Good if you catch the leak in time ,bad if you dont,very bad if the trannie wont shift after filing her up to specs.I fall under the first catagory thanks to a short trip around the area but if it was a trip to town this would of come out to be a long day.It leaked out a quart or so at first ,then steadily got worse on my trip back after filing it up.Replaced both lines and will keep a good spare from now on in the car.Trannie service it next week just to be safe.

The rubber in the lines gets porous after a while and start to "weep." I replaced mine about 20K ago. Getting fittings to re-seat after R&R of radiator was a challenge. Snugging them up on the radiator side was nerve-racking since I didn't want to trash a brand new radiator. Clamping the lines off and maintaining immaculate cleanliness in and around the fitting nuts did the trick.

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327K on 1986 W201, 602.911, 722.414 2.5 190D ("The Red Baron")
139K on 1993 W124, 104.942, 722.433 2.8 300E ("Queen")

http://farm5.static.flickr.com/4081/...0bb92d3c_m.jpg http://i370.photobucket.com/albums/o...g?t=1325284354

Do not worry about your difficulties in Mathematics. I can assure you mine are still greater.
- Albert Einstein

take a walk down memory lane...

are you guys saying that leaks in the lines cause poor shifting... or the loss of fluid causes it?

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good question...

__________________
327K on 1986 W201, 602.911, 722.414 2.5 190D ("The Red Baron")
139K on 1993 W124, 104.942, 722.433 2.8 300E ("Queen")

http://farm5.static.flickr.com/4081/...0bb92d3c_m.jpg http://i370.photobucket.com/albums/o...g?t=1325284354

Do not worry about your difficulties in Mathematics. I can assure you mine are still greater.
- Albert Einstein

take a walk down memory lane...

Enough leaks out and it will shift harder or slow to hit its shift,more and its cooked.It was spraying a nice stream ,enough to were a 30 minute trip would have been a wrecker call as a return trip.