I have owned the car for 3-4 years used it for a daily driver for the last 4 months. I drive it now about 30 miles a day mostly 65-70 on the freeway in flat Texas 15 miles each way. it doesnt smoke much at all runs with no detonation, everything works but the A/C (compressor gave out just this summer).

the issue is the trans started shifting hard (banging from 1st to 2nd) then acted normal... now it is under light throttle slipping in 4th gear. if I shift it back one to gear and then to "drive" well giving it good throttle it engages and no problems. It seems inconsistent. I checked some of the vacuum lines all seem good, the locks work and it shuts off with the key at zero hesitation. it is not leaking any fluid the level is good as well.

any thoughts?

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MAKDUFF3

1975 300D, Feuerrot and Parchment interior

1971 220D (RIP)