Took my 2005 AWD Highlander for 95,000 routine servicing. Was told/shown that there's a leak of the gasket between the transfer case and transmission. Part is about $6, but labor is "around 15 hours, because we have to completely remove the transmission and exhaust system to get to the gasket". Ft Myers FL Toyota's total estimate is $1710 plus sales tax, which I declined. The Owner's manual doesn't show any way to check fluid levels in the transmission or transfer case. Anyone have suggestions? I intend to keep the vehicle for several more years. Thanks.