Bel-Ray Big Twin Transmission Oil </h2
Bel-Ray Big Twin Transmission Oil: Silence the Clunk
Bel-Ray V-Twin Big Twin Transmission Oil is engineered to outperform standard motor oils often used in V-Twin gearboxes. While many riders use 20W-50 in all three holes, a dedicated gear lubricant like Bel-Ray provides the specific extreme pressure (EP) additives required to protect the sliding gears and heavy-duty bearings found in Harley-Davidson® transmissions. This oil is designed to stay in grade, providing a persistent protective film that won’t thin out under the intense heat of long-distance touring.
Advanced Wear Protection and Noise Reduction
Transmissions in large V-Twins are subject to massive shock loads every time you drop into gear. Bel-Ray’s formula features shear-stable polymers and anti-wear agents that coat gear teeth, preventing metal-to-metal contact. This results in a noticeable reduction in mechanical noise and “gear howl.” Riders often find that after switching to Bel-Ray, the characteristic “clunk” when shifting into first gear is substantially dampened.
Optimized for Smooth, Precise Shifting
Finding neutral can be a chore with the wrong lubricant. Bel-Ray Big Twin Transmission Oil is designed to provide the perfect balance of lubricity and friction, allowing the shift dogs to engage smoothly without excessive resistance. Its high-viscosity index ensures that the oil remains thin enough for easy shifting when cold, yet thick enough to provide a robust protective barrier once the transmission reaches its peak operating temperature.
Oxidation Resistance and Cleanliness
Transmission oil lives in a punishing environment with limited airflow for cooling. Bel-Ray uses oxidation-resistant base stocks that prevent the formation of sludge and varnish on internal components. This ensures that your bearings remain clean and well-lubricated for the life of the service interval. The distinctive red color of the fluid also makes it easy to distinguish a transmission leak from primary or engine oil leaks.
Fitment and Application
Bel-Ray Big Twin Transmission Oil is recommended for:
- Harley-Davidson Big Twins: All 4, 5, and 6-speed transmissions (Evolution, Twin Cam, and Milwaukee-Eight).
- Aftermarket Transmissions: Suitable for use in Baker, RevTech, and S&S Cycle gearboxes.
- Specification: Meets or exceeds API GL-5 requirements.
- Note: Not for use in Sportster models or primary chaincases.
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Bel-Ray Big Twin Transmission Oil
Big Twin Transmission Oil is a multi-grade oil designed specifically for the high pressure and shearing forces unique to Big Twin transmissions. Its distinct red color makes leaks easy to identify in multiple lubrication cavity engines. Premium shear stable, high Viscosity Index base oils prevent lubricant viscosity breakdown caused by the stresses of Big Twin engines. All Bel Ray products are RoHS compliant and manufactured to a high standard right here in the USA.
Features
High-temperature protection, high-viscosity-index base oils maintain film strength over a wide temperature range
Special lubricity additives reduce sliding friction for exceptionally smooth and quiet shifting
Distinctive red color makes transmission leaks easy to detect
Resists viscosity breakdown caused by gear shearing action
Superior lubricity minimizes sliding friction for maximum power
Exclusive Bel-Ray extreme-pressure chemistry protects gear components from the destructive effects of shock loading
Superior oxidation protection prevents thermal oil degradation for extended performance
85W140 multi-grade transmission oil
Made in the USA
| Product Style | AmericanV-twin Item # | Catalog Number | Store Sku | MFR. Product # | Availability |
|---|---|---|---|---|---|
| 1 Liter | 9821 | 900-408 | 2926 | 96900-BT1 | In Stock: Ships within 24 hours |
