E 350 Van V8-7.3L DSL (1988)
Wheel Hub: All Technical Service Bulletins
Full Float Rear Hub/Shaft - Lubricant Leaks
Article No.
93-25-14
12/08/93
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AXLE - "DANA" FULL FLOAT REAR - NEW HUB/SHAFT BOLTS AND REVISED TORQUE SPECIFICATIONS
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AXLE - "DANA" FULL FLOAT REAR - SHAFT/HUB BOLTS LOOSEN AND LEAK AXLE LUBE - SERVICE TIPS
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LEAKS - AXLE LUBE - REAR AXLE SHAFT/HUB BOLTS LOOSEN - SERVICE TIPS
LIGHT TRUCK:
1980-94 E-350
1988-94 F SUPER DUTY
ISSUE:
The rear axle shaft/hub bolts may loosen and leak axle lube. This loosening can occur due to increased torques at the rear wheels.
ACTION:
Install new higher strength flange head bolts and improved cellulose gaskets, which clamp the joint together tighter. Refer to the following service tips
and revised torque specifications.
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Do not use higher torques specified for these bolts on previously specified hex head bolts.
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Always replace the bolts and gaskets together rather than reusing them when servicing the wheel end.
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The new cellulose gaskets and new flanged head bolts are designed to be used together; therefore, neither part should be used with older stock parts.
NOTE:
WHEN REMOVING THE BOLTS, LOOSEN THEM BY HAND BEFORE USING AN IMPACT WRENCH. THE SHOCK LOAD APPLIED BY A
POWER TOOL MAY CAUSE THE BOLT TO SNAP BEFORE IT RELEASES.
NOTE:
WHEN SERVICING THE REAR AXLE HUB OR SHAFT, REPLACE THE BOLTS AND GASKET WITH THE NEW PARTS. USE THE NEW
TORQUE SPECIFICATIONS.
NOTE:
SPECIAL LUBRICANTS ARE REQUIRED FOR DANA FULL FLOAT REAR AXLES. USE FORD HYPOID GEAR LUBE (C6AZ-19580-E OR
EQUIVALENT), OR FOR EXTREME SERVICE APPLICATIONS, USE FORD HIGH PERFORMANCE REAR AXLE LUBE (F1TZ-19580-B OR
EQUIVALENT). REFER TO TSB 92-3-11 FOR ADDITIONAL LUBRICANT INFORMATION.
