Differential Bushings Installation Instructions

How to Install Your Front Differential Bracket Bushings: 3rd Gen 4Runner, 1st Gen Tacoma & 1st Gen Tundra DBBUS1

NOTE: Do not remove the metal sleeve from the bracket. Only the rubber itself is removed.   

Step 1. Remove Skid Plates

Remove any skid plates needed to access the two mounting brackets on the front of the diff.

Step 2. Remove three Driver Side Differential Mounting Bracket bolts.

Remove the three mounting bolts from the driver side front differential bracket.

Step 2A. Remove two Passenger Side Differential Mounting Bracket Bolts.

Remove the two 19mm mounting bolts on the passenger side.

Step 2B. Remove 19mm Bolt

Next, remove the long 19mm bolt that goes through the front of the diff bracket and frame of the truck using a 19mm socket and 19mm wrench to hold the nut located just above the frame. The diff will stay in place. It doesn’t fall out or anything, just slightly sags.

Step 3. Remove Old Bushings

Now it’s time to remove the old bushing from your brackets. The differential bracket has a steel sleeve that’s pressed in, and it will remain in place. We are only removing the old worn rubber bushing. Heat the metal around the bushing with a torch (propane, acetylene, etc.) until it starts to snap, crackle, and pop. This sound is indicating that the rubber has separated from the metal sleeve. Continue to heat the metal around the bushing until the bushing can be pushed out with a screwdriver.

Step 4. Clean and prepare bracket for new bushing

Once the old bushing is removed, torch any remaining rubber left in the metal sleeve of the bracket and scrape off any debris. This would be a good time to paint the brackets (adds 5 hp).

Step 5. Press New Bushings into Brackets

Now it’s time to press your new bushing into your clean diff mount brackets. The new bushings are slightly larger in diameter than the diff bracket sleeve. Protect the top of the diff bushing with a rag or piece of cardboard and use a pair of channel-locks to squeeze the new bushings in place. Do not use a hammer to install the bushings. Dawn dish soap or hair spray (like Aqua Net) can be used to lubricate the new bushing to help aid in easy installation. Reassemble brackets to the diff and your done.




Toyota FSM torque specs:

  • Long front bolts that mount to the frame: 101 ft. lbs.
  • Five 19 mm bolts that mount to diff housing are 116 ft. lbs.
  • There is also an install write up with pictures on wwwDuroBumps.com


Now go hit some trails or cruise the mall … whatever you’re into!