case Sold Ea)
Lucas
$12.99Lucas - 10043 - Heavy Duty Gear Oil 80W90 1 Qt (12/Case Sold Ea)FeaturesGlobal Trade Item Number: 049807100438Designed for racersContains special anti-wear and lubricity agentsHelps control heatExcellent for high performance and heavy-duty applications$12.99 -
Lucas - 10042 - Heavy Duty Gear Oil 85W140 1 Qt (12/Case Sold Ea)
Lucas
$13.99Lucas - 10042 - Heavy Duty Gear Oil 85W140 1 Qt (12/Case Sold Ea)FeaturesGlobal Trade Item Number: 049807100421Designed for racersContains special anti-wear and lubricity agentsHelps control heatExcellent for high performance and heavy-duty applications$13.99 -
Lucas - 10047 - Synthetic Gear Oil 75W90 1 Qt (12/Case Sold Ea)
Lucas
$20.99Lucas - 10047 - Synthetic Gear Oil 75W90 1 Qt (12/Case Sold Ea)FeaturesGlobal Trade Item Number: 049807100476Designed to cushion gears and resist "squeezing out"formulated for high performance and heavy duty applicationsWithstands high temperaturesSuper...$20.99 -
Lucas - 10301-30 - X-Tra Hd Grease Cartridge 14.5 Oz (30/Case Sold Ea)
Lucas
$9.49Lucas - 10301-30 - X-Tra Hd Grease Cartridge 14.5 Oz (30/Case Sold Ea)FeaturesGlobal Trade Item Number: 049807103019Last four times longer than regular greaseVirtually waterproofAll temperature stableExceeds Lube for life specificationsThe ultimate...$9.49 -
Lucas - 10574 - Red 'N' Tacky #2 Grease Tub 1Lb (12/Case Sold Ea)
Lucas
$10.49Lucas - 10574 - Red 'N' Tacky #2 Grease Tub 1Lb (12/Case Sold Ea)FeaturesGlobal Trade Item Number: 049807105747Formulated with rust and oxidation inhibitorsWater resistantMaintains excellent mechanical stabilityLong storage lifeFortified with Anti-Seize...$10.49 -
Lucas - 10005-30 - Red 'N' Tacky #2 Grease Cart. 14.5 Oz (30/Case Sold Ea)
Lucas
$8.49Lucas - 10005-30 - Red 'N' Tacky #2 Grease Cart. 14.5 Oz (30/Case Sold Ea)FeaturesGlobal Trade Item Number: 049807100056Formulated with rust and oxidation inhibitorsWater resistantMaintains excellent mechanical stabilityLong storage lifeFortified with...$8.49 -
Harddrive - 198504 - Transmission Oil 80W90 1 Qt (12/Case Sold Ea)
HardDrive
$14.67Harddrive - 198504 - Transmission Oil 80W90 1 Qt (12/Case Sold Ea)FeaturesGlobal Trade Item Number: 191361119484Developed for use in 4, 5 and 6 Speed Harley Davidson transmissionsBlended for ultra high film strength offering excellent wear protection...$14.67 -
Harddrive - 198295 - Syn Transmission Oil 80W140 1 Qt (12/Case Sold Ea)
HardDrive
$22.10Harddrive - 198295 - Syn Transmission Oil 80W140 1 Qt (12/Case Sold Ea)FeaturesGlobal Trade Item Number: 191361239267Developed for use in 4, 5 and 6 Speed Harley Davidson transmissionsBlended for ultra high film strength offering excellent wear...$22.10 -
V-Twin - 41-0993 - Motorshop Ready Transmission/Primary Lube
Motorshop
$65.80V-Twin - 41-0993 - Motorshop Ready Transmission/Primary LubeDescriptionMotorshop ready transmission/primary formulated lube is a synthetic blend lube to provide excellent lubricity for the anti-wear requirements of transmission gears and primary...$65.80 -
V-Twin - 41-0199 - 85W90 Spectro Hypoid Transmission Gear Lube
Spectro Oils
MSRP: $24.69$23.08V-Twin - 41-0199 - 85W90 Spectro Hypoid Transmission Gear LubeDescription85W-90 hypoid transmission gear lube - Ground Ship Only Fits:AllAdditional Information UOM1 - EA ManufacturerSpectro Oils OriginUSAMSRP: $24.69$23.08 -
V-Twin - 41-0193 - Spectro Full Synthetic 6 Speed 75W/140 Transmission Lube
Spectro Oils
MSRP: $349.86$336.57V-Twin - 41-0193 - Spectro Full Synthetic 6 Speed 75W/140 Transmission LubeDescriptionSpectro Heavy Duty Platinum Spectro Full Synthetic 6 Speed 75W/140 Transmission Lube carries a GL5 designation.Sold as a case of 12 quart bottles. Fits:AllAdditional...MSRP: $349.86$336.57 -
V-Twin - 41-0186 - 85W-140 Spectro Transmission Oil
Spectro Oils
MSRP: $221.39$209.20V-Twin - 41-0186 - 85W-140 Spectro Transmission OilDescription85W-140 Transmission oil - Ground Ship Only Fits:AllAdditional Information UOM12 - CS ManufacturerSpectro Oils OriginUSA 2025 Catalog Pages1272MSRP: $221.39$209.20 -
V-Twin - 41-0162 - OE Semi-Synthetic Transmission Oil
OE
MSRP: $23.86$20.28V-Twin - 41-0162 - OE Semi-Synthetic Transmission OilDescriptionFor those who want nothing but OEM. V-Twin offers OE HD Semi-Synthetic Transmission Lube. Comes in a 32 ounce bottle.This special multiviscosity gear lubricant is for use in all 4 and...MSRP: $23.86$20.28 -
V-Twin - 41-0160 - 75W-140 Synthetic Transmission Oil, GL-1
Spectro Oils
$55.43V-Twin - 41-0160 - 75W-140 Synthetic Transmission Oil, GL-1Description75-140W Spectro synthetic transmission oil, GL-1 comes in a 32 ounce bottle. Fits:All modelsAdditional Information UOM1 - EA ManufacturerSpectro Oils OriginUSA 2025 Catalog...$55.43 -
Maxima Racing Oil - 40-01901 - V-Twin Transmission Oil - 85W-140 - 1 U.S. quart
Maxima
$18.99Maxima Racing Oil - 40-01901 - V-Twin Transmission Oil - 85W-140 - 1 U.S. quartFeaturesMSDS Migration DataHeavy-duty formula for Big Twins offers extended performance in severe operating conditionsUltra-high film strength gear oil provides excellent...$18.99 -
Klotz Oil - KH-GL90 - Big Twin Synthetic Transmission Lube - 80W-90 - 1 U.S. quart
Klotz Oil
$21.95Klotz Oil - KH-GL90 - Big Twin Synthetic Transmission Lube - 80W-90 - 1 U.S. quartFeaturesMSDS Migration DataCustom-formulated to meet or exceed warranty requirements for H-D Big Twin modelsTechniPlate technology reduces friction, absorbs gear shock...$21.95 -
Klotz Oil - KH-GL140 - Big Twin Synthetic Transmission Lube - 75W-140 - 1 U.S. quart
Klotz Oil
$22.95Klotz Oil - KH-GL140 - Big Twin Synthetic Transmission Lube - 75W-140 - 1 U.S. quartFeaturesMSDS Migration DataCustom-formulated to meet or exceed warranty requirements for H-D Big Twin modelsTechniPlate technology reduces friction, absorbs gear shock...$22.95 -
Bel-Ray - 99250-B1LW - Gear Saver Transmission Oil - 80wt - 1L
Bel Ray
$15.99Bel-Ray - 99250-B1LW - Gear Saver Transmission Oil - 80wt - 1L Features OE reference MSDS Migration Data Formulated to protect transmission gears from wear Positive clutch engagement for better starts and longer clutch life For 2T/4T...$15.99 -
Bel-Ray - 99234-B1LW - Hypoid Gear Oil - 85W-140 - 1L
Bel Ray
$16.99Bel-Ray - 99234-B1LW - Hypoid Gear Oil - 85W-140 - 1L Features MSDS Migration Data Formulated for gearboxes and final drive units without a wet clutch Smooth shifting and reduced gear whine Extreme Pressure additives reduce component wear For...$16.99 -
Castrol Classic - Gear SAE 90 Oil
Castrol
MSRP: $51.55$50.10Castrol Classic - Gear SAE 90 Oil Castrol Classic 90W is a monograde oil for straight cut gears, gearboxes and differentials where a non low EP gear oil is specified. Designated as API GL-3. Sold as 1 liter. Fitment: All modelsMSRP: $51.55$50.10 -
Out of stock
Torco - T300160ZE - Multi-Pur Waterproof Grease 8Oz
TORCO
$9.99Torco - T300160ZE - Multi-Pur Waterproof Grease 8OzFeaturesGlobal Trade Item Number: 789778201603Lithium complex technologyFor bearings, linkages and sealsProtects against rust and oxidationResists high shock loads and heatButtery smooth and easy to apply$9.99
Harley Transmission Oil
Smooth shifting starts with the right transmission oil. At Deadbeat Customs, we carry high-performance transmission fluids formulated specifically for Harley-Davidson gearboxes. These oils reduce wear on gears and bearings, quiet down the drivetrain, and hold strong under high heat and heavy loads. Choose from trusted brands such as Maxima, Klotz, Red Line, Bel-Ray, Drag Specialties, and Spectro to keep your Harley shifting clean and running cool. Regular fluid changes go a long way in protecting your transmission and keeping every gear change smooth and precise.