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The book I mentioned has a simple electronic amplifier and conditioner on page 128. It uses voltage comparator to trigger the base of an NPN transistor.

4 pulses per revolution is correct for a 4 stroke V8. The TCI controller might not recognize the factory engine speed sensor driven off the camshaft and oil pump..the factory ESS actually drives the oil pump..the book "The 6.2 Diesel Engine" published by The Diesel Page has an electronic...

This is a 205 TC M1031 SECM. PTO generator is one of the plus features I really use. Three drive shafts plus the TC shifter and PTO interlock. There is plenty room, GM positioned the engine as far back for center of gravity issues, the engine bay was designed to accommodate the 250/292 inline...

For my upcoming 4l80 swap, I bought the adapter from Advance Adapter for 205 transfer case. It's a 356 T6 aluminum casting with the larger index ring machined into the front. Its also relieved for the oil pan. Dakota Digital tach module and AC Delco TPS round out the sensor suite...

A bone stock 6X is perfect. I want original shift mechanism, probably with a new index in the dash as the detents are in the transmission. To the casual observer, it will be a nearly stock M1031. My only worries are on the non-stock first (2.97) gear set. Any weakness should have showed up...

A baseline 6X is plenty for my needs. The programmer is included, the only option is the torque converter..with only a fuel pump turned up a 1/4 turn and water injection, it should last for hundreds of thousands of miles. The only non-4L80 parts are the modified ratios.

My mind is set, I will scrimp, save and even sell myself to do this upgrade to my 1031. Yes, it is a 4L80 swap, externally but using TCI's highly modified 6X Six Speed. Yes, SIX speeds. How do they do that? Custom valve body which uses the overdrive to split the first 3 speeds. They also...

TCI :burn: Basically, it splits the lower ratios with the OD using slightly different ratios. The magic is in the valve body and control computer. Aside from the non-stock planetaries and valve body, it is a 4L80e. Ratios seem perfect for the 6.2 with 4.56:1 axles. Now to get them to accept...

Now I see a certain company now makes a highly modified 4L80e. With two additional forward ratios! Ah, choices.

You don't need a computer.. https://www.youtube.com/watch?v=ozbWf_QsPrw

NEAT!!! That is going to save time for certain plus make it far tidier under the hood. Although the the Dakota DSL-1 would be better with a gear tooth sensor instead of using the belt driven alternator tachometer output. Alternators go out, belts fail. It would work but gear tooth sensors are...

Excellent writeup. I want to do the same on my 1031. That is a NP205 figure 8 pattern. You mentioned the machining of the adapter, this would be a must since the figure eight bolt pattern adapter is rare.