ACDelco Synchromesh Transmission Fluid for GM NV1500 — 32 oz (1 qt), Friction-Modified Synthetic, Synchronizer Protection

ACDelco 10-4014 Synchromesh Transmission Fluid is a friction-modified synthetic blend specifically engineered for GM New Venture NV1500 manual gearboxes to improve synchronizer action and protect internal components.

This ACDelco GM Original Equipment 10-4014 synchromesh fluid is a vehicle-specific manual transmission oil supplied in a 32-ounce (1 qt) white bottle. Formulated as a friction-modified synthetic blend, it targets the lubrication and friction requirements of certain GM manual transmissions — notably the New Venture NV1500 — helping maintain smooth gear shifts while limiting deposit formation and wear across a broad temperature range.

What does this fluid do inside a manual transmission?

It provides lubrication between gears and synchronizers while managing friction levels so synchronizers engage consistently. The blend resists sludge and varnish, helps prevent surface damage like pitting, and preserves metal parts under thermal stress.

• Specifically tuned friction modifiers for synchronizer performance
• Reduces formation of sludge and varnish
• Protects against spalling, corrosion, and general wear
• Works across -40°F to 300°F (-40°C to 149°C)

Which vehicles and gearboxes is this compatible with?

ACDelco 10-4014 is intended for GM manual transmissions that require the New Venture NV1500 specification. Always verify compatibility with your vehicle’s service manual before use.

• Designed for New Venture NV1500 manual transmissions
• Common fits: 1996–2003 GMC Sonoma and 1996–2003 Chevrolet S10
• Check the OEM service manual for exact model-year application
• Not a universal manual transmission fluid — use only where specified

How does it perform in extreme temperatures and heavy use?

The synthetic blend formulation maintains viscosity and protective films across a wide temperature span, helping keep synchronizers and gears lubricated during cold starts and high-heat operation. Its stability under heat reduces the risk of breakdown that can lead to deposit buildup.

• Fluid remains stable from -40°F to 300°F
• High thermal stability limits oxidation and degradation
• Friction control reduces wear during stop-and-go and towing conditions
• Helps ensure consistent shifting in varied climates

How should this product be used and stored?

Use ACDelco 10-4014 only where NV1500-compatible fluid is specified. Replace fluid per the vehicle manufacturer’s interval and handle the product per standard automotive fluid guidelines to avoid contamination.

• Drain and fill according to GM service manual instructions
• Store sealed in a cool, dry place away from direct sunlight
• Avoid mixing with incompatible manual transmission fluids
• Dispose of used fluid responsibly at an authorized recycling center

Who is this for: This ACDelco synchromesh transmission fluid is ideal for owners and technicians of GM light-duty trucks and compact pickups that specify the New Venture NV1500 gearbox — for example, Chevrolet S10 and GMC Sonoma models from the late 1990s to early 2000s. It suits anyone seeking an OEM-grade, friction-modified synthetic blend to preserve synchronizer performance, reduce deposit buildup, and protect transmission internals across a wide operating temperature range. Always consult the vehicle’s service manual to confirm this is the correct fluid for your application.