Product overview and installation of Durobump Rear Bump Stops on a 5th Gen 4Runner
You have just upgraded your suspension with a mild 2-inch lift and are ready to hit the trail.
Your confidence is high as you find some dirt, diving into corners, taking small rock sections with ease.
Then a sneaky whoop comes out from nowhere and you find yourself at the limit of your up-travel and square against the stock bump stops that you didn’t upgrade to match the lift.
The jolt is abrupt and quick to deflate your gained confidence.
Thankfully you are not alone, and Durobumps has your back.
Their team has developed a number of bump stop solutions specifically for Toyota vehicles, including the 5th gen 4Runner, including the front bump stops along with the rears.
Here we will show how to install their rear bump stops on your 4Runner to help gain your confidence back on the trail!
About the product
What’s in the box:
- (2) 4.25” Durobumps
- (4) JIS 10.9 corrosion-resistant bolts and washers
- Single-use blue thread locker
- Set of instructions
These Durobump Rear Bump Stops are designed for 5th gen 4Runners with a 2+” lift kit.
At 4.25” tall, they are specifically made for non-long travel builds, but can be used with a number of stock or extended travel, lifted applications.
They are made in the USA from a Dual Durometer Rubber that allows for a progressive compression cycle when the axle is deep into its up-travel.
This leaves the driver with a “smooth as butter” feeling from the driver’s seat when they encounter that sneaky whoop.
As a bonus, this increased bump stop length doesn’t hinder up-travel as the compound is designed to compress enough to match up-travel with a stock bump stop.
What you’ll need
- Hydraulic jack
- (2) Jack stands
- Your tool of choice for removing lug nuts (21mm)
- 12mm socket
- Ratchet extensions
- Torque wrench
- Damp cloth
Step 1: Jack Truck and & Place on Jack Stands
To start, set your jack under the rear differential and raise it so it’s snug to the axle. Then starting on one side, loosen the lug nuts. Follow that with the other side before lifting the rear tires off the ground an inch or so with the jack. Set your jack stands under the axle on both sides, for safety. Remove the lug nuts completely followed by each tire.
Step 2: Remove the rear bump stops with the 2 downward-facing bolts
With the rear wheel wells exposed, pick a side to start on and grab the 12mm socket and ratchet. Remove the rear bump stops with the 2 downward-facing bolts. If you have a remote reservoir bracket that uses these holes for mounting, be sure to support the bracket and reservoir when removing the bolts.
Step 3: Clean all points of contact
With the stock bump stops (and suspension components) out of the way, clean all points of contact with your damp cloth to eliminate any debris on the surfaces.
Then using the small tube provided, apply a small amount of thread locker onto each bolt and set them aside close by.
Step 4: Install the Bump Stops
Both bump stops are labeled Driver and Passenger for your convenience. Grab the appropriate one for the side you are working on and orient it so that the “notch” points to the outside, rear of the vehicle as shown in the photo.
With the bump stop (and any suspension components) held in place, grab a near-by prepped bolt and thread it through the bump stop and into the welded nut on the mount.
Thread it on a few turns before grabbing the other bolt and doing the same on the other side of the bump stop.
With the 12mm socket, extension and ratchet, tighten the two bolts until they are snug to the bump stop and there is no gap between it and the frame mount. If you tighten it too far, the bump stop will start to bulge. If this happens, back the bolt out until it is no longer deformed.
With the bump stop installed, double-check your orientation by looking to see if the bottom of the bump stop is lined up with the top of the axle tubing.
Repeat the same process on the other side.
Mount each wheel, and finger tighten the lug nuts. After removing the jack stands and lowering the 4Runner with the jack, in a cross pattern tighten each lug nut to 85lb/ft using a torque wrench.
That’s it! You are now equipped to take the trail with comfort and confidence.
Rear Durobump Bump Stops Review
I have had both the front and rear Durobump sets installed on the 4Runner for the last few trips that I have been on.
Before that I was on the stock bump stops with no spacers.
The difference in feeling at the wheel is night and day. The instinctive reaction to wince when going over larger bumps fades away as the Durobumps take the jolt out of the picture.
They provide a smooth and progressive “bottom” to the suspension cycle which inspires confidence when on the trail.
I am very happy to have done this simple upgrade given how much they do to improve overall suspension feel and would recommend them to anyone with a mild lift on their 4Runner.
For more information on the Durobump kits available for the 5th gen 4Runner, click here.