Buick Rainier Chevy Envoy TrailBlazer GMC Envoy XL 2006-2007 Automatic Transmission 4-Speed 4L60E Remanufactured

Spool-valve line pressure modulation and reaction carrier planetary reduction deliver positive torque transfer under heavy towing demand. This remanufactured 4L60E sport-utility transmission 10167T provides direct replacement for 2006 to 2007 Buick Rainier, GMC Envoy XL, and Chevrolet TrailBlazer models. Technicians must flush cooler lines with heated solvent and reset computer shift adaptives before conducting highway validation tests.

Shot-peened A380 die-cast aluminum forms the longitudinal transmission casing, inspected through non-destructive dye penetrant for bellhousing stress fractures. Forged steel planetary carriers handle inline-six and V8 engine torque without gear deflection or spline wear. We install reinforced reaction sun shells, upgraded thirteen-vane pumps, Kolene steel plates, and high-energy Raybestos GPZ friction packs. Replaced pump stator bushings maintain constant line pressure. The dry transmission weighs 165 lbs and ships inside a 36 by 22 by 20 inch crate.

Key Features of GM 4L60E

Technicians buy GM 4L60E transmission units to eliminate harsh second gear shift clunks and 3-4 clutch failure without paying extreme dealer pricing. This commercial remanufactured transmission assembly provides refined gear changes and dependable torque delivery for your GMC Envoy XL transmission replacement project.

- Hardened reaction sun shell prevents spline strip failure under continuous heavy cargo towing.
- Upgraded Raybestos GPZ 3-4 clutch pack stops friction burn and third gear slip flare.
- Re-machined valve body passages hold twenty-two inches of mercury during calibrated vacuum tests.
- Dynamically balanced remanufactured torque converter stops driveline vibration and protects front pump bushings.
- High-output thirteen-vane oil pump rotor delivers steady hydraulic line pressure across all RPM ranges.
- Input speed sensor circuitry provides accurate rotational telemetry to the vehicle engine control module.
- Updated forward accumulator piston seals prevent hydraulic cross-bleed during wide-open throttle passing gear downshifts.

SuperFlow Dynamometer Diagnostic Telemetry Data

Technicians subject every remanufactured 4L60E gearbox to hot and cold testing cycles on a SuperFlow transmission dyno. Pressure gauges verify main hydraulic line pressures holding 190 PSI in Drive and 240 PSI in Reverse at 1600 RPM. Electronic shift solenoids switch circuits within twenty milliseconds without spool valve hang. Valve body circuits hold twenty inches of mercury vacuum on precision bench gauges. The test program validates zero torque converter clutch slip at cruising speed. Thermal imaging cameras confirm leak-free front pump and rear extension seals under load.

Field Installation Directives Negative Filter

Spin the torque converter inward through three positive gear drops until the converter clears the front bellhousing face. Check engine block dowels for corrosion before bolting the bellhousing flat. Do not buy this factory calibrated unit for supercharged builds, manual swaps, or track race chassis.

- Flush cooler lines with hot chemical solvent to clear burned friction clutch sediment.
- Fill with approved Dexron VI fluid through the dipstick tube at operating temperature.
- Clear transmission adaptation registers using diagnostic software before taking the vehicle on highways.

Nationwide Warranty Freight Crate Contents

Your purchase brings a nationwide 3-Year/100,000-Mile warranty protecting against internal mechanical damage and hydraulic pressure control faults. The sturdy wooden freight crate houses a balanced torque converter, technician installation guide, dynamometer inspection pass slip, cooler flush checklist, and a pre-printed core return bill of lading for simple return transit.