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4r100 vs 4r100hd

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  1. 99-03 7.3 Transmission Problems
    Hello, I have a 4R100 HD that was put in my truck at about 84K miles, when the factory 4R100 failed, I now have over 260K on the 4R100HD. I run a 6.0 cooler, Amsoil fluid and have added a external spin on filter. I was looking to see if anyone has experience with life expectancy of the HD...
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