Cadillac ATS CTS 2016-2017 Automatic Transmission 8-Speed 8L45 2.0L RWD Remanufactured

Does harsh 1-2 shift clunk and converter slip shudder compromise your luxury Cadillac sedan? Fix that transmission slipping with this remanufactured GM 8L45 RWD transmission 12720T built for 2016 to 2017 ATS and CTS 2.0L turbo models. Technicians must perform a heated cooler line flush and clear shift adaptives prior to initial road testing.

High-density A380 die-cast aluminum forms the longitudinal casing, inspected for hairline stress fractures along mounting bosses using non-destructive dye testing. Hardened steel planet gears and high-strength reaction carriers handle 2.0L turbo torque without tooth pitting. We install Sonnax boost valve kits, upgraded TCC regulator valves, Kolene steel plates, and Raybestos GPZ friction packs. Replaced pump bushings preserve continuous fluid pressure. The dry unit weighs 178 lbs and ships inside a 36 by 24 by 22 inch crate.

Key Features of GM 8L45

Independent repair shops buy GM 8L45 transmission assemblies to resolve converter shudder and harsh gear changes without paying inflated dealer pricing. This commercial remanufactured transmission assembly provides smooth ratio stepping for Cadillac CTS transmission replacement projects.

- Upgraded Sonnax TCC regulator sleeve fixes torque converter shudder and lockup clutch slippage.
- Re-machined pressure regulator valve bore stops line pressure decay inside the valve body.
- Vacuum testing confirms 22 inHg seal across all reamed spool valve bores.
- Balanced remanufactured torque converter stops driveline vibration and prevents front pump bushing wear.
- Raybestos GPZ friction plates resist thermal glaze under demanding stop-and-go commuter traffic.
- Hardened output shaft splines eliminate strip failures common under hard vehicle launches.
- New variable-bleed control solenoids provide accurate 20 ms line pressure modulation across all throttle inputs.

AIDCO Bench Dynamometer Pressure Metrics

Every remanufactured 8L45 transmission runs on an automated AIDCO dynamometer through cold start and elevated operating temperatures. Gauges register main line pressure at 185 PSI in Drive and 250 PSI in Reverse at 1600 RPM. Electronic pressure control solenoids modulate hydraulic passages within 20 ms under computer diagnostics. Valve body passages hold 21 inHg vacuum during static bench drawdown tests. The test software logs zero converter clutch slip at cruising speeds. Fluid temperatures hold steady at 175°F.

Field Installation Directives Application Limits

Push the torque converter inward while spinning the hub to ensure complete engagement into the oil pump drive lugs. Check engine alignment dowels for burrs prior to pulling the transmission against the engine block. Do not buy this factory unit for supercharged track racers or custom engine swaps.

- Flush chassis radiator transmission cooler lines with heated solvent to clear trapped metal particulate.
- Fill with approved Mobil 1 Synthetic LV ATF HP fluid at 40°C pan temperature.
- Reset transmission shift adaptives using an advanced scan tool before highway road testing.

Nationwide Warranty Freight Manifest Inclusions

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