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4r70w check balls(jmod)

Discussion in 'SN-95 and New Edge Mustangs' started by keith89, Sep 18, 2019.

  1. keith89

    keith89 Well-Known Member Established Member

    Mar 29, 2007
    Wood-Ridge, NJ
    I'm planning to do the jmod this weekend and was wondering what causes the check balls to go bad. The car has a trans cooler and trans fluid tends to run at 170-180 degrees. There's 95k miles on the trans and fluid/filter have been changed at least once before. I'm just wondering if I should order a set of check balls and delay the mod just in case before i pull the valve body since I have to do it in one afternoon.

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