Thank you for the replies. I wondered if it had anything to do with offroad wear/tear. I didn't notice any leaks or performance drop off, so needing a replacement was a bit surprising. Luckily the cost is being covered under warranty.
Has anyone else needed to replace their steering rack? 90,000 miles on my 2011 SR5 and dealer is replacing the rack, saying it's leaking fluid from the boots. Doesn't seem like a common issue, just curious. Thanks.