3rd Gen Engine and Drivetrain -> 2003-2007 5.9 liter Engine and drivetrain discussion only. PLEASE, NO HIGH PERFORMANCE DISCUSSION!

HELP!!!! 48re Tranny Leak

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Old Dec 18, 2009 | 11:04 AM
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Undertaker's Avatar
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HELP!!!! 48re Tranny Leak

Guys I moved my truck this morning and when I got out of the truck I noticed about 4 or 5 drops of red fluid in the snow. I looked under the truck and on the bottom of the tranny pan there was fluid all over it. I checked the fluid level it is at the add mark. What could be the problem?
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Old Dec 18, 2009 | 01:12 PM
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Originally Posted by Undertaker
Guys I moved my truck this morning and when I got out of the truck I noticed about 4 or 5 drops of red fluid in the snow. I looked under the truck and on the bottom of the tranny pan there was fluid all over it. I checked the fluid level it is at the add mark. What could be the problem?
Without looking kind of hard to diagnose.

Could be anything from seals, cooler line connections, to a pan gasket. Start with the pan gasket. See if any of the bolts are loose. Take a flashlight and inspect all the areas above the pan gasket. This might show you if a case line is leaking or other.

If the is no indication of fluid above the pan, I would change the pan gasket.
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Old Dec 18, 2009 | 01:53 PM
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From: Spokane Valley / Thompson Falls, MT.
Make sure its tranny fluid and not coolant.
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Old Dec 18, 2009 | 04:30 PM
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From: Streator Illinois
If it is the tranny pan gasket, might I suggest the Mopar reusable unit?

I used to have a heck of a time keeping mine sealed up, replaced it with the sandwiched Mopar one and no problems since. They are bloody expensive, but worth it IMHO.
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