Just had my truck in for an oil change at dealership and wanted them to check for oil leak seeing as I started getting drops on my driveway. When I pick up the truck they told me the front crank seal was leaking and possibly the rear main seal. Front was gonna be 650 bucks and the rear was gonna be 1020. Ended up taking truck to local diesel shop and they replaced front crank seal for 300 and said the rear main looked fine. Tech also told me the old seal looked worse than some that came out of engines with 3 times as many miles. Has anyone else with the 6.4 had this issue and will it be a recurring issue with this motor?

 

I had a front seal go bad on an 03 6.0 at under 25K, replacement is at 175K and still dry.