A car that keeps bouncing after a bump instead of settling has worn shock absorbers or struts. Healthy shocks dampen a bump in 1–2 oscillations. Worn shocks allow 3, 4, or more bounces — plus body roll in corners, nose dive under braking, and tire cupping. Chico's CA-32 rough sections and summer heat cause shock wear at 40,000–60,000 miles vs 50,000–80,000 nationally.
If your car keeps bouncing after hitting a bump in Chico rather than settling in 1–2 oscillations, the shock absorbers or struts are worn. Shocks and struts are hydraulic dampers — they control how quickly the suspension spring compresses and rebounds. Worn shocks allow the car to keep oscillating (bouncing) after a bump instead of damping it out. Chico's CA-32 rough sections, East Avenue potholes, and summer heat all accelerate shock wear.
The spring in your suspension stores energy when the wheel hits a bump — then releases it, pushing the wheel back down. Without a functioning shock absorber to dampen this energy release, the car bounces: wheel goes up, spring pushes it down, wheel overshoots, bounces up again, repeatedly. A healthy shock dampens this in 1–2 cycles. A worn shock allows 3, 4, or more bounces before settling. This is the bounce test result most people have heard about: push down on the corner of the car and release — it should bounce once and stop. More than one bounce = worn shocks.
MacPherson struts (most front-wheel drive cars, many SUVs) are a single unit combining the shock absorber and part of the suspension structure — the coil spring surrounds the strut body. Twin-tube shocks (many rear suspensions, trucks, older vehicles) are standalone dampers. Both wear the same way — the internal hydraulic fluid degrades and the valving wears, reducing damping force. Strut replacement requires a spring compressor and alignment afterward; shock replacement is generally simpler.
Shock absorbers on vehicles regularly driven on CA-32's rough sections near the foothills or East Avenue potholes compress and rebound thousands of additional cycles compared to smooth-road vehicles. Heat from Chico summers also degrades the hydraulic fluid faster. We see shocks wearing at 40,000–60,000 miles in Chico vs the typical 50,000–80,000 national range.
Trucks and SUVs used for towing to Lake Oroville or hauling on Hwy 70 experience accelerated shock wear from the additional dynamic load. Tow vehicles should plan for shock replacement every 40,000–50,000 miles in Chico.
Push down firmly on each corner of the vehicle and release. The vehicle should bounce once and settle. More than one additional bounce = shock worn on that corner. Quick test, done in 2 minutes in the parking lot.
On the lift, we inspect each shock and strut for: oil leakage from the shock body (definitive failure), bushing condition at the top and bottom mounts, and physical damage from road impact. An oily shock has failed — the seal is gone and the damping fluid has been expelled.
A test drive over a rough section of road (CA-32 or East Avenue) characterizes the actual bounce behavior. The road test also assesses body roll in corners and nose dive under braking — both components of overall handling degradation from worn shocks.
We replace shocks and struts in axle pairs — both fronts or both rears together. A new shock on one side with a worn shock on the other creates imbalanced handling that can be more dangerous than both worn. New vs worn shock on opposite sides causes the vehicle to handle differently left vs right.
MacPherson strut replacement requires a wheel alignment — the strut is part of the alignment geometry. Hunter Hawkeye Elite alignment included with front strut replacement. Rear shock replacement on most vehicles does not require alignment.
Worn shock absorbers or struts — the hydraulic dampers that control how quickly the suspension spring rebounds after compression. A worn shock allows the spring energy to dissipate through multiple bounces instead of being absorbed. More than one bounce per corner on the push-down bounce test confirms worn shocks.
Push down firmly on each corner of the vehicle and release quickly. The car should bounce once and settle back to resting position. If it bounces more than once (rocks back and forth), the shock on that corner is worn. Simple, free test in your driveway.
40,000–60,000 miles in Chico due to rough roads (CA-32, East Avenue) and summer heat degrading the hydraulic fluid. National average is 50,000–80,000 miles. Tow vehicles and vehicles driven on unpaved access roads see even shorter intervals.
Front strut replacement (MacPherson strut design): yes, alignment is required — the strut is part of the alignment geometry. Rear shock replacement on most vehicles: not required. Hunter Hawkeye Elite alignment included with every front strut job at Tedious.
Quoted by vehicle after inspection. Struts are more involved than shocks (spring compression required). We replace in axle pairs for balanced handling. Written estimate before work begins.
digital inspection when performed · Written estimates before any work
📍 2695 CA-32, Chico, CA 95973 · Open Mon–Fri 7AM–6PM · Sat 8AM–5PM · Sun 9AM–5PM · Open 7 Days
2695 CA-32, Chico · (530) 826-4275 · Hunter Hawkeye Elite
Buddy Rausch founded Tedious Auto Repair in Chico, CA in 2007 and has been serving Butte County for 18+ years. Buddy oversees shop standards and quality control. All content on this page reflects real procedures, OEM specifications, and cases seen in the shop. About Buddy Rausch, ASE-Certified →