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2021 GMC Sierra 3500 HD

2021 GMC Sierra 3500 HD Differential Cases

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Differential Case - Direct Fit, Sold individually
Part Number: AC84756918
Guaranteed to Fit
$139.99
Vehicle Fitment
  • 2021 GMC Sierra 3500 HD AT4 All Engines 4-Door, Crew Cab Pickup, 4WD, 3.73R(GT4), 3.42 Ratio(GU6)
  • 2021 GMC Sierra 3500 HD SLT All Engines 4-Door, Crew Cab Pickup, 4WD, 3.73R(GT4), 3.42 Ratio(GU6)
  • 2021 GMC Sierra 3500 HD SLE All Engines 4-Door, Extended Cab Pickup, 4WD, 3.73R(GT4), 3.42 Ratio(GU6)
  • 2021 GMC Sierra 3500 HD Denali All Engines 4-Door, Crew Cab Pickup, 4WD, 3.73R(GT4), 3.42 Ratio(GU6)
  • 2021 GMC Sierra 3500 HD Base All Engines 4-Door, Extended Cab Pickup, 4WD, 3.73R(GT4), 3.42 Ratio(GU6)
Product Details
Location : FrontProduct Fit : Direct FitRecommended Use : OE ReplacementWarranty : 24-months or unlimited mile AC Delco limited warrantyQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

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Helpful Automotive Resources

Your Guide to How Spider Gears Work, Plus FAQs
Your Guide to How Spider Gears Work, Plus FAQsInside the differential case, there are two side gears and two pinion gears. The pinion gears are technically the spider gears, but many people simply refer to all four of the gears as spider gears. A spider gear is an example of a bevel gear that rotates around the differential case.