@GDads51 you are very likely correct. I thought the rig had a 700R4 but now after this thread, I believe I was mistaken and it's the heavier duty option you mention. The rig in question rolled over the scales empty at 8600lbs, and was powered by the 6.5l turbo diesel, from the last year or two before Duramax. It had a 14' steel dump bed with 6' high steel sides. Great rig for hauling a lot of junk.
