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  • DODGE CUMMINS
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  • DODGE CUMMINS
  • FORD POWERSTROKE
  • GM DURAMAX
  • COMMERCIAL / INDUSTRIAL
  • CUMMINS CONVERSION PARTS
  • CPP GEAR
  • USED PARTS
  • SHOP BY BRAND

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    • DIFFERENTIAL AND DRIVETRAIN

    DIFFERENTIAL AND DRIVETRAIN — 2013–2018 DODGE RAM 6.7L CUMMINS

    Build a stronger driveline for work, towing, or play. This 2013–2018 Ram 2500/3500 6.7L Cummins collection covers diff covers, ring & pinion + master kits, lockers/LSDs, U-joints & yokes, and seals/breathers—all linked to live CPP Diesel product pages.

    Heavy-Duty Differential Covers (Cooling & Serviceability)

    Ring & Pinion + Master Install / Overhaul Kits

    Lockers & Limited-Slip

    U-Joints, Yokes, Seals & Breathers

    Fitment Notes:
    • Rear: 2013–2018 Ram HD models use AAM 11.5 (and some 3500s use 11.8). Choose covers/kits labeled 11.5/11.8 and verify ring-gear bolt pattern.
    • Front: 2014–2018 Ram 2500 uses AA12-9.25; 2013–2018 Ram 3500 uses a similar 9.25 housing. Front covers list “AA12-9.25.”
    • For 2014+ 11.5 axles running earlier small-bearing gearsets, use Yukon’s conversion overhaul kit.

    Related 13–18 Categories

    Frequently Asked Questions

    How do I know if I have an AAM 11.5 or 11.8 rear?
    Most 2013–2018 Ram HDs use the 11.5"; some 3500s (especially 2016+) use the 11.8". Check VIN/build data or ring-gear specs on the product page. Universal covers like the Banks 19259 fit both 11.5/11.8 14-bolt housings.
    Gear ratio tips for towing vs. performance?
    Lower (numerically higher) ratios like 4.56 improve acceleration and heavy-tow control. Ratios like 3.73 keep highway RPM lower.
    Do I need a master kit when changing gears?
    Yes—bearings, shims, bolts, sealant and hardware are critical. Use complete solutions like Yukon YKAAM11.5-D or USA Standard ZGK kits.
    LSD vs. locker—what’s best for my truck?
    An LSD like Yukon Dura Grip improves street manners and traction for towing/daily use. A locker like the Grizzly gives maximum traction for off-road and competition.
    Any other drivetrain upgrades to consider?
    For hard launches or heavy towing, add traction bars to control axle wrap. Always pair fresh gears with quality fluid and break-in.
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