Cadillac CT6 2016-2017 Automatic Transmission 8-Speed 8L45 3.6L AWD Remanufactured

Bolt this remanufactured Cadillac CT6 8L45 AWD transmission directly behind your 3.6L LGX engine to eliminate harsh torque converter shudder. Engineered for 2016 to 2017 full-size Omega platform chassis, this eight-speed unit restores crisp all-wheel-drive ratio transitions. You must perform a heated cooler line flush and execute an electronic transmission adaptive relearn before conducting road verification tests.

Shot-peened A380 die-cast aluminum forms the longitudinal all-wheel-drive casing, inspected with fluorescent penetrant for hairline transfer case adapter cracks. Four planetary gear carriers transfer 335 horsepower without gear tooth spalling or spline wear. Rebuilders install updated Sonnax pressure regulator valve sleeves, Kolene salt-bath nitrided steel plates, and Raybestos GPZ friction discs. Precision stator support bushings prevent internal fluid leakage. The dry transmission weighs 185 lbs and ships inside a 36 by 24 by 22 inch crate.

Key Features of GM 8L45

Fleet mechanics buy GM 8L45 transmission units to stop low-speed converter clutch slip without paying steep dealership parts pricing. This commercial remanufactured transmission assembly provides positive ratio control for Cadillac CT6 transmission replacement projects.

- Re-machined pressure regulator valve bores stop hydraulic fluid leakage inside the main casting.
- CNC-machined valve body passages hold 22 inHg on precision vacuum test benches.
- Updated torque converter lockup clutch friction lining cures driveline shudder under cruise conditions.
- Balanced remanufactured torque converter eliminates vibration and shields front pump drive gears.
- Raybestos GPZ friction plates resist thermal glaze during sustained high-speed highway travel.
- Precision stator support bushings maintain steady hydraulic line pressure to forward clutch circuits.
- Pre-calibrated variable force solenoids deliver rapid 20 ms actuation across all eight gear steps.

SuperFlow Bench Dynamometer Telemetry Data

Technicians test every remanufactured 8L45 gearbox on an automated SuperFlow transmission dynamometer under full working temperatures. Pressure transducers verify main line pressure holding 185 PSI in Drive and 250 PSI in Reverse at 1600 RPM. Variable-bleed shift solenoids execute fluid routing within 20 ms under computerized diagnostic commands. Re-machined valve body channels sustain 22 inHg vacuum during static bench drawdown tests. Automated testing validates zero torque converter clutch slip at cruising speed. Fluid temperature sensors confirm stable thermal equilibrium at 175°F without internal bypass leaks.

Field Installation Directives Negative Filter

Push and rotate the torque converter inward until you verify three distinct clicks into the front pump drive lugs. Check engine alignment dowels for burrs prior to pulling the bellhousing flat against the block. Do not buy this factory unit for twin-turbo V-Sport track racers or custom swaps.

- Flush chassis radiator transmission cooler lines with heated solvent to clear trapped metal dust.
- Fill with approved Mobil 1 Synthetic LV ATF HP fluid at 40°C pan temperature.
- Execute a transmission adaptive fast learn sequence using a diagnostic scanner before driving.

Nationwide Warranty Freight Manifest Inclusions

This remanufactured assembly carries a nationwide 3-Year/100,000-Mile warranty covering mechanical breakages and hydraulic valve body control failures. The reinforced wooden crate contains a balanced torque converter, technician installation checklist, dynamometer test pass printout, cooler flush verification card, and a pre-paid core return freight bill for rapid transit.