Seals & wheel bearings
A leaking axle seal or a growling wheel bearing is cheap to fix now and expensive to ignore. We track down where it is coming from, replace what has failed, and refill the axle with the right oil before it leaves.
Small parts that protect the expensive ones
Seals keep gear oil in and water and dirt out. Wheel bearings carry the full weight of the vehicle at every corner. Neither one costs much on its own, but each protects parts that do: a seal that leaks long enough starves the bearings and gears behind it, and a bearing that fails can take the hub, the axle shaft or the spindle with it.
Lifted trucks and Jeeps are harder on both. Bigger, heavier tires put more leverage on every wheel bearing, water crossings push seals past what they were built for, and trail dust works into anything that is already worn. Catching the first drip or the first hum is the difference between a routine repair and a tow.
The seals we replace
Most driveline leaks come from a handful of places. We clean the area, find the actual source — the drip is often lower than the leak — and replace the seal that failed.
Axle seals
Where the axle shaft leaves the housing. A failed one puts gear oil on the inside of the wheel, the brake parts and the tire — and oil on the brakes is a safety problem, not just a mess.
Pinion seals
At the front of the differential, where the driveshaft connects. A wet pinion is one of the most common leaks we see, especially on lifted trucks where driveline angles have changed.
Front inner axle seals
On solid front axles like the Jeep Dana 30 and 44, these seals sit inside the housing at the axle tubes. When they go, gear oil runs out toward the knuckles and the front axle runs low.
Transfer case output seals
Front and rear, where the driveshafts leave the transfer case. A leak here drains the transfer case slowly and often shows up as a wet driveshaft yoke.
Hub assemblies and serviceable bearings
Most late-model trucks, Jeeps and SUVs use a sealed hub assembly: the bearing, hub and often the ABS sensor ring come as one bolt-in unit, and when the bearing wears the whole assembly is replaced. Older vehicles and many heavy-duty axles use serviceable tapered bearings that are cleaned, inspected, repacked or replaced, then set to the correct preload.
Either way, the job is to confirm which bearing is actually bad before replacing anything. A worn tire, a loose ball joint or a bad U-joint can all sound or feel like a bearing, so we check play at the wheel, spin it by hand, and look at the rest of the front end at the same time.
Signs of a failing seal or bearing
Most of these show up gradually. If you notice one, it is worth having looked at before the next trip out.
| What you notice | Likely cause | Why it matters |
|---|---|---|
| Gear oil on the inside of a wheel or tire | Axle seal | Oil on the brakes reduces stopping power, and the axle runs low on oil |
| Wet, oily front of the differential | Pinion seal | A low differential wears the ring, pinion and bearings quickly |
| Drips under the transfer case or a wet driveshaft yoke | Transfer case output seal | A slow leak can run the transfer case low without warning |
| A growl or hum that rises with speed | Wheel bearing | Bearing noise gets worse, not better, and heat builds as it wears |
| Noise that changes when you turn one direction | Wheel bearing on the side being loaded | Helps us pin down which corner is worn |
| Play when you rock the top of the tire | Wheel bearing, or a worn ball joint | Loose wheels wear tires unevenly and affect steering |
| ABS or traction control light | Hub assembly with a failing sensor or tone ring | On many trucks the wheel-speed sensor is built into the hub |
| Milky gear oil after a water crossing | Water past a vent or a worn seal | Water-contaminated oil needs to come out before it damages bearings |
Fixed right, refilled right
Replacing an axle or pinion seal means draining the axle, so every seal job ends with a fresh fill of Red Line GL-5 gear oil, the same oil we use for gear service. If the old oil comes out milky or full of metal, we tell you what that means before anything else gets done.
Seal and bearing work is quoted by vehicle, because the parts and labor vary a lot between a bolt-in hub on a half-ton and a solid front axle on a Jeep. Call or text with your year, model and what you are seeing or hearing, and we will give you a clear quote before any work starts.
Seal & bearing repair
A clear quote once we know your vehicle and what it is doing. No work starts until you have approved it.
- Leak or noise diagnosis
- The failed seal or bearing
- Installation
- Fresh Red Line gear oil
- Front-end check while it’s apart
- Road test before pickup
Related services
Gear Service
Both differentials and the transfer case. Once a year for any vehicle that goes off-road.
View → 02Ball Joints
Worn joints can feel like a bad bearing. We check both whenever a wheel has play.
View → 03Diff Covers
A heavy-duty cover protects the differential you just resealed from the next rock.
View → 04Maintenance Packages
Every package includes a look at your seals and bearings on the lift.
View →Seals & wheel bearings FAQ
How do I know if a wheel bearing is going bad?
The most common sign is a growl or hum that gets louder with speed and often changes when you turn. You may also feel play when you rock the top of the tire, or see an ABS light on vehicles where the sensor is built into the hub. Bring it in and we will confirm which corner it is before replacing anything.
Can I keep driving on a noisy wheel bearing?
For a short time, but it only gets worse. A bearing that is noisy is already wearing, and as it goes it builds heat and play. In the worst case it can damage the hub or spindle. It is worth getting in soon, and before any long trip or trail run.
Is a leaking pinion or axle seal serious?
A slow seep is not an emergency, but it will not fix itself. The differential runs low over time, and low gear oil wears the bearings and gears quickly. An axle seal leak is more urgent because the oil can reach the brakes.
How much does seal or wheel bearing replacement cost?
It is quoted by vehicle. A bolt-in hub assembly on a half-ton is a very different job from a solid front axle on a Jeep. Call or text 970-509-5118 with your year, model and what you are noticing, and we will give you a quote before any work starts.
Should wheel bearings be replaced in pairs?
Not always. If one side has failed and the other side checks out, replacing just the bad one is often reasonable. On high-mileage vehicles or rigs running much larger tires, the other side is frequently close behind, and we will tell you honestly what we see.
My gear oil is milky after a water crossing. What now?
That means water got into the axle or transfer case, either past a vent or a worn seal. The oil should be changed soon, before the water damages the bearings. We will change it with gear service and check the seals while we are there.
Do bigger tires wear out wheel bearings faster?
Yes. Larger, heavier tires and wheels with more offset put more leverage on every wheel bearing. It is one of the reasons we check bearings as part of any lift or tire upgrade.
What customers say
5.0 from 46 Google reviews
Great guys! Met them by chance off a 4by4 form and go to them for my oil changes, change filters and run specials so watch for them. We joined their group on Facebook cant say enough about just good people.
I had brake pads, rotors, & wheel bearings replaced and brake lines flushed on a 1992 4 WD Toyota Pickup by Zach Adams, Owner | Off-Camber 4x4 Garage. I live in Hawaii and my son is living in Greeley attending college at FRCC. I contacted Zach by e-mail asking if he could do this work for me since other businesses would not work on the truck because of the year. Zach was very professional, helpful, and accommodating through the whole process. I highly recommend him for any 4x4 work !
Zach and Keith put new brake pads and rotors on my equinox in under 3 hours. They were kind and professional. I highly recommend Off-Camber 4x4 Garage for any work you need done on your vehicle.
My rear brakes were grinding. And I was worried about the bearings. So I took it in and they identified the problem and fixed it in just a few hours with new rotors brakes. I’ll be referring many people there. Great people great service easy to work with.
Replaced Rotors and new pads. Outstanding service and workmanship. These guys are my new go to mechanics.
Great job repairing my rear tire mount.
Zach did an excellent job replacing my Jeeps ball joints. Very satisfied with the joints he suggested and the work that was done.
Zach did some suspension work on my truck and it came out great, he was quick and the price was fair. Will definitely be back for more work in the future.
Hear it? See a drip?
Axle seal, pinion seal and wheel bearing repair in Windsor, CO, for Jeeps, Toyotas and trucks across Northern Colorado.