I thought I was going crazy listening to my truck! I bought an 06 access cab 2WD Prerunner. One and a half weeks later, I bring my '86 4Runner 4X4 in for service and the 4runner blows a heater hose! Well, now I need a ride home. While I wait, I see the cherry red, full 4 door, 4X4 tacoma I really wanted. Well, needless to say, the new 4X4 I just bought has 500 miles on it and I start hearing this ticking noise. Now I know what it is and how to fix it..Thanks guys!