The nut is welded on the engine bay side of the plate. The sensor has separate lock nuts. There isn't much room on the flywheel side and one welded nut is plenty if that's what your implying.

Well my trans is done and going in hell or high water tomorrow. Gear oil will be NON synthetic Lucas 80/9â‚© weight. Need to bribe some young backs to put it in for me. I'm part of a Facebook club, indiana university sports car club. I've already had several offers for help. It will be a bit weird watching someone else working on my car in my garage.

Steve

The sensor is in the backing plate, but what triggers the sensor? Can you get some more pictures of the setup as it goes in. I like the idea of this type of trigger wheel.

Charles,

I think I showed more on my MS3X install thread here on classic. Also have a thread on Hybridz

Sorry for the short answer Charles, and  I see that my thread didn't show the flywheel. The flywheel has drilled holes at every 10 degrees which the gear tooth sensor picks up. I will find the pic somewhere.

Thanks Steve. I will look for links

So you just have to dimple the flywheel to get a tone, not drill all the way through? Who drilled it for you? Machine shop? How accurate do they have to be and was rebalancing necessary?

It's a gear tooth sensor, so it picks up small deviations, Those holes aren't very deep, maybe 1/4" deep or so. I drilled it myself. I used my degree wheel to mark it off. I did have it rebalanced to make sure. As far as accuracy, the MS unit ran fine with my garage high tech drilling. I used my drill press and marked the bit to have consistent depth.  

All questions I was going to ask myself! I'm thinking of doing the same, but I don't know if I trust my accuracy!

You don't need that many reference holes. I think the guy I got the idea from had 3

Thanks, Steve. So if you have that many and the other guy had 3 do you tell the software how many pulses make a complete revolution?