One problem related to transfer case has been reported for the 1999 Lexus RX. The most recently reported issues are listed below.
Even though having all major service performed by the Lexus dealer, plus having the transmission fluid and filter changed twice, the transmission failed and needs replacing at a high cost. I am aware of hundreds of others who have had similar problems with the Rx300 there is only 69,930 miles on this Lexus and has been very well maintained this is my first and last Lexus/Toyota as Lexus/Toyota don't take care of there customers they no of this very big problem and they do nothing I don't see why there is not a class action lawsuit like the motor sludge / oil gel class action settlement I will stick to american made cars not only does it cost less to repair them they last longer then 69,000 miles like this Lexus piece of !@#$% I now have to pay $6200. 00 to fix and the extended warranty I bought at the time if sale of the Lexus don't cover crap.