4L60E 2004-2006 Chevrolet/GMC Colorado/Canyon 3.5L RWD – Remanufactured 4-Speed Automatic Trans

Description

Built for midsize work trucks, Chevy Colorado 2005 Remanufactured Transmission provides 4-Speed automatic operation across 2WD chassis lines. Rated for 220 continuous horsepower and 225 lb-ft peak torque, the unit holds an engine limit of 5,800 RPM. Internal line pressure regulates from 65 PSI at idle to 215 PSI under load, maintaining firm clutch grip across commercial routes without slip.

Cast from high-pressure die-cast A380 aluminum alloy, this remanufactured unit contains carburized 8620 steel planetary gears paired with hardened reaction sun shells to counter torque stress. High-energy graphite friction plates and upgraded sprag clutches resist heat breakdown. The rebuilt valve body features hard-anodized aluminum bore sleeves and an updated pressure regulator valve. Fluid capacity equals 11.2 quarts Dexron VI with 1/4-inch cooling lines. Dry transmission weight equals 163 lbs with lockup torque converter.

Key Features of Chevy Colorado

Fleet directors choose to buy Chevy Colorado 2005 remanufactured transmission units to restore work truck productivity without unexpected service downtime. This 4-Speed automatic transmission powers 2WD midsize pickup trucks operating across municipal maintenance and commercial utility routes.

• 3.06:1 ratio 1st gear gearset provides strong mechanical torque amplification for steep grade launches
• 1.63:1 ratio 2nd gear band holds firm clutch holding force during brisk street acceleration
• 1.00:1 ratio 3rd gear direct clutch maintains positive drive lockup across regional work routes
• 0.70:1 ratio 4th gear overdrive hub lowers highway cruise engine RPM and thermal stress
• 2005 Colorado replacement valve body corrects delayed shifting via micro-honed hydraulic valve channels
• 298mm Colorado 2005 torque converter package features furnace-brazed turbine fins for elevated thermal endurance
• 2WD output shaft with 27 splines connects straight to factory driveshaft slip yokes

Rotational Torque Line Pressures

Operating line pressure reaches between 185 and 220 PSI during wide-open throttle maneuvers, preventing clutch plate burn. Sump fluid heat remains contained between 165°F and 195°F through high-flow internal hydraulic passages. Built to handle 225 lb-ft continuous input torque at 3,800 RPM, the gear set distributes force across 3.06:1, 1.63:1, 1.00:1, and 0.70:1 ratios. Fluid circulation through dual cooling ports prevents heat buildup inside the torque converter clutch, maintaining consistent shift friction behavior across harsh urban stop-and-go commercial routes.

Rear Yoke Alignment Tolerances

A precision-machined 27-spline output shaft interfaces with the stock 2WD slip yoke. The casing positions a 5.375-inch pilot register diameter for true crankshaft alignment. Total bushing runout measures below 0.0018 inches on dial indicators, preserving seal life. Measuring 28.5 inches from bell housing face to extension housing tail, this casing bolts straight to factory crossmember mount locations.

Chassis Dyno Diagnostic Procedures

Hydraulic dynamometer testing checks electronic solenoid cycle times, converter clutch lockup, and main line pressure response under simulated chassis loads across operating temperatures. Techs verify zero circuit restriction across cooling loops before crating. This transmission is not engineered for pro-mod drag racing, competition sled-pulling trucks running uncalibrated tuning, or drivelines with contaminated fluid coolers.

• Flush vehicle transmission cooler lines before unit install to eliminate metal debris recirculation
• Verify transmission fluid volume every 14 operating days using warm engine idle checks
• Replace transmission fluid and sump filter every 25,000 miles during severe commercial truck operation

Commercial Crate Protection Standards

Commercial coverage provides a 3-Year unlimited mileage warranty across commercial fleet and retail installations. Each heavy wooden shipping crate holds a remanufactured transmission, dyno-tested lockup torque converter, external fluid filter unit, setup guidelines, and fluid specification documentation. All components arrive ready for rapid vehicle installation across repair bays.