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Peterbilt manufactures class eight vehicles. A "rear end" is a common term used by truck drivers and mechanics to mean a rear axle and differential. Peterbilt trucks are built using parts from a variety of vendors and the axles are no exception. Determining what brand axle a Peterbilt was built with will help the owner in determining part identification for repairs.
Step 1
Crawl under the forward-rear axle of the truck using the creeper. Position yourself under the passenger side axle shaft.
Step 2
Spray brake cleaner onto the shaft to loosen dirt and grease. Wipe the axle shaft clean with a shop towel or old rag.
Step 3
Locate the numbers that are stamped into the metal on the rear side of the axle shaft. Write the axle specification number on a piece of paper.
Step 4
Position the creeper underneath the left side of the forward-rear axle.
Step 5
Spray brake cleaner onto the axle-shaft and wipe clean with a shop towel or old rag.
Step 6
Locate the identification tag on the forward side of the axle-shaft. Write the identification number on a piece of paper.
Step 7
Position yourself over the differential on the forward-rear axle by leaning over the frame.
Step 8
Spray brake cleaner onto the top of the differential housing. Wipe clean with a shop towel or old rag.
Step 9
Locate the differential identification numbers which are either on a metallic tag or stamped on the top of the housing. Write the numbers down on a piece of paper.
Repeat the steps on the rear-rear axle if necessary.
Items you will need
- Flashlight
- Brake cleaner
- Shop towel or old rag
- Creeper
- Vehicle identification number (VIN)
