Symptom Chart - Driveline

WARNING: This page is about a different car, the 2013 Ford F-550 Super Duty, 2013 Ford F-450 Super Duty, 2013 Ford F-350 Super Duty, and 2013 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

SYMPTOM CHART - DRIVELINE

Condition	Possible Sources	Action
Electronic Locking Differential (ELD) does not engage in snow, mud or on ice	Mode switch Differential Transfer Case Control Module (TCCM) Wiring	REFER to FOUR WHEEL DRIVE (4WD) SYSTEMS .
Tractech®, Truetrac® does not work in snow, mud or in ice	Differential	CARRY OUT the DIFFERENTIAL CHECK - TRACTECH® TRUETRAC® ROAD TEST (DANA) . REPAIR as necessary.
Lubricant leaking from the pinion seal, axle shaft oil seals	Vent	CLEAN the differential housing vent and the vent hose.
	Damage in the seal contact area	INSTALL a new seal and mating surface if damage is found.
Front axle will not engage	Switches Wiring 4X4 control module Shift motor Vacuum application	REFER to FOUR WHEEL DRIVE (4WD) SYSTEMS .
Front axle will not disengage	Switches Wiring 4X4 control module Shift motor Vacuum application	REFER to FOUR WHEEL DRIVE (4WD) SYSTEMS .
Differential side gears/pinion gears are scored	Insufficient lubrication	INSTALL new gears. REFER to REAR DRIVE AXLE/DIFFERENTIAL - DANA 80 , REAR DRIVE AXLE/DIFFERENTIAL - DANA S110 AND S130 , REAR DRIVE AXLE/DIFFERENTIAL - FORD 10.50-INCH RING GEAR or FRONT DRIVE AXLE/DIFFERENTIAL . CLEAN and FILL the axle to specification with the correct lubricant.
Differential side gears/pinion gears are scored	Incorrect or contaminated lubricant type	INSTALL new gears. REFER to REAR DRIVE AXLE/DIFFERENTIAL - DANA 80 , REAR DRIVE AXLE/DIFFERENTIAL - DANA S110 AND S130 , REAR DRIVE AXLE/DIFFERENTIAL - FORD 10.50-INCH RING GEAR or FRONT DRIVE AXLE/DIFFERENTIAL . CLEAN and FILL the axle to specification with the correct lubricant.
Axle overheating	Lubricant level too low	CHECK the lubricant level. FILL the axle to specification.
	Incorrect or contaminated lubricant type	INSPECT the axle for damage. REPAIR as necessary. CLEAN and FILL the axle to specification.
	Bearing preloads too high	CHECK the ring and pinion for damage. INSPECT the ring and pinion wear pattern. ADJUST the preload as necessary.
	Excessive gear wear	INSPECT all the axle gears for wear or damage. INSTALL new components as necessary.
	Incorrect ring gear backlash	INSPECT the ring gear for scoring. INSPECT the ring and pinion wear pattern. ADJUST the ring gear backlash as necessary.
Broken gear teeth on the ring gear or pinion	Overloading the vehicle	INSTALL a new ring and pinion. REFER to REAR DRIVE AXLE/DIFFERENTIAL - DANA 80 , REAR DRIVE AXLE/DIFFERENTIAL - DANA S110 AND S130 , REAR DRIVE AXLE/DIFFERENTIAL - FORD 10.50-INCH RING GEAR . or FRONT DRIVE AXLE/DIFFERENTIAL .
Axle shaft broken	Overload the vehicle	INSTALL a new axle shaft. REFER to WHEEL HUBS AND BEARINGS - FULL FLOATING AXLE - DANA , REAR DRIVE AXLE/DIFFERENTIAL - FORD 10.50-INCH RING GEAR , WHEEL HUBS AND BEARINGS - FULL FLOATING AXLE - FORD or FRONT DRIVE AXLE/DIFFERENTIAL .
Axle shaft broken	Misaligned axle shaft tube	INSPECT the axle for damage. CHECK axle shaft tube alignment. INSTALL a new axle shaft. REFER to WHEEL HUBS AND BEARINGS - FULL FLOATING AXLE - DANA , REAR DRIVE AXLE/DIFFERENTIAL - FORD 10.50-INCH RING GEAR , WHEEL HUBS AND BEARINGS - FULL FLOATING AXLE - FORD or FRONT DRIVE AXLE/DIFFERENTIAL .