DT12 TRANSMISSION ISSUES, STUCK IN NEUTRAL (2024)

FAQs

How long do DT12 transmissions last? ›

Our transmissions come with a five-year/750,000-mile standard warranty. The clutch comes with a three-year/350,000-mile warranty. Creep Mode makes backing up to a loading dock safe and easy. The DT12 is engineered for enhanced flexibility and drivability.

The starter blocked message will come on any time the truck is unable to read the neutral safety switch on the transmission. This is broadcast through the CPC and won't be recognized if the CPC isnt' initializing.

• Low transmission air pressure message: This issue may be induced by a vehicle air system not functioning properly resulting in the inability to achieve or maintain operating air pressure. Low air pressure may be induced by excessive use or cycling of the service brake, exhausting the vehicle air supply.

SPN 521485/FMI 2

Gear Rail Split Sensor - Gear Position Erratic Check as follows: 1. Remove the TCM X1 connector. Inspect the X1 connection for water intrusion, damage, corrosion or bent pins.

DT12 Vocational Series transmissions offer the ideal blend of technology and toughness. They've been tested for thousands of miles with precise engineering for jobsite environments, and provide 12 speeds for increased efficiency and flexibility.

The DT12 transmission is available with a rear mounted PTO prep option. The option includes all the vehicle wiring and transmission elements needed to support the PTO without the addition of the PTO hardware on the transmission.

To resolve the issue of your transmission being stuck in neutral, try shifting through all the gears while the engine is off. This doesn't always work, however, so you might need to pay a visit to a mechanic. Caring for your transmission can help avoid it getting stuck in neutral.

Neutralin an automatic car disengages the transmission from the engine.

Neutral safety switches prevent the vehicle from starting if the transmission is in gear. You can find the neutral safety switch in the steering column of your vehicle, though the location might vary from model to model. Accessing the neutral safety switch requires you to get underneath your vehicle.

Turn off your vehicle's ignition and wait patiently for 5 to 10 seconds. Start the engine and allow it to idle for several seconds. Switch off the ignition and wait patiently for another 30 to 40 seconds. Repeat these steps 2 to 3 times in order to reset your vehicle's transmission control module.

How do you get air out of a transmission? ›

The best way to bleed the system is to use a hand vacuum pump at the slave cylinder. Fill the reservoir with fluid and then get under the truck. At the slave cylinder there should be a bleeder valve like on a brake caliper. Attach the vacuum pump to the valve with a rubber hose that fits tight.

With faulty transmission fluid pressure switches, your transmission will not shift correctly. The Check Engine light will illuminate, and you may not be able to shift into higher gears.

SPN 96 /FMI 13

Description This fault indicates a missing fuel level signal at the Common Powertrain Controller (CPC). Check as follows: NOTE: Fuel level sensor is hardwired to instrument cluster. Fuel level signal is multiplexed from instrument cluster to the CPC.

SPN 521486/FMI 2

This diagnostic is typically Clutch Position Sensor - Data Erratic. Check as follows: NOTE: Transmission Control Module (TCM) faults SPN 520971/7 and SPN 521491/2 may also be present when this code sets.

transmission warranty

For the DT12^®, warranty coverage is 5 year/750,000 miles on 100% on-highway applications in the U.S. and Canada. The CPCA clutch coverage is 3 year/300,000 miles.

If a transmission is properly rebuilt by a skilled mechanic, it can often last between 100,000 to 200,000 miles or even more. The key to a long-lasting rebuilt transmission is addressing all the existing problems during the rebuild, using high-quality parts, and ensuring everything is assembled correctly.

For a new transmission, you can typically expect it to last for up to 100,000 miles, which for most drivers will be about seven years. When you buy used, the transmission may only last for 50,000 miles or fewer.