Automatic Transmission Assembly for 2013 Cadillac ATS

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

• Verify the 8th digit of the VIN is D (for 3.6L LFX V6 engine).
• Physically confirm the vehicle is All-Wheel Drive (AWD).
• Check the Service Parts Identification label (RPO codes) in the glove box or door jamb for code MYA and confirm the absence of code V03.
• Locate the ID tag on the passenger side of the transmission case above the oil pan rail.

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

Special tools this job needs:

• Transmission jack
• External Torx (E-Torx) socket set (E10, E12, E14, E18)
• Fluid transfer pump
• GM-compatible J2534 programming tool or dealer-level scan tool (Tech 2 / GDS2)
• Engine support bar

Budget for these consumables at install:

• GM OE-Spec Dexron VI Automatic Transmission Fluid (or Mobil 1 Synthetic LV ATF HP)
• ACDelco Transmission Filter (Part #24252158)
• ACDelco Pan Gasket (Part #24225800)
• Torque Converter Seal (Front Pump Seal)
• AWD Spline O-Rings (GM Part #24251228)
• High-temperature spline grease
• Cooler-line flush solvent

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

What’s involved: VIN flashing and TCM Adaptive Relearn (Service Fast Learn)

The internal TEHCM must be programmed to the vehicle's VIN using a GM-compatible J2534 tool (or original TEHCM swapped). Additionally, a Service Fast Learn adaptive relearn procedure must be initiated using a GM-compatible scan tool to prevent limp mode and clutch damage.

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

• Torque Converter Seating: Must feel three distinct drops/clicks and verify the converter is recessed by at least 1 inch from the bellhousing face before bolting to the engine to avoid cracking the front pump.
• AWD Spline Corrosion: Clean splines with a wire brush, apply high-temperature grease, and install new O-rings to prevent rust and stripped splines.
• Fluid Level Check Procedure: No dipstick. Must check from underneath with the vehicle level, engine running in Park, fluid temperature between 30C and 50C, using the standpipe level-control plug.
• E-Torx Bellhousing Bolts: Must use E-Torx sockets to prevent stripping the bolt heads.
• Mandatory Cooler Line Flush: Must flush the lines to clear out debris from the failed unit and prevent immediate contamination.

Easy to get right once you know them:

• Ordering RWD instead of AWD.
• Ignoring the cooling option (ordering for a vehicle with V03 extra cooling when this unit is without).
• Driving the vehicle without performing the TEHCM programming and Fast Learn adaptive relearn.
• Reusing the old torque converter seal.
• Checking the fluid level with the engine turned off, causing severe under-filling.
• Skipping the mandatory transmission cooler line flush.

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: