This one isn't really f body related but I know there's a few guys on here that know these transmissions fairly well. I have a 1990 S10 4x4 with a mild built 355 that is still run by the TBI system. Pretty much plug and play. I also put in a rebuilt 700r4. the setup worked great for 3 years 25,000 miles then I had to store for almost 2 years. I went and drove it and it shifts great still but after 45 when it should lock it does some weird stuff. It locks and unlocks simultaneously. I'm stumped at this point and really don't wanna pull this thing if I don't have to. I verified that the brake switch works fine yet so that isn't it, or at least i don't think so. Any idea's?