Transmissions Archives

Allison Automatic Transmissions – The Best Powertrain Component For Fleets

Allison Automatic Transmissions Exclusive to School Buses I was thinking how many Allison automatic transmissions are operating in North American school buses. There must be thousands (probably more)….no other brand that I know of is being used more than Allison. Automatic transmissions are by far the best drive train component to run in any fleet… Continue reading Allison Automatic Transmissions – The Best Powertrain Component For Fleets

Allison Transmission Troubleshooting

Allison Automatic Transmission Wiring & Troubleshooting The Allison Transmission Control Unit on the 1999 Saf-T-Liner is located under the floor directly below the driver. There are 3 plug-ins which is an easy way to tell this is a W-TEC 3 system [World Transmission Electronic Unit 3rd generation]. The Transmission vehicle speed signal enters here and… Continue reading Allison Transmission Troubleshooting

Allision MD 3000 Transmission Corrosion

The Vehicle Interface Module or VIM is a self contained pre-wired control box that simplifies the connections between the Electronic Control Unit [ECU] and the vehicle electrical system.The operator experienced a high transmission temperature with no high idle and exhaust brake. The fault codes indicated a power interruption between the battery and ECU.The VIM {pictured… Continue reading Allision MD 3000 Transmission Corrosion