DrewT
Well-Known Member
My 2020 Mustang 10R80 has always had a peculiar 3-4 shift behavior under light to moderate throttle. The RPMS fluctuate all through 4th gear and the power is uneven. 5th gear kinda similar but other gears seem normal. I asked the dealer if there were any TSBs for the transmission when they were doing the brake fluid warning recall but they didn’t respond. I don’t think they looked. Is there a test for the CDF drum?Yep, usually it starts with a weird 3-4 and then slowly gets worse from there.
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