DoctorDiff Drivetrain Components

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489 Case
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8 3/4" Nodular Iron Casting

$275.00

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New, Mopar 8 3/4" nodular iron 489 casting includes forged steel caps and billet steel adjusters. Upgrade to super-duty version with HD steel caps for $5.

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8 3/4" Helical Gear Sure-Grip ("Sure-Trac II")
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DoctorDiff Sure-Trac II is a fully machined, forged steel 8.75" differential with helical worm gears similar to an Eaton True-Trac.
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