A transmission fluid leak may be noted from the area of the 13 pin electrical connector. Replacing the guide bushing and o-ring seal should correct this issue.Google+
Car Problem Reports
Dodge Sprinter 2500 Transmission Fluid Leak
Dodge Sprinter 2500 Problem
Average Mileage: 155,139 mi (94,000 mi - 185,000 mi)
Visitor, 2004 Dodge Sprinter 2500, 178,000 mi
Transmission O-Ring at sensor leaking for second time. How does this dude come out?
Visitor, 2005 Dodge Sprinter 2500, 185,000 mi
This is the problem we have. Should be able to make repairs. No way to check and add fluid that I can see.
Is this true?
Visitor, 2004 Dodge Sprinter 2500, 94,000 mi
Visitor, 2005 Dodge Sprinter 2500, 163,556 mi
Small leak, don't know for how long. From forums it could be the electrical connector