DL240 overdrive and kickdown cable on automatic

[ed7]

Unless she's towing a trailer, she doesn't need the OD disengaged. The OD switching is noticeable regardless of which gear the trans is in. The default is disengaged OD.
To eliminate the kick-down, count the shifts the trans goes through as you get up to speed. The kick-down could be out of adjustment or hanging up in the cable sheath. It should have about 5mm slack.
Buy the OD bypass plate if that is the problem
Ed

[lummert]

I have had the bypass plate installed on my 1988 760 Turbo Wagon for about 5 years now. it hasn't caused me a second thought.

[lummert]

Did you try checking for current to the solenoid? I have read about someone finding a broken wire running to the solenoid.

[ed7]

A broken wire is common under the car. The solenoid doesn't make a lot on noise, it's barely noticable.
If you're getting voltage on the solenoid wire under the car, the solenoid/valve is shot.
Ed

[lummert]

Modifying what you have also works. I was going to suggest that, I just wanted to wait until you checked every last part.