Cadillac ATS CTS 2018 Automatic Transmission 8-Speed 8L45 2.0L AWD Remanufactured

Strict OEM remanufacturing engineering standards restore eight-speed drivetrain integrity to your all-wheel-drive Cadillac. This remanufactured GM 8L45 AWD transmission 12740T matches 2018 ATS and CTS models with 2.0L LTG turbo engines. Technicians must perform a chemical cooler line flush and clear transmission shift adaptations before putting the vehicle into road service to protect internal hydraulic controls.

Shot-peened A380 die-cast aluminum forms the all-wheel-drive transmission casing, inspected for stress cracks along mounting bosses using fluorescent dye penetrant. Hardened planetary pinions handle continuous 2.0L turbo engine torque without tooth deflection. Rebuilders install oversized pressure regulator valves, Sonnax TCC regulator sleeves, Kolene steel plates, and Raybestos GPZ friction packs. Replaced pump bushings maintain stable line pressure. The dry unit weighs 185 lbs and ships inside a 36 by 24 by 22 inch crate.

Key Features of GM 8L45

Technicians buy GM 8L45 transmissions to stop harsh shift clunks and converter shudder without paying steep local dealership pricing. This commercial remanufactured transmission assembly ensures positive torque multiplication and durable line pressure control for Cadillac ATS transmission replacement projects.

- Oversized pressure regulator valve prevents line pressure instability and harsh second gear shifts.
- Upgraded TCC regulator valve sleeve stops torque converter shudder and clutch slip codes.
- Vacuum testing proves 22 inHg retention across all reamed valve bores.
- Balanced torque converter stops drivetrain shudder while protecting internal pump gears from wear.
- Raybestos GPZ high-energy frictions resist high heat glaze during demanding highway driving.
- Hardened transfer case splines prevent tooth strip failure under full throttle acceleration.
- New solenoid pack guarantees factory 20 ms line pressure modulation in all forward gears.

SuperFlow Dynamometer Load Test Telemetry

Technicians test every remanufactured 8L45 transmission on a SuperFlow dynamometer through cold start and high temperature cycles. Telemetry confirms main line pressure reading 185 PSI in Drive and 250 PSI in Reverse at 1600 RPM. Electronic pressure control solenoids react within 20 ms with zero mechanical spool sticking. Calibrated vacuum gauges register 22 inHg across all hydraulic control passages. Automated testing logs zero lockup clutch slip under simulated high-load road conditions. Fluid temperature sensors confirm normal thermal equilibrium without internal fluid bypass leaks.

Field Assembly Rules Application Limits

Seat the torque converter inward with three distinct clicks until the hub drops well past the bellhousing mating surface. Never force the transmission against the engine block using bellhousing bolts. Do not buy this factory-calibrated unit for turbo track racers, drift builds, or vehicles with altered final-drive differentials.

- Flush cooler lines with hot pressurized solvent to clear metallic clutch debris from previous failures.
- Fill with approved Mobil 1 Synthetic LV ATF HP fluid at 40°C pan temperature.
- Perform an electronic adaptation reset procedure using a professional scan tool before road testing.

Warranty Terms Shipping Contents Details

This remanufactured assembly includes a nationwide 3-Year/100,000-Mile warranty covering mechanical breakages and hydraulic valve body failures. The reinforced wooden crate contains a balanced torque converter, step-by-step installation instructions, dynamometer test pass printout, cooler flush verification card, and a pre-paid core return freight bill for easy transport.