Cadillac CTS STS 2004-2007 Automatic Transmission 5-Speed 5L40E Remanufactured

A 190 PSI forward line pressure curve delivers positive multi-pack clutch clamping across Cadillac 3.6L LY7 power bands. This remanufactured Cadillac 5L40E transmission 10722T matches 2004 to 2007 CTS and STS rear-wheel-drive sedans. Installers must complete a high-temperature cooler flush and perform a computer shift adaptation reset before road testing to safeguard internal friction surfaces.

Shot-peened A380 die-cast aluminum forms the longitudinal housing, checked for micro-cracks with dye penetrant around bellhousing and tailhousing mounts. Hardened planetary carrier gears transfer 255 horsepower without gear tooth pitting. Rebuilders install upgraded Sonnax pressure regulator valve sleeves, TCC control valves, Kolene steel plates, and high-energy BorgWarner frictions. Replaced pump stator bushings restore hydraulic circuit balance. The dry transmission weighs 162 lbs and ships inside a 36 by 24 by 22 inch crate.

Key Features of GM 5L40E

Technicians buy GM 5L40E transmission assemblies to eliminate converter slip codes without paying high dealer parts pricing. This commercial remanufactured transmission assembly provides durable gear engagement for Cadillac STS transmission replacement projects.

- Reamed pressure regulator valve bore stops internal line pressure drops that cause shift flare.
- Upgraded TCC regulator valve sleeve eliminates torque converter clutch slip and friction shudder.
- Vacuum testing confirms 22 inHg seal across all re-machined valve body bores.
- Balanced remanufactured torque converter eliminates driveline vibration and protects front pump drive gears.
- BorgWarner high-energy friction plates resist thermal glaze under demanding performance highway driving.
- Hardened sun gear drive shells eliminate spline strip failure under heavy throttle input.
- Updated solenoid group delivers precise 24 ms hydraulic line pressure modulation across all gears.

SuperFlow Dynamometer Diagnostic Telemetry Data

Technicians test each remanufactured 5L40E transmission on an automated SuperFlow dynamometer through cold start and elevated operating temperatures. Gauges register main line pressure at 190 PSI in Drive and 260 PSI in Reverse at 1600 RPM. Pulse-width shift solenoids show actuation times under 24 ms without mechanical bind. Re-machined valve body passages hold 21 inHg vacuum under static bench tests. Dynamometer instrumentation logs zero torque converter clutch slip under loaded grade profiles. Fluid temperatures hold steady at 175°F.

Field Installation Directives Application Limits

Push the torque converter inward while rotating the hub until you verify three distinct clicks. Make sure engine alignment dowels enter the bellhousing straight without draw bolt force. Do not buy this factory replacement unit for supercharged track racers, drift cars, or nitrous builds.

- Flush chassis transmission oil cooler passages with heated solvent to remove trapped friction particles.
- Fill with approved Dexron VI fluid while monitoring fluid level at 40°C pan temperature.
- Reset transmission adaptation registers using an advanced scan tool before highway test driving.

Standard Warranty Delivery Crate Manifest

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