Unimog Club UK

Just read your post Bart, funny enough your 404 is the only Mog that can suffer from high speed fatigue keep an eye on hub temps and gearbox temp basically you have a 411 gearbox with twice the revs also your hubs are early tech so the odd high speed run would be fine but if you were to do a lot of high speed work go fully synthetic or change your oil regularly, the later option if you like to do a lot of wading 
Moose