Good call. Sidewall damage is a safety risk, esp since internal damage (likely in this case) is not visible.I am just getting it replaced. No sense in risking it.
I think this used to be the case, but is not true for most vehicles with all-wheel drive today. At most, it will cause slightly more wear in the differential when using 4-wheel hi or lowjust keep in mind that when you replace just one tire on a 4x4 power train that the tread depth on the other tires must be over 6/32 if not you can cause damage to your transmission. Being in th entire business for a lot of years you must make sure that you have the proper tread depth. I have seen this happen on several occasions over the years. Do yourself a favour and take it to a reputable tire dealer and they will explain how it works. As far as your tire goes, the sidewall is compromised and you can be assured that if you leave it on that it will blow out.