peakbagger
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FYI, While roaming other Unimog websites a known crops up about the front portal axles losing fluid. Its reportedly an issue with Military Mogs of the 406 vintage and going on into the later SBUs, including the SEE. There is a possibility that the front portal boxes will slowly pump their fluid into the differential housing which will lead to the fluid getting low in the portal boxes and eventually portal gear damage. It seems to occur mostly on units run at road speeds so this may not be applicable to those using SEEs at low speed. There are a couple of choices for a fix, the no cost one is check the portal axle fluid level frequently if used at road speed, or the permanent fix is to install modified breather tube assembly's that separate the gearlube in the vent tube and reintroduce it back to the portal box. Vons Mogs and Expedition imports both carry modification kits and I expect someone willing to chase parts with the capability to braze tubing could duplicate a similar system. I plan to install modified breather tubes on my 1300 but will probably just keep an eye on the fluid level of my SEE.