I just went down to the very old and very small Chevy dealer down the road from me. I kind of hit the jackpot. He just lost his Chevy franchise, but hasn't made it public information yet. He let me look through his many, many stacks of OEM Chevy service manuals, manual supplements, etc. Ends up I took a huge stack of books dating from 1987 to 1992 for V, P, G, and C/K trucks. Paid $30 for the whole mess. Took several trips to carry it all out. Service manuals, wiring diagram books , component rebuild books, etc. So, it seems I've got a lot of reading to do, but the info I need must be in there somewhere.
Also, with a quick glance, I noticed that none of the 1991 GM manuals show any info on the 700R4. They only mention the 4L60 and 4L80. They show the 4L60 having the RPO code of MD8. That is the same RPO code they used previously for the 700R4, so maybe it IS a 4L60. I have no idea how to determine that, and maybe it doesn't matter anyway.
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Today's Featured Article - 12-Volt Conversions for 4-Cylinder Ford 2000 & 4000 Tractors - by Tommy Duvall. After two summers of having to park my old 1964 model 4000 gas 4 cyl. on a hill just in case the 6 volt system, for whatever reason, would not crank her, I decided to try the 12 volt conversion. After some research of convert or not, I decided to go ahead, the main reason being that this tractor was a working tractor, not a show tractor (yet). I did keep everything I replaced for the day I do want to restore her to showroom condition.
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