If your loader won’t shift out of neutral, jumps into gear harshly, or seems to ignore your shift commands altogether — the issue might not be mechanical. In many cases, it’s the transmission control module (TCM) that’s causing the trouble.
So… do we repair transmission control modules at UpFix?
✅ Yes, we do! And we can save you time, money, and frustration with fast, plug-and-play repairs — no programming needed.
⚠️ Common Symptoms of TCM Failure in Loaders
When a transmission control module goes bad, the symptoms can mimic hydraulic or mechanical problems. But if your transmission is physically fine, the TCM is often to blame.
Here are some of the most common signs:
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🚫 Loader won’t shift out of neutral
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🔁 Erratic or delayed shifting between gears
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💥 Harsh engagement when shifting
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🐌 Only one gear works (e.g., stuck in 1st or reverse)
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⚠️ Flashing gear indicators or warning lights
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🔌 No response from gear selector or joystick
If you’ve already checked for mechanical problems, bad solenoids, or low fluid — it’s time to look at the control module.
🛑 Common Error Codes / Messages:
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TCM 523955.07 – Gear select fault
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SPN 191 FMI 11 – Shift actuator fault
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SPN 639 FMI 2/9 – Lost comm with transmission
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“Gear Position Invalid”
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“Cannot Shift” on cluster
🔧 Common Symptoms:
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Stuck in gear or won't shift
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Jerky or delayed shifting
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Unresponsive shift lever or joystick
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Transmission fault light flashing
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Warning: “Neutral Only Available
🔍 What Causes Transmission Control Module Failure?
TCMs in loaders are exposed to vibration, heat, and electrical stress. Over time, internal electronic components can wear out or become damaged.
Common causes of TCM failure include:
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⚡ Voltage spikes or grounding issues
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💥 Blown internal relays or drivers
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🔩 Cracked solder joints from vibration
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🔌 Corroded or loose connectors
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💧 Moisture intrusion leading to short circuits
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🔁 Failing memory chips or logic circuits
Many of these issues are hidden inside the module and cannot be fixed by simply replacing a fuse or wire — they require expert-level repair.
🛠️ How UpFix Repairs Loader Transmission Modules
When your TCM arrives at UpFix, we perform a full restoration process:
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🔍 Full diagnostic testing to pinpoint the failure
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🛠️ Component-level repair of damaged relays, chips, and drivers
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💧 Corrosion removal and moisture-proofing
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🔌 Connector and pin inspection
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🧪 Bench testing under simulated load and shifting conditions
Once repaired, your module is returned plug-and-play ready — no programming or coding required in most cases.
🧰 Loaders & Brands We Commonly Support
We repair TCMs for a wide variety of loader types, including:
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Compact Track Loaders & Skid Steers
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Wheel Loaders
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Backhoes & Industrial Tractors
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Utility & Heavy Equipment
✅ Brands include:
John Deere, Case, New Holland, Kubota, Bobcat, Caterpillar, AGCO, Massey Ferguson, and others.
Don’t see your model listed? Just ask — we’ve repaired hundreds of modules not listed online.
👉 Submit a Custom Repair Request
💰 Why Choose UpFix for TCM Repair?
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✅ Save 50–80% vs. buying a new module
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✅ No programming required — just plug it in
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✅ Fast turnaround — typically 2–5 business days
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✅ Keep your original OEM part and calibration
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✅ Trusted since 2006 with over 1 million modules repaired
📦 How to Get Started
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Use the provided shipping label to send your TCM
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We’ll repair and test it
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You reinstall — and get back to smooth shifting
📞 Need Help or Have Questions?
Call or text our team at 888-979-9343
Or reach out online anytime:
👉 Contact Us
💡 Stop the Shifting Struggle — Let UpFix Repair Your Loader’s TCM
Don’t spend thousands replacing your loader’s transmission controller when it can be repaired, tested, and restored for a fraction of the cost. Whether you're dealing with erratic shifting, stuck gears, or complete failure — UpFix has you covered.