A place for more technical discussions. Please make sure you post in the correct section on the site, this way it keeps the site tidy AND ensures you get a more relevant answer.
I have an AT JB74 for about 3 years now with 60,000Km/37,000Mi.
My rear differential making a humming ("whoOomwhoOomwhoOom") sound everytime I cruise (AT on 4th) on 1500 RPM 60 Kmh/37 Mph and 3000 RPM 100 Kmh/60 Mph, but it's not there if I turn off O/D and use 3rd and match those RPMs. I think it might be the 4th gear group. The shop hasn´t resolved the issue and it's been there since year 1.
We use cookies to give you the best online experience. Please let us know if you agree to all of these cookies. Accepting the Cookies also accepts the Disclaimers for the website.
Essential Always on
Necessary for the operation of the website. These cookies cannot be disabled.
Functional
Enable convenient features and the storing of preferences.
Statistics
Help us understand how visitors use the website (audience measurement).
Marketing
Used for advertising and tracking visitors across websites.
