I have replaced a lot of parts in the transmission. The vaccum modulator. I never thought of looking at the tranny. The egr valve. It did happen suddenly once we got back to Floriduh. An hose could have slipped there.
Thanks, gives me a place to look. When I adjust the carb idle mixture screw it seems to make no difference. The idle is a little high to compensate for the hesitation. I might back down on the idle once I find the source of the shudder. I know so little about emissions. Thanks