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Current: 82 380SL, 83 300D, 90 300E; Former 72 280SE, 85 380SL, 89 300E, 91 420SEL, and more!
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48 Posts
Discussion Starter #1
Hey all, I have a serious transmission fluid leak. The car sitting for 3 days leaves a good 1/2 quart on the ground.

But I cannot seem to find the leak. The Torque converter is dry as a bone on the outside, so its not that bolt.

I thought it was the pan because I had changed on it not too long ago, and might have mis-torqued a bolt? So I dropped it again, changed the filter again, and put in more fresh fluid. I couldnt see a drop on the pan or bolts an hour later. By the way this time I removed every spec of possible grease or crud and resealed to 8 NM on each bolt.

The pan is NOT the issue, but its leaking up above the pan somewhere.

Again this is just red, it looks like a murder scene under there after a few days.

Where might the leak source be above the pan? The dipstick tube maybe? any ideas? Anyone else have this before?

The trans shifts great by the way.
 

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12 odyssey (90k) 1995 E320 wagon (307k) 1983 500se (172k)
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3,115 Posts
Inspect cooler lines as well as dipstick area.
Have you changed fluid correctly? If you overflill, it will heat up and barf out the relief vent.
 

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1992 CE 300-24
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91 Posts
Since it is clean underneath, perhaps a sheet
of cardboard (or flattened box) of sufficient size
placed on the floor below the trans, extending
forwards to any connections will enable you
to track the source as it drips on down from above?

If its from the front, it could be from the cooler/lines
complex, going back past the dipstick/filler tube, & if
further back yet, may be from a blown internal seal that
leaks (or does not) while running, then somehow drips
out later, drawn down by gravity or pushed by a full pan?

Per the previous suggestion, does the level indicated
on the dipstick show as needing a top-up, now?
 

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Registered
Current: 82 380SL, 83 300D, 90 300E; Former 72 280SE, 85 380SL, 89 300E, 91 420SEL, and more!
Joined
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48 Posts
Discussion Starter #4
Are there any common leak areas on or around the trans? I will keep tracing.
 
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