itsJC Posted September 7, 2022 Share Posted September 7, 2022 I have a brand new 2023 Mack Anthem. For some reason, when I pull out my tractor and trailer brake valves there is a really loud air squealing noise. It sounds like it's coming from the tractor. Any ideas? Quote Link to comment Share on other sites More sharing options...
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.