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 - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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