If you are trying to save the $60-120 for an angle drive you won't come out ahead. If the angle drive is maintained properly (BIG if) they actually hold up quite well. BMW has been using electrical speedos driven from an impulse sensor in the differential since at least the mid-1980s. Problem with any of this is the complexity and calibration of the mod. You need to change the gauge in the dash, find a pickup point etc. And have it come out not looking hacked up. If you are doing this for the "something cool/different" factor, here's another idea. The electronic speedo gauge in a late 80-s 3- series BMW is about the same size as the DMCs, and the pickup is mounted in the bottom of the differential. No clue how much of this is interfaced via the vehicle's computer, but in an 80s car it should not be too bad. Nice thing is that they are 6-digit odometers too. The most common place to mount an electrical impluse sensor on the DMC (often for cruise control) is to put a magnet on the inner CV joint and attach a bracket for the sender to the transmission. Dave S --- In dmcnews@xxxxxxxxxxxxxxx, "Nick Kemp" <nkemp@xxxx> wrote: > The message read: " As a side note, many new cars have an electronic speed > sensor > that uses rotation in the transmission final drive as the measured > parameter, and then sends an electronic signal up to the > speedometer. There is no mechanical link beteen the transmission and > the speedo. Something like that has been discussed on this List in > the past. I don't recall anything beyond the talking stage, however." > > As a backup, I've pondered adding a bicycle speedometer. The question is > not so much where to mount the magnet but how to mount the sensor. > > Just a thought. Any input? > > Nick