CM 870 turbo

[Wiseman]

That’s the primary reason for this miserable failure. Lugging is your best friend when something had to be destroyed . It takes time but is inevitable. Way to much oscillating load applied to parts will cause fatigue and structural disintegration.
That’s why we constantly nagging to keep RPMs above 1500 under full load during acceleration or steep uphill.
Guess this doesn’t helps a lot , but’s something to think about.