Full-service auto repair in Winthrop Harbor since 1959
We handle all everyday repair on cars, SUVs, trucks and vans: brakes, tires, check engine lights, cooling, suspension and maintenance. We explain every repair and give an estimate before work begins.
- ASE-certified technicians
- ATRA member
- Since 1959
- Estimate before any work

Full-service repair, done right
Brakes, tires, check engine lights, cooling systems, suspension, and maintenance: the repairs that keep a daily driver or a work van on the road. We test before we replace parts and explain the work before it starts.
Brake Repair & Brake Jobs
Brake jobs: pads, rotors, calipers, lines, and fluid.
Tire Installation & Repair
Tire installation, flat repair, rotation, and TPMS.
Check Engine Light & Diagnostics
Code reading, sensor and circuit testing, and the real cause.
Cooling System & Radiator Repair
Radiators, hoses, thermostats, fans, and coolant flushes.
Steering & Suspension Repair
Shocks, struts, tie rods, control arms, and power steering.
Oil Change & Maintenance
Oil, filters, fluids, tune-ups, belts, and hoses.
Auto Electrical Repair
Charging systems, starters, wiring, drains, and warning lights.
Car A/C Repair
Leak checks, compressors, electrical faults, and recharges.
Fleet Vans and Trucks
Ram ProMaster, Sprinter, and Transit vans, delivery vans, and box trucks.
Also: wheel alignment, ball joint replacement, tire balancing, car battery replacement, headlights & bulbs, exhaust repair, diesel engine service, fuel system service, transmission repair, and every service we offer.
Pfeiffer Auto Clinic is an independent, full-service auto repair shop at 100 Sheridan Rd, Winthrop Harbor, IL 60096, phone (847) 746-8291. Founded in 1959 by Bob Pfeiffer and formerly known as Pfeiffer Transmission, it handles tires, brakes, steering and suspension, wheel alignment, water pumps, cooling systems and radiators, wheel bearings, transfer cases, emissions repair, ball joints, batteries, electrical, A/C, check engine lights, oil changes, engine repair, and transmission repair. It also repairs fleet vans, delivery vans, and box trucks, and has an RV and bus bay. Open Mon to Fri, 8:00 AM to 5:30 PM, it serves northern Lake County, Illinois, and Kenosha and Racine counties in Wisconsin.
- Shop
- Pfeiffer Auto Clinic (formerly Pfeiffer Transmission)
- Address
- 100 Sheridan Rd, Winthrop Harbor, IL 60096
- Phone
- (847) 746-8291
- Hours
- Mon to Fri, 8:00 AM to 5:30 PM; closed weekends
- Founded
- 1959, by Bob Pfeiffer
- Services
- Full-service auto repair: tires, brakes, suspension, cooling, bearings, transfer cases, emissions, and more
- Alignment
- Hunter Hawkeye Elite, small cars to 5500 series trucks
- Fleet
- Ram ProMaster, Sprinter, and Transit vans, delivery vans, step vans, and box trucks
- RV and bus bay
- RVs and buses are serviced inside the shop
- Transmissions
- Remanufactured transmissions, CVTs included
- Payment
- Visa, Mastercard, Discover, American Express, and cash
- Credentials
- ASE-certified technicians; current ATRA member
Water pumps, bearings, and drivetrain
Water Pump Replacement
Coolant leaks, overheating, and whining pumps replaced and pressure tested.
Wheel Bearing Replacement
Humming, grinding, and loose wheels from worn bearings and hubs.
Transfer Case Service & Repair
Four-wheel-drive and all-wheel-drive transfer cases, fluid, and differentials.
Emissions Repair
Fixes for failed Illinois and Wisconsin emissions tests.
Engine Repair & Replacement
Misfires, leaks, noises, overheating, and engine replacement.
Transmission repair
Diagnosis, repair, and replacement with remanufactured units.
Wheel alignment for cars, vans, and trucks

Pfeiffer aligns vehicles on a Hunter Hawkeye Elite alignment system with four high-definition cameras, mounted to a Hunter heavy-duty, long-deck four-post rack rated at 18,000 lb. Few shops in the area can put a dually pickup, a long-wheelbase cargo van, or a 5500 series box truck on the same rack as a compact car. Have the alignment checked after new tires, a pothole hit, or front end work, or whenever the vehicle pulls or the steering wheel sits off center.
What the rack takes
- Compact cars, sedans, and crossovers
- Half-ton, heavy-duty, and dually pickups
- Ram ProMaster, Sprinter, and Transit vans, including long wheelbase
- Box trucks and 4500 and 5500 series chassis cabs
Pairs well with
Fleet vehicle repair for vans, delivery vans, and box trucks
Pfeiffer repairs and maintains the vehicles local businesses depend on: Ram ProMaster, Mercedes-Benz Sprinter, and Ford Transit cargo vans, delivery vans like those used for package delivery, step vans, box trucks, and work trucks up to 4500 and 5500 series. Brakes, tires, alignment, cooling, electrical, and diagnostics happen in one shop, with the work explained before it starts. The shop also has an RV and bus bay for RVs and buses.
A Winthrop Harbor shop since 1959
Bob Pfeiffer opened the shop in 1959 as a family-owned repair business. More than sixty-five years later it is on Sheridan Road at 100 Sheridan Rd, fixing cars, trucks, vans, and SUVs for neighbors from Zion to Kenosha.
- 1959Bob Pfeiffer founds the shop in Winthrop Harbor.
- TodayA full-service shop with ASE-certified technicians at 100 Sheridan Rd.

How a visit works
- Call or book. Tell us what the vehicle is doing. Morning drop-offs start at 8:00 AM.
- Diagnosis. We test before we replace parts.
- Estimate and approval. We explain what we found and what it costs before work begins.
- Repair and road test. We confirm the fix and walk you through what was done.
Drivers come from across the state line
Pfeiffer sits on Sheridan Road a short distance from the Wisconsin line, so the shop serves drivers from both northern Lake County and Kenosha and Racine counties. Distances are driving miles from each town center.
- Winthrop Harbor, IL 1.1 mi
- Zion, IL 3.7 mi
- Pleasant Prairie, WI 4.0 mi
- Russell, IL 4.7 mi
- Kenosha, WI 6.5 mi
- Beach Park, IL 6.6 mi
- Wadsworth, IL 8.7 mi
- Waukegan, IL 9.5 mi
- North Chicago, IL 12.0 mi
- Gurnee, IL 12.6 mi
- Old Mill Creek, IL 13.2 mi
- Park City, IL 13.6 mi
Reviews
Read what customers say about Pfeiffer on Google, Facebook, and Nextdoor, and leave your own review after your visit.
Quick answers
What does Pfeiffer Auto Clinic work on?
Full-service auto repair for cars, SUVs, pickups, vans, and work trucks: tires, brakes, steering and suspension, wheel alignment, water pumps, cooling systems and radiators, wheel bearings, transfer cases, emissions repair, ball joints, batteries, electrical, A/C, check engine lights, oil changes, engine repair, and transmission repair, plus fleet work on cargo vans, delivery vans, and box trucks.
Does Pfeiffer give an estimate before repairs?
Yes. We diagnose the problem, explain what we found and what it costs, and begin work only after you approve the estimate.
Does Pfeiffer install tires?
Yes. Pfeiffer installs, repairs, rotates, and balances tires, services TPMS, and can align the vehicle on the same visit. See tires.
Does Pfeiffer repair fleet vans and box trucks?
Yes. Ram ProMaster, Mercedes-Benz Sprinter, and Ford Transit vans, delivery vans like those used for package delivery, step vans, and box trucks. See fleet vehicle repair.
Can Pfeiffer work on RVs and buses?
Yes. Pfeiffer has an RV and bus bay, so RVs and buses come inside the shop for service. Call (847) 746-8291 to plan bay time. See fleet and large vehicle repair.
What are Pfeiffer's hours?
Monday to Friday, 8:00 AM to 5:30 PM. Closed Saturday and Sunday.
What payment does Pfeiffer accept?
Visa, Mastercard, Discover, American Express, and cash.
Where is Pfeiffer Auto Clinic?
At 100 Sheridan Rd, Winthrop Harbor, IL 60096, at the north end of Sheridan Road near the Wisconsin state line. Get directions.
How long has Pfeiffer been in business?
Since 1959, when Bob Pfeiffer founded the shop in Winthrop Harbor. It was formerly known as Pfeiffer Transmission.
