Typhon grom broke again

I'm starting to think I've brought a Friday model! Both diffs failed 2 weeks after purchase, now 1 month later the cooling fan has stopped and also the steering servo. I thought maybe it was esc/receiver but after plugging them into my other Typhon have verified it is in fact the servo and fan that don't work.

Anyone had these issues before? The store replaced the diffs under warranty but are yet to reply about the other issues.

The funny thing is both cars are driven at the same time in the same conditions yet the brushed car seems to be a pos.