MrTorresJr

I have driven my 72 CS a few times and never encountered this issue that I did today. I positioned it in 'DRIVE' and upon accelerating it sounded as if the RPMS were increasing yet the speed was not. I flushed the tranny, replaced the gasket & filter about 1 month ago, thoughts? I tried shifting through the gears and still encountered the same issue.

Allan R

Are you sure the tranny has enough fluid? If it worked fine before the flush chances are you just need to top it up?

oldcutlass

Please note, I moved your post to the correct category.

I would check the hose to the modulator and/ or the modulator itself. Item #2 would be to check the detent cable between the gas pedal and the transmission to see if the trans is hung up in passing gear.