700R4 leaking after sitting a while

[OuchMyToe]

My daily driver was parked for s couple months while I helped out driving a van pool. Today I noticed a large amount of fluid had leaked out. I checked levels and it's ATF. I was about to clean and baby powder the whole underside, but then I paused and thought I'd post here and ask. It seems to me that ATF leaking only AFTER sitting for a while might be something unique. I fear that as the fluid slowly drains and fills the pan, the level finally reaches one of a dozen possible leak locations. It *seems* to be concentrated in the front-drinker (passenger) corner of the pan. I'd appreciate any comments (like—"9 out of 10 times it'll be the ..." or "that happened to me and the shop said the ... I'd almost the culprit.)

 

[dd1990]

I had same issue once I parked my burb on the drive wayy for a while...I believe I had over filled transmission and it leaked through the vent on the top of transmission

 

[Tonimus]

Double check the pan bolts. Never hurts.

 

[OuchMyToe]

I had same issue once I parked my burb on the drive wayy for a while...I believe I had over filled transmission and it leaked through the vent on the top of transmission

Interesting...

 

[PrairieDrifter]

Transmission fluid is sensitive to temp fluctuations when sitting. It will expand out of all the small passages and orifices inside the trans and push out. If you leave a transmission in storage with a full pan, you'll end up with a GIANT mess, ask me how I know lol.

Usually when sitting in the truck not in use, the torque converter will empty itself because of temp fluctuation, filling the pan and leaking.

Clean it up. Add fluid, warm it up, run it through the gears and check fluid again. Then watch it after a few drives for leaks. I'd bet you don't have a bad leak, might have some weeps. But I'd bet it's fine.