Signs Your UTV Shocks Are Worn Out: 8 Symptoms to Check

The most common signs your UTV shocks are worn out are oil on the shock body or shaft, a bouncy ride that keeps moving after a bump, bottoming out on hits the machine used to take, and clunking over rough ground. You may also notice the front end diving hard when you brake, more lean in corners, or cupped tire wear. Most of these you can check yourself in the driveway in about fifteen minutes.

At High Clearance UTV, we install suspension in-house on Polaris, Can-Am, Honda, Kawasaki, CFMOTO and other machines, and shocks are one of the parts we look at most. Jonathon Jeck has more than 20 years of mechanical experience, and the questions below are the ones he works through when a rider brings in a side-by-side (SxS) that rides worse than it used to.

8 Signs Your UTV Shocks Are Worn Out

Each of these is something you can see or feel without pulling a shock off the machine. One sign on its own is worth a second look. Two or three together usually means the shocks are done.

1. Oil on the shock body or shaft

Walk around the machine and look at the shaft on each shock, the polished rod that slides in and out of the shock body. A UTV shock holds its oil behind a seal at the top of the body, and the shaft slides through that seal every time the suspension moves. Oil on the outside means that seal is no longer holding, and a shock that has lost oil has lost damping.

A light film of oil with dust stuck to it is early seal weep. Keep an eye on it and plan a service. A wet, dirty shock body with oil running down toward the spring means the seal has failed and the shock has lost fluid, which means it has lost damping too.

2. Bouncy, floaty ride that keeps moving after a bump

You go over a root or a rock, and instead of settling once, the machine keeps moving up and down for a second or two afterward. That is the damper no longer controlling the spring.

There is a second version of this that shows up later in a ride. Inside the shock, a nitrogen chamber presses against the oil to keep the oil from turning to foam as the shock heats up and cycles. When the gas charge leaks out, the oil fills with air bubbles and the damping fades, so the shock can feel fine at first and turn soft and bouncy as it heats up and keeps cycling.

3. Bottoming out on hits the machine used to handle

You will notice worn shocks in the rough stuff first. If you are hitting the bump stops in whoops, g-outs (the dips where the trail drops and then climbs again), or small landings that your machine used to soak up without a hard hit, the shock has lost the damping that slows the last part of the stroke. Ride the same section you have ridden all year and pay attention to whether you are getting a hard bang at the bottom of the travel that you did not get last season.

4. Nose dive on braking, squat on acceleration

The damper controls how fast weight moves onto the front or rear suspension. When the fronts are worn, the nose dips hard and fast the moment you get on the brakes, and that dive can add to your stopping distance. When the rears are worn, the back end squats more than it used to when you get on the throttle. Both are easy to notice on a flat gravel road where nothing else is upsetting the machine.

5. Body roll and a loose feeling in corners

A worn shock lets the body lean farther and settle slower through a turn, so the machine feels like it is still moving under you after you have picked your line. On off camber trail, where the ground slopes sideways under you, the machine feels loose and unsettled, and you find yourself slowing down for corners you used to carry speed through. Check tire pressure before you blame the shocks, because a soft tire feels much the same.

6. Clunking, knocking, or squeaking over bumps

A clunk over bumps usually comes from the parts that hold the shock in place rather than from the shock itself. Worn shock bushings and eyelets let the shock move in its mount and knock against it. Squeaking usually points to a dry or worn bushing as well. Park on level ground with the wheels down, grab the shock body, and try to move it at the top mount and then the bottom mount. Any play you can feel by hand is play that makes noise on the trail. If both mounts are tight and the noise is still there, the noise is coming from inside the shock, and that one needs to come off the machine for service.

7. Cupped or scalloped tire wear

Shocks keep the tire pressed against the ground over bumps. When a shock stops controlling that motion, the tire hops instead of staying planted, and each hop scrubs a patch off the tread. The result is a scalloped pattern of high and low spots around the tire, which you can feel by running your hand around the tread. Cupping on its own does not prove the shocks are bad. A bad wheel bearing or a bent component can cause it too, so check the rest of that corner before you decide.

8. Visible damage on the shock itself

Get the machine on level ground and look each shock over. A bent shaft, deep scratches or scoring on the shaft, chipped or flaking shaft coating, a dented shock body, cracked or missing bump stops, and torn bushings are all reasons to stop riding hard on that corner. Damage on the shaft is the most serious thing you can find, because that polished surface is what the seal rides on, and a rough or bent shaft will not let a seal hold.

How to Check Your UTV Shocks at Home

Two checks cover most of it. Do both, and do them on all four corners so you have something to compare.

The bounce test

1. Park on level, flat ground and set the brake.
2. Push down hard on one corner of the machine, using your weight, and push it through as much suspension travel as you can.
3. Let go suddenly and watch that corner.
4. Count how many times it moves up and down before it settles.

One or two bounces before the corner settles is healthy damping, and three or more means the shock is worn. Do the same corner on the other side and compare. If one side bounces more than the other, that corner is the one to look at first.

The visual inspection

• Wash and dry the shocks first. Oil weep hides under a coat of dust, and you cannot judge a shock you cannot see.
• Look at the full length of the shaft with the suspension hanging free at full droop, which is where it sits when the wheel is off the ground. Then push the suspension down and look again, so you see the part of the shaft that normally sits inside the body.
• Check for oil at the seal head, which is the cap at the top of the shock body where the shaft goes in. Check the shaft and the body below it too.
• Look for a bent shaft, scoring, flaking coating, and dents in the body.
• Check the bushings and eyelets at both ends for cracks, play, and missing material.
• Check that the bump stops are present and not cracked or crushed.
• Compare each shock to the one on the other side of the machine. Two shocks that saw the same miles should look about the same.

One note on adjusters: if your shocks have compression, rebound, or preload adjustment, turning the knobs will not bring back a shock that has lost oil or gas charge. Adjusting a worn shock does not fix it.

What Else Can Feel Like Worn Shocks

Several other parts produce the same complaints, so work through this list before you buy shocks.

• Low or uneven tire pressure. A soft tire makes the machine feel bouncy and unsettled with nothing wrong at the shock. Check pressure first, because it takes two minutes and rules out the cheapest cause.
• Sagging springs or uneven ride height. A worn damper generally does not change how low the machine sits. It changes how the machine settles after a bump. If your rig sits lower than it used to, or lower on one corner, park on level ground and measure from a fixed point on the frame down to the ground at each corner, then compare left to right. A clear side to side difference points at a spring, not a damper.
• Spring preload set wrong. Preload that got turned too far in either direction changes ride height and how the machine settles, which is easy to mistake for a tired spring or a bad shock. Count the threads or the collar positions side to side and see whether they match.
• Worn A-arm or shock bushings. These cause clunks and a loose feeling much like a failing shock. Pry at the joint by hand or with a bar and watch for movement where the bushing should be holding tight.
• Worn tie rod ends and ball joints. These cause wander in the steering and a clunk over bumps. Get the wheel off the ground and check for play at the joint by rocking the wheel by hand.
• A bent A-arm, radius rod, or shaft. Bent parts change how one corner moves through its travel, and they usually turn up as a side to side difference when you measure ride height or compare the two shocks by eye.

How Long Do UTV Shocks Last?

Hours and conditions decide this more than years do. Polaris publishes a maintenance interval for its RZR line that calls for shocks to be rebuilt or replaced every 2,500 miles or every two and a half years, whichever comes first. For general trail riding, that is the interval to plan around. Racing is a different story. Fox states in its owner documentation that a Podium QS3 in racing service may need rebuilding every 10 to 20 hours, which shows how fast hard running uses up a shock. Where your machine falls between those two numbers depends on how hard you ride it.

Heat and dirt shorten that interval. Sustained speed and repeated hard hits heat the oil and fill it with air bubbles, which wears the internals faster. Sand, dust, and mud are abrasive and wear on the seals and the shaft. Whoops, g-outs, and landings put the most load on the parts that stop the shock at the end of its travel. Pressure washing straight at the seal head can push water and grit past a seal that is doing fine otherwise, so wash your shocks with a gentle spray and from a distance. Added weight wears shocks faster too, whether that is a cab, a winch, a bumper, or passengers and gear.

Rebuild or Replace Worn UTV Shocks

The first question is whether your shocks can be serviced at all, and that depends on which type you have.

	Rebuildable shocks	Sealed, non-rebuildable shocks
Typically found on	Performance shocks, including Fox Podium and QS3, Walker Evans, Elka, King	Many base model OEM shocks on entry and mid trim machines
How to tell	The manufacturer publishes a rebuild or service listing for that shock, and the shock has a fill valve or a reservoir cap	No service ports, and no published rebuild kit or service listing
What service involves	Teardown, inspection, new seals, fresh oil, and a nitrogen recharge to the specified pressure	No service is available, so the corner gets a new shock
Best choice when	The shaft and body are straight and undamaged, and you want the shocks you already have back to spec	The shock is leaking or faded, since a sealed unit cannot be opened and refilled

If you would rather buy different shocks than rebuild what you have, you can see what we carry in our UTV suspension kits and parts collection, and we can talk through what fits your machine.

What You Can Do Yourself, and What Needs a Shop

You can do the inspection, the bounce test, the tire pressure check, and the ride height measurements yourself with tools you already own. The shock internals are where it stops being a driveway job. Servicing a shock means safely discharging and later recharging a nitrogen chamber to a specified pressure, which takes a nitrogen source and a proper fill fitting. It also means compressing and removing the spring with a spring compressor, and installing new seals without nicking them. At that point the risk of getting hurt or ruining a good shock goes up sharply, so bring it to a shop instead. A damaged shaft settles the question before any of that comes up. A new seal on a bent or scored shaft will start leaking again, so that shock gets replaced rather than rebuilt. We wrote about the signs a UTV needs professional repair if you want a broader read on when to hand a job over.

We inspect shocks, handle rebuilds and replacements, and install suspension in-house. Our service department can also come get your rig within a 30 mile radius of Fayetteville if you would rather not haul it in.

Frequently Asked Questions

Can you ride with worn shocks?

Park the machine if a shock is leaking heavily or the shaft is bent, because both can turn into a failure on the trail. Short of that, you can keep riding, but expect less control in braking and corners and a rougher ride. Worn shocks also pass impacts to parts that were not built to absorb them, which adds load to bushings, ball joints, and frame mounts over time.

Do you have to replace all four shocks, or just the bad one?

Replace shocks in pairs on the same axle at minimum, so damping matches side to side. A new shock next to a worn one wears faster and loads the rest of that corner unevenly. Replace all four when age and hours are the reason rather than one failed unit, since the other three are probably close behind.

How do you find out which shocks you have?

Start by looking the shocks over for a brand name or model marking, which many shocks carry on the body or the reservoir. If nothing is legible, the owner's manual or the parts diagram for your machine's year and model will list what it came with. Send us your VIN if you would rather have someone else sort it out.

Not Sure What You Are Looking At?

Run the bounce test and look your shocks over this weekend. If you find oil, feel play in a bushing, or just want a second opinion before you spend money, bring the machine by and we will take a look and give you a straight answer on rebuild or replace. We are a women-owned, family-operated shop at 1208 W Cato Springs Rd., Fayetteville, AR 72701, and you can call us at 815-953-9346 or email sales@highclearanceutv.com. If hauling it in is the hard part, we can come get it within 30 miles of Fayetteville.