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Monster Install Checklist

Follow These Steps to Avoid Transmission Failure

Your Monster Transmission is dyno-tested and converter pre-installed. Follow this checklist during installation and programming to protect your investment and keep your warranty in good standing.

1
Proper Fluid Fill & First Start
Do not start it dry

Your torque converter is already installed and fully seated by Monster. Do not remove the converter from the transmission.

Before initial start-up, add the recommended transmission fluid through the fill tube or service port so the unit is not started dry. After installation:

  • Start the engine with the vehicle safely on level ground.
  • With the brake applied, cycle slowly through all ranges (P–R–N–D–L) and back to Park.
  • With the engine at operating temperature and idling in Park, recheck and adjust the fluid level.
2
Clear Existing Trouble Codes
Start with a clean slate

Before driving on the new transmission, use a proper scan tool to clear any stored or historic DTCs in the ECU/TCM. Old codes left in memory can cause false diagnostics, erratic shifting, or limp mode with your new unit.

3
Transmission Cooler Flush or Replacement
Contamination is the #1 killer of new units

Any debris left in the lines or cooler from the failed transmission can be carried straight into your new Monster unit. We recommend:

  • Best practice: Replace the cooler and lines where possible.
  • At a bare minimum: Perform a Hot Flush with approved equipment before installation.

Not an Approved Flushing Method ✖

Not an approved flushing method

Approved Flushing Method ✔

Approved hot flush machine
4
Adjusting the TV Cable (700R4 / AOD, etc.)
Critical for shift timing & pressure

For cable-controlled units like the 700R4 or Ford AOD, a correct TV (Throttle Valve) cable setting is absolutely critical. An incorrect setting can:

  • Burn clutches in a few miles due to low line pressure.
  • Cause late, harsh, or inconsistent shifts.

Follow this setup procedure in the video below or consult the specific Monster instructions for your unit.

5
Programming & Relearn: 6L80/6L90 & 10R80
Do not skip this step

Late-model transmissions like the GM 6L80 / 6L90 and Ford 10R80 must be properly programmed and relearned. Skipping this step can cause harsh shifts, no-move conditions, damage to the unit, and can affect warranty coverage.

10R80 Requirements:

  • The PCM/TCM must be programmed with the correct 12-digit Solenoid Body Identification Number (SBID) and 13-digit Solenoid Body Strategy Number from the installed valve body.
  • After programming, perform the OEM-style Adaptive Learning Drive Cycle so the transmission can learn clutch volumes and shift adaptives.
  • Use a capable scan tool and follow Ford’s procedure or have a qualified shop/dealer handle the flash and drive cycle.

6L80 / 6L90 Requirements:

  • Use a GM MDI2 or equivalent J2534 pass-thru device with a GM Techline Connect subscription to perform a complete reprogram of the TECHM/TCM when the new transmission is installed.
  • OR, using HP Tuners: the original TECHM/TCM must be read out and saved before transmission removal, then written back to the new unit after installation.
  • Follow all clutch-relearn and fast-adapt procedures as outlined in the OEM/scan tool workflow.

For full step-by-step PDF guides and additional videos, see our Monster Installation Manuals .

Frequently Asked Questions

Do I need to install the torque converter on my Monster Transmission?

No. Your Monster Transmission ships with the torque converter pre-installed and fully seated. You should not remove the converter before installation.

Do I need to flush or replace the transmission cooler with a new transmission?

Yes. Monster strongly recommends replacing the cooler and lines where possible. At a minimum, a proper hot flush with approved equipment is required to remove debris from the failed unit.

Do 6L80/6L90 and 10R80 transmissions require programming after installation?

Yes. The 10R80 requires the solenoid body ID and strategy numbers to be programmed and an adaptive drive cycle completed. 6L80/6L90 units require a full TECHM/TCM reflash with an MDI2/J2534 and GM Techline Connect, or the original file must be read and saved with HP Tuners before removal and written to the new unit.

Final Checklist & Next Steps

Double-check fluid level, verify there are no leaks, confirm all electrical connections are fully seated, and ensure any required programming and adaptive relearns are complete before hard driving.

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