I've got a 1987.5 190D 2.5 Turbo with automatic transmission. I've fiddled around with the transmission linkage deal near the throttle and got the transmission shifting at the proper point. 4th gear does that "flaring" jazz though. It almost never actually works. It'll try to shift into 4th and instead it's like its sitting in neutral. I changed the transmission fluid and filter (the fluid was brown as flip). Problem is I can't tell if its got enough in it or not. I put in 5 quarts. The dipstick seems pretty useless. Every time I pull it out its got fluid about a foot up the dipstick. The manual says its supposed to be useful but it sure doesn't seem to be.

Anyone got any advice on how to get the proper amount of fluid into this guy?

Advice for how to fix the 4th gear flaring?

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