DEF level
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5th Wheeling
Joined: Sep 2022
Posts: 34
Likes: 7
From: Ohio
DEF level
My 26 F350 was showing 55% DEF on the gauge so I added about a gallon. Then noticed it was dripping out underneath the bed, even though the gauge is only showing 66%. I am assuming the gauge is incorrect?
Cargo Master
Joined: Apr 2018
Posts: 2,376
Likes: 1,109
It takes a few minutes for it to recognize, it does not work like a fuel gauge.
Lead Driver
Joined: May 2021
Posts: 5,776
Likes: 3,431
From: Uh oh, CA
The 22’s have a 7.5 gallon tank. Not sure about the 26’s, although I doubt it would be smaller. If it is also a 7.5 gallon tank and you were at 55% you should have been able to put 3 gallons in no problem. If you saw something underneath leaking it wasn’t from overfilling. Keep an eye on it and if you see it leaking again take it back in. Or, crawl underneath and check. If it’s as simple as tightening something up it’s way better to just tighten it than go through the hassle of letting the dealership handle it…
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5th Wheeling
Joined: Sep 2022
Posts: 34
Likes: 7
From: Ohio
The 22’s have a 7.5 gallon tank. Not sure about the 26’s, although I doubt it would be smaller. If it is also a 7.5 gallon tank and you were at 55% you should have been able to put 3 gallons in no problem. If you saw something underneath leaking it wasn’t from overfilling. Keep an eye on it and if you see it leaking again take it back in. Or, crawl underneath and check. If it’s as simple as tightening something up it’s way better to just tighten it than go through the hassle of letting the dealership handle it…
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