Chevrolet Silverado GMC SierrA 1500 Remanufactured Manual Transmission

Description

A 4.02:1 first gear ratio, 300 lb-ft input torque threshold, and rigid one-piece aluminum case construction halt gear tooth separation across demanding municipal maintenance shifts and commercial fleet hauling. The Chevrolet Silverado GMC Sierra 1500 Remanufactured Manual Transmission provides crisp manual shift transitions across half-ton truck duty cycles. Rebuilt internals withstand continuous torque transfer without internal gear bind.

Die-cast A380 aluminum single-piece casing castings prevent housing deflection under high driveline twist. Multi-piece synchronizer packs feature carbon-lined friction cones that prevent gear clash between shifts. Case-hardened 8620 steel helical gear sets spin on premium cylindrical roller bearings to distribute tooth loads. An integrated bell housing eliminates external alignment runout, while two-piece case halves seal with chemical anaerobic flange sealant. Dry weight measures 110 lbs without fluid. Sump fluid capacity holds 2.1 quarts of manual lubricant.

Key Features of Chevrolet Silverado GMC Sierra 1500

Fleet operators buy Chevrolet Silverado GMC Sierra 1500 remanufactured manual transmission units to guarantee dependable uptime across regional utility service runs. Each remanufactured drivetrain component undergoes strict dyno spin testing to confirm synchronous shift quality.

• 4.02:1 first gear reduction produces solid starting power to move loaded utility service beds
• 0.73:1 fifth gear overdrive drops cruising engine revolutions to improve commercial fleet fuel economy
• Carbon-composite synchronizer friction faces dissipate heat fast to prevent high-rpm shift lock
• Single-rail internal shift architecture eliminates linkage binding across severe winter temperature swings
• Chevrolet Silverado GMC Sierra 1500 transmission gear clusters undergo shot-peening to boost core strength
• Precision-ground helical teeth minimize gear whine inside the driver compartment during highway transit
• Viton front input seals resist thermal degradation to prevent clutch disc oil contamination

Dynamic Mechanical Ratios Thermal Thresholds

Rated for 300 lb-ft continuous input torque at 3,200 RPM, this manual gearbox serves in municipal utility fleets and commercial light transport trucks. Internal gear step ratios span 4.02:1 first, 2.32:1 second, 1.40:1 third, 1.00:1 fourth, and 0.73:1 overdrive. Continuous operating oil temperatures hold steady between 160°F and 195°F. External aluminum case cooling ribs radiate heat straight to passing chassis air without requiring auxiliary oil cooling lines or external radiator heat exchangers.

Output Spline Driveline Geometry Standards

The mainshaft terminates in a 31-spline output shaft designed for slip yoke rear-wheel drive configurations. Companion flange runout measures under 0.0018 inches total indicator reading to eliminate driveshaft driveline drone. A 4-bolt rear mount pad anchors the tailhousing straight to the factory chassis crossmember isolator without binding.

Transmission Shifting Maintenance Operating Restrictions

Technicians must charge the dry casing with approved GM synchromesh manual fluid through the side fill plug. This manual transmission is not engineered for heavy fifth-wheel trailering exceeding factory gross ratings, truck snow plowing, or competitive drag racing events.

• Check hydraulic clutch master cylinder fluid levels each shift to prevent incomplete clutch release
• Inspect shifter tower rubber dust boots for tears every 250 hours of fleet operation
• Drain and refill manual transmission lubricant every 30,000 miles to preserve synchronizers

Fleet Warranty Crate Freight Manifest

Protected by a 3-Year / 100,000-Mile commercial fleet warranty, this unit ensures reliable operation. The secured wooden freight crate contains one remanufactured manual transmission, pre-tested shifter tower, dyno certification report sheet, and a vehicle-specific installation setup sheet.