Yep exactly, there was a prang in Tauranga like this a while back, the truck skidded down a grass hill with alternative wheels rolling and skidding... There should at a minimum be a limited slip diff or similar on those setups. Or a driver that knows they cannot leave the cab or must fit a hold-down to the brake pedal if the have to park on unformed surfaces and get out and leave the truck...
Where the damage risk on testing them on the rollers is on the dynamic reversal on the driveshaft pinions - very correct in saying that that is not what they do in real life. Although if they do explode something on the rollers likely the setup was not warrantable anyway.
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