10-Speed Automatic Transmission Assembly for 2022-2025 Cadillac CT5 - Rear

A quick look at your own vehicle makes sure the right transmission shows up:

• Confirm the 8th digit of the VIN is Y, 5, or K to verify the 2.0L LSY Turbocharged engine.
• Scan the QR code on the driver's door jamb silver certification label to confirm RPO codes MI1 (10L60 transmission) and MQA (Rear-Wheel Drive).
• Physically look under the vehicle to confirm it is Rear-Wheel Drive (single driveshaft to the rear, no front axle shafts, front differential, or transfer case).

What the install really takes — plan and budget with confidence:

Special tools this job needs:

• Transmission jack
• Engine support fixture/bar
• E-Torx socket set
• Fluid pump and bottom-fill pan adapter
• J-2534 programming pass-thru device (e.g., GM MDI2)
• Active GM SPS2 subscription

Budget for these consumables at install:

• GM DEXRON ULV (Ultra-Low Viscosity) ATF
• Transmission filter (GM Part # 24294355 / ACDelco TF937)
• Pan gasket (GM Part # 24297886)
• Torque converter input seal
• Driveshaft seals
• Dedicated transmission cooler flush aerosol
• Exhaust flange gaskets
• Stretch-bolts for the transmission mount

What your vehicle’s computers will need after the swap:

What’s involved: Solenoid Valve Characterization Reprogramming (MCVM - Mechanical Characterization and Virtual Matching), VIN-Specific Programming, and Transmission Fast Learn

The internal Transmission Control Module (TCM) must be flashed using GM's Service Programming System (SPS2) via a J-2534 tool. The unique 16-digit Transmission Unique Number (TUN) from the replacement transmission's barcode sticker must be entered to download the correct solenoid characterization data. A 'Transmission Fast Learn' process must then be run to calibrate clutch apply pressures.

Pro tips for a smooth first start-up — hand them to whoever does the install:

• Torque converter must be fully seated into the transmission input shaft and oil pump gears (three distinct drops/clicks) before bolting to the engine. If not fully seated, tightening the bellhousing bolts will instantly crack the internal oil pump. The face of the torque converter must be recessed at least 1 inch from the bellhousing face.
• The transmission has no dipstick. Fluid level must be checked via a standpipe in the bottom of the pan. Fluid must be pumped in cold, then with the engine idling, checked strictly when fluid temperature is between 95°F and 113°F (35°C to 45°C). Never turn the engine off with the fill plug removed.
• Engine block alignment dowels must be clean and fully in place. Never use bellhousing bolts to force or pull the transmission case to the engine block.
• The transmission cooler and lines must be professionally flushed before connecting to prevent debris from the failed unit from immediately ruining the replacement transmission.

Easy to get right once you know them:

• Skipping the TUN/PUN programming, assuming the transmission is plug-and-play.
• Using the wrong fluid, such as generic multi-vehicle synthetic ATF or Dexron VI, instead of the required Dexron ULV.
• Checking the fluid level with the engine turned off, which causes severe underfilling.
• Mismatched drivetrain ordering (purchasing a RWD unit for an AWD vehicle or vice versa).
• Buying a 10-speed transmission from a different GM vehicle model (like a Camaro, CT4, or Silverado) assuming it will fit.

Not issues with the units on this page — the manufacturer documented these for every transmission of this family, wherever you buy one. Handy for your installer: