Got a problem with a 4 speed auto in an 1982 300D. Taking it easy, all gears shift normally except from 3rd to 4th. I get a flair where the rpm's increase quite a bit before it will "catch" and hold in 4th gear. Normally, I've been letting off the gas when it changes into 4th so it doesn't flair.
Here's the kicker. If I'm going 60 mph in 4th gear and I floor it, the tranny will kick down into third gear. It will shift flawlessly into 4th with no flair at all when I hit 70-75mph.
What could cause this? Makes no sense to me.....
Roger