4WD RAM 1500 2021 Owner's Guide

478TECHNICAL SPECIFICATIONS
CHASSIS FLUIDS AND LUBRICANTS
Component Fluid, Lubricant, or Genuine Part
Automatic TransmissionUse only Mopar ZF 8&9 Speed ATF Automatic Transmission Fluid, or equivalent. Failure to use
the correct fluid may affect the function or performance of your transmission.
Transfer Case – 48-11 Active On-Demand 2–speed
Transfer Case (With 4WD AUTO) We recommend you use Mobil Fluid LT.
Transfer Case – 48-12 Part Time 2–Speed Transfer
Case (Without 4WD AUTO) We recommend you use Shell Spirax S2 ATF A389.
Front Axle We recommend you use Mopar GL-5 Synthetic Axle Lubricant SAE 75W-85.
Rear Axle (3.21/3.55) We recommend you use Mopar Synthetic Gear Lubricant SAE 75W-90 (MS-A0160).
Limited-Slip Rear Axles require the addition of 5 oz. (148 ml) Mopar Limited Slip Additive
(MS-10111).
Rear Axle (3.92) We recommend you use Mopar Synthetic Gear Lubricant SAE 75W-140 (MS-8985).
Limited-Slip Rear Axles require the addition of 5 oz. (148 ml) Mopar Limited Slip Additive
(MS-10111).
Max Tow Rear Axle (3.92) We recommend You Use Dana SAE 80W90 Axle Lubricant.
Brake Master Cylinder We recommend you use Mopar DOT 3 Brake Fluid, SAE J1709.

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