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

System Specifications

TYPE & VISCOSITY
To determine if a differential is a standard type or a limited-slip type, check axle code listed on label on door lock pillar. Standard Axle Codes -- consist of TWO NUMBERS Limited-Slip Axle Codes -- will consist of ONE LETTER and ONE NUMBER
Standard
Ford part number F1TZ-19580-B
Synthetic 75W-140
Limited Slip
Ford part number F1TZ-19580-B
Synthetic 75W-140
CAPACITY
Fill no higher than 1/4 inch to 9/16 inch below fill plug.
5.5
Friction Modifier C8AZ-19B956-A 4