Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Fluid - Differential






Front Axle

181 FBI (Model 30)
Normal Use Mopar Gear Lubricant 80W-90
Trailer Towing Mopar Synthetic Gear Lubricant 75W-140

216 FBI (Model 44)
Normal Use Mopar Gear Lubricant 80W-90
Trailer Towing Mopar Synthetic Gear Lubricant 75W-140

RUBICON 216 FBI (Model 44) Mopar Synthetic Gear Lubricant 75W-140

Rear Axle

194 RBI (Model 35)
Normal Use Mopar Gear Lubricant 80W-90
Trailer Towing Mopar Synthetic Gear Lubricant 75W-140

194 RBI (Model 35) 4.56 Ratio
2.4 L Engine/42 RLE Automatic Transmission Mopar Synthetic Gear Lubricant 75W-140

226 RBI (Model 44)
Normal Use Mopar Gear Lubricant 80W-90
Trailer Towing Mopar Synthetic Gear Lubricant 75W-140

RUBICON 226 RBI (Model 44) Mopar Synthetic Gear Lubricant 75W-140

NOTE: Trac-lok equipped axles require 4 oz. (118 ml) of Limited Slip Additive in the lubricant.