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Everything voids warranties. If you are driving a new car, ie one still under warrantee, then you have to do whatever they want you to do. But there are lots o

Everything voids warranties. If you are driving a new car, ie one still under warrantee, then you have to do whatever they want you to do. But there are lots of little myths about fixing cars, stuff leveraged by mechanics. Telling people that a diff will "blow" should the tires be 0.1% different in size is one of those myths. The entire purpose of a diff is to allow wheels to turn at different rates, hence the name differential. Only when you are getting towards differences enough to trigger anti-slip mechanisms during normal driving would it become an issue. The manual probably also says that aftermarket oil/air filters will void warrantees, or that changing your own brake pads is dangerous. Total bunk.

legitster 3y ago
Most AWDs use a central diff for all four wheels. It's for distributing different amounts of torque front and back. It's not quite the same as a 2WD or 4WD differential(s) that only handle left/right. It's not at all the same as just a big open differential. A central diff compensating for front/back distribution while also handling a constant mismatched load on one side is definitely going to mess it up. If it's your car feel free to try it and tell me if you get a bunch of dash lights from your AWD computer. > The manual probably also says that aftermarket oil/air filters will void warrantees, or that changing your own brake pads is dangerous. If your manual actually says this I will eat my hat. It's literally illegal in the US: https://en.wikipedia.org/wiki/Magnuson%E2%80%93Moss_Warranty_Act https://en.wikipedia.org/wiki/Magnuson%E2%80%93Moss_Warranty...