Is it really that XLT's are different, or is that the chaincase changed? All Indy 500's up until 1992 had the one piece chaincase brake assembly without a drain plug or a dipstick. All Indy 500's 1993+ adopted the later style chaincase with the caliper able to be removed from the top of the chaincase, a drain plug, and a dipstick. I just assumed all Polaris sleds changed over at the same time. My 1996 Indy 500 has the new style.