When I feather the gas on my '02 Camry SE 6 cyl auto (60k mi.) as I'm drifting along in 35 - 45 mph traffic I experience a marked 'thud' as the overdrive kicks out. Never happens if I turn the overdrive off. It seems to happen more when the engine is cold. ATF is red and full - smells OK - what else should I check?
Thanks for any help.
JustDave