Thanks Brian! Great explanation. what causes flaring?

My 83 seems to take longer to shift from 3rd to 4th than from 2nd to 3rd. Also, when coming to a stop going into low gear, the tranny makes a pronounced thunk. Is that normal?

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85 300D turbo pristine w 157k when purchased 167,870 July 2025
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked