4L65E 2007 Chevrolet Trailblazer 6.0L RWD – Remanufactured 4-Speed Automatic Trans

Description

Engineered for high-output sport trucks, this Chevy Trailblazer SS 2007 Remanufactured Transmission supports 395 horsepower alongside 400 lb-ft of torque at 6000 engine RPM. Configured for 2WD performance chassis layouts, the 4-Speed unit sustains mainline hydraulic pressure of 195 to 230 PSI during full throttle launches, providing positive clutch clamping without internal friction slippage.

Housed inside high-pressure die-cast A380 aluminum casing, the internal gear train features five-pinion planetary gearsets and shot-peened 8620 steel carriers. Hard-anodized valve bore sleeves eliminate internal cross-leaks, while an oversized regulator valve stabilizes line pressure under continuous acceleration. Equipped with 1/2-inch inverted flare ports, it weighs 162 lbs dry and requires 11.2 quarts of DEXRON-VI fluid with the 300mm torque converter.

Key Features of Chevy Trailblazer SS

Performance enthusiasts buy Chevy Trailblazer SS 2007 remanufactured transmission units to handle the intense output of 6.0L V8 powerplants across demanding street driving routes. Upgraded internal mechanical tolerances eliminate fluid leaks and restore responsive throttle performance.

• 4-Speed performance automatic transmission architecture features 3.06:1 1st gear ratio to generate blistering off-the-line launch acceleration
• 0.70:1 4th gear overdrive ratio reduces sustained engine RPM during long-distance highway transport runs
• Trailblazer SS 2007 replacement valve body incorporates recalibrated separator plates to prevent cross-channel fluid pressure drops
• Trailblazer SS 2007 torque converter package features furnace-brazed turbine blades to resist rotational distortion under heavy load
• Five-pinion planetary gearsets distribute gear tooth contact stress to eliminate catastrophic gearset fracturing
• Hardened reaction sun gear shells withstand sudden full throttle downshifts during high-speed highway passing maneuvers
• High-energy carbon-composite 2-4 brake bands prevent intermediate gear slip under heavy wide-open throttle acceleration cycles
• Reinforced forward clutch input drums eliminate splined hub fatigue under severe towing operational loads

High Output Mechanical Limits

Mainline fluid pressures maintain 195 to 230 PSI across forward gear ranges, holding fluid sump temperatures within 165°F to 190°F under aggressive driving conditions. Peak continuous input torque measures 400 lb-ft at 4400 RPM across 3.06:1 1st gear, 1.63:1 2nd gear, 1.00:1 3rd gear, and 0.70:1 4th gear. External radiator cooling loops bleed off friction heat to protect clutch linings.

Driveshaft Slip Yoke Tolerances

The 27-spline output shaft provides micro-polished journal surfaces for standard 2WD slip yoke installation. Transmission bellhousing pilot diameter measures 5.00 inches, and crossmember mounting pad distance sits 23.3 inches from the engine mating face. Output shaft radial runout stays under 0.0016 inches to prevent driveline shudder at high speeds.

Computer Controlled Dyno Protocol

Every gearbox runs through automated hot-fluid dynamometer cycles, tracking solenoid resistance, circuit pressures, and mechanical gear noise under road simulation. This transmission unit is not engineered for stripped competition drag racing, truck pulling exhibitions, or installations with contaminated cooler lines.

• Inspect transmission cooler circuit and test line resistance every 25,000 miles
• Drain bottom fluid sump and renew internal filter elements every 12 months
• Examine chassis transmission mount rubber bushings every 14 operating days

Standard Warranty Manifest Coverage

Coverage provides an extensive 3-Year unlimited mileage warranty for commercial fleet and private operations. Each heavy-duty wooden crate includes the complete remanufactured transmission, balanced lockup torque converter, inline fluid filter module, illustrated installation manual, and certified fluid specification tags.