Hopefully one of you guys can help with this. I have a 200-4R with lockup converter behind a mild 350 in my 69 Chevelle. My problem is that all of the sudden, I cannot manually hold 1st gear. When I pull the shifter all the way back into the "1" position, the tranny shifts to 2nd at about 4000rpm, even though I have the shifter back in 1st. There is nothing obvious wrong with the shift linkage, and I use a Shiftworks conversion kit on the stock Chevelle floorshifter. Is a linkage problem the only possible explanation, or could there be an internal problem causing this? Needless to say, my ET is suffering with this early shift. Also, I can hold the car in 2nd or 3rd as long as I want, it is only 1st that is giving me grief. Thanks in advance.