Investigating the rear axle issue & a potential fix for the LEGO Technic 42129 Mercedes-Benz Zetros

As I mentioned in my previous video, the LEGO Technic 42129 4x4 Mercedes-Benz Zetros Trial Truck seems to have a problem with its rear axle. Under constant heavy load pushing the truck beyond its limits, a 5L beam that holds the gear driving the rear differential gets pushed out a little bit, and as a result the gears start to crack and might get damaged on a longer term.
In this video I show you the problem in details, investigate the causes and test a potential fix.
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