Allison 1000 & 2000 Gen 4 Fault Codes: P0722 Output Speed Sensor Circuit No Signal CIRCUIT DESCRIPTION:The speed sensors are...

Allison 1000 & 2000 Gen 4 Fault Codes: P0726 Engine Speed Input Circuit Performance CIRCUIT DESCRIPTION:The speed sensors are variable...

Allison 1000 & 2000 Gen 4 Fault Codes: P0727 Engine Speed Input Circuit No Signal CIRCUIT DESCRIPTION:The speed sensors are...

Allison 1000 & 2000 Gen 4 Fault Codes: P0731 Incorrect 1st Gear Ratio CIRCUIT DESCRIPTION:The Transmission Control Module (TCM) uses...

Allison 1000 & 2000 Gen 4 Fault Codes: P0732 Incorrect 2nd Gear Ratio CIRCUIT DESCRIPTION:The Transmission Control Module (TCM) uses...

Allison 1000 & 2000 Gen 4 Fault Codes: P0733 Incorrect 3rd Gear Ratio CIRCUIT DESCRIPTION:The Transmission Control Module (TCM) uses...