How to Use the Monster RTD Tool (Remote Tuning Device)

[00:00] What the Monster RTD Does

The Monster RTD plugs into your vehicle’s OBD-II port and works with your phone to capture your current file and then write the updated file back after your new transmission is installed.

[00:25] Before You Start (Do This First)

Set yourself up for a clean read/write:

• Use a battery charger/maintainer during the process (stable voltage matters).
• Make sure your phone has good signal/Wi-Fi if the app needs to upload/download files.
• Key position matters — follow the on-screen prompts in the RTD app.

[00:55] Step 1 — Plug In & Connect

Plug the RTD into the OBD-II port, open the RTD app on your phone, and connect. No invite code required — Monster devices are pre-assigned and auto-link when plugged in.

[01:25] Step 2 — READ Your File (Before Removal)

This is the most important step: READ your current file before you remove the old transmission. Let the read complete fully — do not interrupt power during the process.

[01:55] Step 3 — Install the Transmission

Install your new transmission, re-check connectors/grounds, fill fluid, and get everything ready to write the updated file. Your vehicle may not start/drive correctly until the write is completed.

[02:20] Step 4 — WRITE the Updated File (After Install)

Once you receive the updated file in the app, select it and perform a Full Write (often triggered by a long press / hold action in the app). Do not unplug or cycle power mid-write.

[02:55] Quick Fitment Note (Credits)

Make sure you’re using the correct RTD version for your vehicle:

• 2007–2016 typically uses the 2-credit RTD.
• 2017+ typically uses the 4-credit RTD.

[03:20] Best Practices (Avoid Headaches)

• Keep voltage stable the entire time (charger recommended).
• Don’t rush the read/write screens — wait for the “success” confirmation.
• If something looks off, stop and contact Monster before repeating writes.