| Author | Message | ||
| T. (Bluegrass)
Rating: |
what I have Is an Eagle Bus with a VDO electronic speedometer, the bus use to have a Voith Transmission and the speedometer was hooked to that, I changed the Engine and Transmission to a Cummins and Allison MT-653 Transmission the speedometer will not work off the Allison trans, what do i need to do to get it to work. Thank You Tony | ||
| donnreeves
Rating: N/A |
My VDO speedometer uses a magnetic pickup that reads slots in the left front brake drum. Donn | ||
| Gary Stadler (Boogiethecat)
Rating: N/A |
Tony, VDO electronic speedometers work off a pulse generator of some sort (there are many kinds)-- some of them can be easily calibrated for different gear ratios and some can't. What specifically do you mean, "will not work off the Allison trans"? It could be that there's no place to hook wires, the sender won't fit, the speed is incorrect, etc... you need to tell us a little more. Off the top, knowing nothing about what's really going on, I'd first ask if you took the sender off of the Voith transmission. You should. If you did, then you need to figure a way to hook it into the speedometer port on the Allison. IF it physically won't fit, you probably need to: (a) machine up some sort of adapter to make it fit (b) Call on VDO and see what sort of new sender you can buy for your model speedometer that will fit the Allison After you have a sender of some sort working mechanically, then there's the matter of calibration. That might entail changing gears in the tranny, or it might involve a little external ratio-gearbox that you can select the right ratio, or it might simply involve an electronic calibration if the speedo is a newer self-calibrating type. My favorite Speedo is the newer VDO units... you simply hook up virtually any kind of sender with any gear ratio at all, then you put it into calibrate mode and go driving. You find a mile marker, push the button on the speedo as you slowly pass the marker, then push the button again as you pass the next mile marker. Instant calibration!!! Hope that helps... tell us more and we can help further.... Cheers |
