This is my 1st post(newbie).But am the proud owner of 3 landcrushers.95'-98' and 2004 landcruiser.I will own and operate nothing less. Now for the question,on my 98 landcruiser during the operation of the vehicles air canditioner ,it produces 1 helluva sound.Sounds like pipes whining.The sound lasts for about 2 to 3 seconds and occurs about every 10 to 20 mins of it's operation.Any input and or info would be greatly appreciated.Thank you and loooooong live the LANDCRUISER.....PS.This site is extremely helpful.Im glad i found it.