3 Common Allison Transmission Problems

Allison transmissions are custom-designed for several different industries and provide valuable power and work. However, even these revolutionary pieces of equipment can have problems. Do you know how to identify and deal with an issue that may arise with your Allison transmission?

Is your Allison transmission giving you trouble? Learn what might be happening and how to fix it here.

What Might be Wrong with Your Transmission

Your Allison transmission could be experiencing a part failure, in which case your best bet is to take advantage of the provider’s warranty. However, you may actually be experiencing a failsafe instead. Which of these potential problems apply to your situation?

  1. Limp mode (Allison 1000 model)
  2. Hooked up incorrectly
  3. TCM module problem

1) Limp Mode (Allison 1000 Model)

The Allison transmission 1000 model has a feature called “limp mode”, in which the transmission locks itself into third gear. This mode is triggered by anything that could cause severe damage to the transmission, including severe overheating or towing a very heavy load. Unfortunately, a driver can’t reverse limp mode. If you find yourself stuck in third gear with this model of transmission, it’s probably time to have it rebuilt.

Pro Tip: Keep your Allison transmission well-maintained to avoid accidentally triggering limp mode. This will also improve your vehicle’s overall functionality!

2) Hooked Up Incorrectly

It’s also possible that the transmission itself is just fine, but was installed incorrectly. If your transmission is installed in an older vehicle, check the vacuum lines and other parts connected to the transmission. If there’s anything out of place, switch them back and try again to see if you can duplicate the problem.

3) TCM Module Recall

Allison transmissions built in the mid-2000s had a recall issued for their TCM module. If yours appears to have never been replaced, your best bet is to contact the manufacturer and ask about the replacement process. Don’t keep driving a vehicle with a faulty part!

Durable Transmissions

With proper maintenance and normal usage, Allison transmissions will last you a very long time with few problems. But things may go wrong rather unexpectedly. Don’t let a transmission in need of repairs bring your workplace to a halt! Take advantage of our extensive warranty coverage to have your transmissions fixed or replaced with new models.

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