Quicksilver V‑Twin Primary & Transmission Fluid 1 Quart — GL‑4, Shear‑Stable for Wet Diaphragm Clutches

Quicksilver 8M0175742 is a shear-stable, API GL-4 rated 1‑quart fluid formulated specifically for high-performance V‑twin motorcycle transmissions and primary chaincases.

Engineered for V‑twin setups with wet diaphragm spring clutches, this Quicksilver primary and transmission fluid helps maintain consistent clutch engagement, smoother gear changes, and reduced internal wear. The formulation focuses on shear stability so viscosity and protective properties remain effective under high load and temperature cycles typical of V‑twin riding. It comes in a convenient 1‑quart bottle and meets OEM warranty requirements when used as specified.

How does this fluid improve clutch engagement and shifting?

Quicksilver’s formula contains friction modifiers chosen to work with wet diaphragm spring clutches, keeping the clutch plates engaging predictably and minimizing chatter. By preserving the fluid’s viscosity during shear, the fluid maintains a stable film thickness between moving parts for smoother, crisper shifts.

• Friction characteristics tuned for wet diaphragm spring clutch systems
• Shear-stable additives help retain viscosity under heavy loads
• Reduces clutch slippage and inconsistent engagement
• Promotes consistent shift feel across temperature ranges

Will this fluid protect my transmission and chaincase from wear?

Yes — the product includes anti-wear additives formulated to reduce metal‑to‑metal contact inside transmissions and primary chaincases. Regular use can help slow wear on gears, shafts, and chain components by sustaining an effective lubricating film even under high torque and repeated shock loads.

• Anti-wear chemistry tailored for gear and chain protection
• Designed to extend life of primary chain and internal components
• Stable protection across a range of operating temperatures
• Meets API GL‑4 specifications for gear lubrication

Is this the right product for my motorcycle and warranty?

This Quicksilver fluid is intended for use in all V‑twin motorcycle transmissions and primary chaincases, especially those fitted with wet diaphragm spring clutches. It meets or exceeds manufacturer warranty requirements, and using it per your owner’s or service manual will not void warranty coverage.

• Suitable for most V‑twin transmission and primary chaincase applications
• Complies with OEM warranty specifications when applied correctly
• Packaged in a one‑quart bottle for easy service intervals
• Consult your motorcycle manual for application details and fill levels

How should I use and store this fluid for best results?

Use the fluid according to your motorcycle’s service schedule and fill specifications. Store the sealed bottle upright in a cool, dry place away from direct sunlight and extreme temperatures; always replace caps tightly after use to prevent contamination and moisture ingress.

• Follow manufacturer-recommended change intervals and capacities
• Keep bottle sealed when not in use to avoid contamination
• Dispose of used fluid responsibly at an approved recycling facility
• Use a clean funnel or pump to prevent debris entering the system

Who is this for? Riders, mechanics, and restoration specialists working on V‑twin motorcycles who want a purpose-built fluid for primary chaincases and transmissions will find this Quicksilver formulation appropriate. It’s especially useful for machines with wet diaphragm spring clutches where predictable friction performance and shear stability are important. If you maintain or rebuild V‑twin drivetrains and need a one‑quart service supply that meets API GL‑4 standards and OEM warranty requirements, this product is a practical choice.