Update... I have a feeling the Bonnie is having some sort of new engine issue apart from the trans code we got. Whenever the grinding/shaking starts, usually after having slowed down or come to a stop, I've noticed if the engine rpm's are originally between 500-800 idling, and you try to accelerate the engine will NOT increase rpm's when the grinding/metallic noise is occurring. Usually when the other trans slipped/wouldn't shift your rpm's would still go up according to how much you gave it gas- but I've just realized the rpm's are not budging at all. Is this some weird type of misfire or what? How I remember misfires the rpm's would dip and fluctuate when you lost power, but this is very odd and the noise is also unsettling - I'm currently now worried for the well-being of the engine more than the transmission![]()