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  1. #1

    Default Sonoma front axle question

    I used Auto-Rx in the front axel of my Sonoma (4WD) and then topped off the gear oil. This is my first 4WD. What happens in the front axel when you are operating in 2WD? Is there movement going on? In order for the Auto-Rx to work, things must be in motion to circulate the gear oil. Thanks in advance!

  2. #2
    Jr. Engineer Gmcsuvguy's Avatar
    Join Date
    Dec 2007
    Alberta, Canada


    There will be fluid movement in the differential when in 2wd. There is always oil "splash" to lubricate the bearings.
    Ken Beida
    2010 GMC Sierra Crew Cab 4X4, 5.3L
    2009 GMC Sierra Denali, 6.2L = 403hp, AWD, Full load

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