Transmission Assembly for 2013 Nissan TITAN

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

• Verify original transmission tag displays code 9FM1C or 9FM1D.
• Confirm vehicle has a floor-mounted shifter.
• Confirm vehicle is a 4x4 model.
• Verify starter motor is located in the 8 o'clock position.
• Inspect coolant overflow tank and radiator cap for pink, milky fluid (SMOD).

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

Special tools this job needs:

• heavy-duty transmission jack
• 30-inch socket extensions
• swivel/u-joint socket
• OBD-II scan tool with live-data capabilities
• fluid transfer pump

Budget for these consumables at install:

• Genuine Nissan Matic S ATF (or high-quality synthetic equivalent meeting Matic S specs)
• Transmission pan gasket (Nissan P/N 31397-90X0A)
• Internal metal mesh fluid screen / filter
• Front pump input seal (torque converter seal)
• Rear output shaft seal
• Aerosol cooler cleaner / flush (Nissan P/N 999MP-AM006)

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

What’s involved: TCM Adaptive Strategy Relearn

The internal TCM is pre-programmed and does not require VIN-specific dealer programming to start. However, a TCM adaptive learning reset is mandatory to clear donor vehicle shift adaptations. While professional scan tools (like Nissan Consult-III) are highly recommended, some manual pedal-dance procedures exist. Cautious value chosen due to differing research arm claims on tool necessity.

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

• Torque Converter Seating: Must feel/hear three distinct drops. If not fully seated, bolting the transmission to the engine will crack the front pump and destroy the unit.
• Upper Bellhousing Bolt Access: Requires supporting the engine, removing the crossmember, and tilting the transmission down to access with a 30-inch extension.
• Fluid Level Check Temperature: Must check via overflow plug (or dipstick if equipped) with engine running, vehicle level, and fluid temperature strictly between 95°F and 113°F (35°C to 45°C).
• Cooler Line Restrictions: Do not bypass the factory radiator cooler with a generic aftermarket cooler, as the lock-up clutch relies on factory backpressure restrictions.

Easy to get right once you know them:

• Ordering the wrong version (Big Tow package vs non-tow package).
• Failing to flush the transmission cooler lines, washing old debris into the replacement unit.
• Reusing a contaminated radiator after an SMOD failure instead of replacing it.
• Skipping the TCM adaptive relearn, leading to harsh shifting or slipping.

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: