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I installed the new sensor today. I managed to start it in the threaded flywheel housing hole from the engine bay, running my arm underneath the steering shaft and squeezing my hand around a ground strap to get to the spot. After I got a good bite in the hole, I went into the cab and finished...

From what I could tell the speed sensor was never replaced before. I'm pretty sure it came from the factory like that. There's no maintenance interval for the sensor itself - just replace it when it's not working. I'm surprised as well that it worked for as long as it did! It makes me wish I...

3 years later the tach finally quit working. I decided to tackle it now since I think I have a low-idle problem to troubleshoot. Running through the TMs diagnostic instructions, I determined that the tach was okay and the induction sensor was dead. I think I see why it quit working... It was...

After driving my truck a bit more, it seems the tach is still off a little bit, by maybe 200 RPM or so. Idle speed is spot-on it seems. It just gets a little wacky when running the engine faster than that. At this point that'll probably be a next year project.

I got it out a second time yesterday to move some more big stuff and the tach still works right! I hope it stays that way🤞

I actually woke my M35A3 up from its winter slumber today to move some more big stuff from my old home. The roads were dry and looked pretty salt-free due to precipitation and melting over the past week, plus I figured on rinsing the underside of the truck with my garden hose when I was done...