[My dream rig]

Hello all, hope y’all having a nice weekend. Would replacing my front diff breather tube with a new and improved one (became available in 2009) make my slight diff whine, that is heard when I gently press the gas pedal, go away? It’s an 05 4.2 v8 with 180k miles on the clock. Thank you all in advance.

 

[RRToadHall]

Highly unlikely. The breather tube is there strictly for expansion of the fluid and to keep water out. It is nothing more than a passive vent. If you diff whine you something else going on. When was your fluid changed?

 

[My dream rig]

Thanks for the reply. The diff fluid was changed in January 2015 and since then I’ve only put on about 25k miles. Thanks again.

 

[RRToadHall]

The only way a breather tube could cause any issue is if it were plugged. The issue would be leaking seals due to heat expansion.