Pinpoint Test B: Axle Overheating
WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
- Normal Operation and Fault Conditions
REFER to: Rear Drive Axle and Differential .
Possible Sources
- Axle lubricant low
- Incorrect or contaminated lubricant type
- Bearing preload adjusted too tight
- Excessive gear wear
- Incorrect ring gear backlash
- B1 CHECK AXLE LUBRICANT LEVEL
- Check the lubricant level.
Is the lubricant level low?
Yes REFER to: Differential Fluid Level Check . No GO to B2 - B2 CHECK AXLE CONDITION
- Inspect the axle for damage.
- Inspect axle lubricant.
Was damage found?
Yes Repair as necessary. Clean and Refill the axle to specification as necessary. REFER to: Specifications . No GO to B3 - B3 INSPECT THE RING AND PINION GEAR
- Check the ring and pinion for damage.
Does the ring and pinion have a wear pattern?
Yes Adjust the preload as necessary. REFER to: Drive Pinion . No GO to B4 - B4 INSPECT ALL THE AXLE GEARS FOR WEAR OR DAMAGE
- Inspect all the axle gears for wear or damage.
Was wear or damage found?
Yes Install new components as necessary. REFER to: Drive Pinion . REFER to: Differential Carrier . No GO to B5 - B5 INSPECT THE RING GEAR FOR SCORING
- Inspect the ring gear for scoring.
Was a wear pattern found on the ring and pinion?
Yes REFER to: Ring Gear Backlash Adjustment . No Inspect the vehicle for any other symptoms related to the axle.