Originally Posted by ChuckW
Recently I was under our 2017 Seneca working on an issue with our leveling system. While there I observed that the Rear Differential Bell Housing was wet, and that there were droplets of lube on the bottom side.
Today I took her into my local Freightliner dealer/service center for inspection/repair.
This afternoon I received a call from the service adviser confirming that the differential is indeed leaking. To reseal it he explained that both rear axles will be removed, and the entire axle housing will have to be dropped from the chassis. He said that this is not common, but not unheard of either.
It might be a good idea to check for this the next time you are under your coach.
Fortunately we are still under warranty.
This is on the M2 chassis.
A warning all M2 Seneca owners need to heed!
Not a new issue unfortunately, I had to have mine repaired exactly as you stated and there was at least one other Seneca owner who had their's repaired. The rear differential carrier is sealed to the axle housing with silicone sealer (no gasket) and the factory must have had some bad sealer or difficulty in applying it properly.
My local Freightliner dealer went out of their way trying to convince Freightliner Corporation to cover my repairs despite me being out of warranty time-wise. They were unsuccessful, but they did discount my repair significantly. It is dry as a bone now!