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360 Loud differential noise

Discussion in '360/430' started by pgalvani, Apr 28, 2025.

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  1. pgalvani

    pgalvani Rookie

    Oct 17, 2014
    2
    #1 pgalvani, Apr 28, 2025
    2000 360 with 18000 miles. Suddenly have a loud, clunking differential noise whenever I turn steering wheel full left or right. What to do? Change the oil? Someone recommended a differential friction modifier and limited slip lubricant by A.C. Delco. Thoughts?
     
  2. flash32

    flash32 F1 Veteran

    Aug 22, 2008
    6,677
    Central NJ
    Full Name:
    Dominick
    #2 flash32, Apr 28, 2025
    Last edited: Apr 28, 2025
    Check the oil for coolant first , and make sure level is ok
    I would then change the fluid and put in Ravenol VSG in - also cleaning filter

    I assume you narrowed it down to transmission / diff and not half axle issue etc

    If not look there as well
     
  3. EastMemphis

    EastMemphis Formula 3
    Owner Silver Subscribed

    May 25, 2019
    1,825
    Memphis, TN
    Full Name:
    John
    #3 EastMemphis, Apr 28, 2025
    Ya, simplest check: Look inside the coolent tank for oil. If you see a sheen, or actual oil, your heat exchanger just cost you a nice fortune.
     
  4. andrejwolk1975

    andrejwolk1975 Karting

    Feb 28, 2020
    106
    Italy
    Full Name:
    Andrea M
    #4 andrejwolk1975, Apr 28, 2025
    Don't drive around if eventually oil is present in the coolant reservoir. You could SEVERELY harm your transmission.
     
  5. pgalvani

    pgalvani Rookie

    Oct 17, 2014
    2
    #5 pgalvani, Apr 30, 2025 at 11:52 AM
    I started to check on the radiator fluid in the expansion tank to see if there was any oil in there and it was completely dry. Am about to buy some antifreeze (Shell), bring it up to temp then see. Thanks for the info
     
  6. flash32

    flash32 F1 Veteran

    Aug 22, 2008
    6,677
    Central NJ
    Full Name:
    Dominick
    #6 flash32, Apr 30, 2025 at 11:55 AM
    If coolant is empty .. i would definitely check gear oil .. it may be that all the coolant tis in there and you don't want to cause anymore damage
    If you read my post you quoted - I mention to check gear oil for coolant
    Check the gearbox oil ASAP
     
    grtoz and EastMemphis like this.

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