blackrx330

Although the dealer did the TSB fix awhile ago and it fixed the problem, the noise is coming back. It's the thump sound you get when decelerating....transmission cooler lines. Here's the technically info:

TC002-04 - Driveline Thump During Deceleration
Serial Numbers: 2WD - Japan 31105; 4WD - Japan 59251
Some vehicles make a groaning or humming noise decelerating from 50 MPH to lower speeds; this noise is most apparent decelerating in 4th gear. Other vehicles may make a thumping noise while decelerating at about 30 MPH, or when lightly accelerating around 55 MPH.
The fix is to replace one of the trans oil cooler hoses with a re-designed version.

I'm looking for a DIY TSB on this problem so hopefully I can buy the parts from the dealer and fix the problem myself. If there's anyone that have the instructions on this specific TSB, I would greatly appreciate it. Thanks in advance.

MC Wong

I don't think there is a fix for this. I had my transfer case replaced with regards to the same thump but I still experience it once in a while as well as rough gear changes. So far my case has gone to Lexus Australia but nothing has been done.