How to Find Out What Rear End My Peterbilt Has


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.

Things You'll Need

  • Flashlight
  • Brake cleaner
  • Shop towel or old rag
  • Creeper
  • Vehicle identification number (VIN)
  • Crawl under the forward-rear axle of the truck using the creeper. Position yourself under the passenger side axle shaft.

  • Spray brake cleaner onto the shaft to loosen dirt and grease. Wipe the axle shaft clean with a shop towel or old rag.

  • 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.

  • Position the creeper underneath the left side of the forward-rear axle.

  • Spray brake cleaner onto the axle-shaft and wipe clean with a shop towel or old rag.

  • Locate the identification tag on the forward side of the axle-shaft. Write the identification number on a piece of paper.

  • Position yourself over the differential on the forward-rear axle by leaning over the frame.

  • Spray brake cleaner onto the top of the differential housing. Wipe clean with a shop towel or old rag.

  • 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.

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