Advance Transmissions
& Complete Auto Care
From Oil Changes To Transmission Rebuilds
636-978-7730
Trusted Across St. Charles County
Family Owned & Operated • BBB Accredited • ATRA Member • 3-Year / 100,000-Mile Warranty On Rebuilt Transmissions
Current Coupons & Offers
$200–$500 OFF
Qualifying repairs. Expires August 31, 2026.
$20 OFF
Any A/C diagnostic service.
FREE TOWING
Up to $200 with a qualifying major repair.
Only one coupon may be used per visit. Some restrictions apply. Coupons cannot be combined with other offers. See shop for details.
Full-Service Auto Repair & Maintenance
One shop for everything your vehicle needs—from a routine oil change to a complete transmission rebuild. Tap any service to learn more, or book online in seconds.
Maintenance
Oil Changes
Conventional, synthetic blend, or full synthetic—handled by the same certified technicians who rebuild transmissions. Free multi-point inspection every time.
Battery Service
We test the battery, the alternator, and the starter, so you replace the part that actually failed—not the one that was easiest to guess.
Preventive Maintenance
Scheduled service that keeps small problems small. And servicing with us will never void your factory warranty.
Multi-Point Inspection
A free health check of your vehicle’s key systems with every service visit. No charge, no pressure, no obligation.
Repair
Brake Repair
Squealing or grinding? We measure pads and rotors against spec and recommend only what your safety actually requires.
A/C Repair & Recharge
Blowing warm? We diagnose before we recharge, so a leak doesn’t leave you hot again in three weeks. Ask about $20 off your A/C diagnostic.
Transmission Repair
Targeted repairs that fix the failed component rather than replacing the whole unit—when that’s genuinely the right call.
Transmission Rebuild
The work other shops send our way, backed by our 3 year / 100,000 mile warranty on rebuilt transmissions.
Diagnostics & Inspections
Engine Diagnostics
Check engine light on? A trouble code names the system, not the cause. We test to find the real problem before you buy any parts.
Transmission Diagnostics
Slipping or shifting hard? A transmission problem doesn’t always mean a rebuild—and we’ll tell you when it doesn’t.
Electrical Diagnostics
Dead battery, blown fuses, or gremlins nobody else could find? We trace faults to the source instead of guessing.
Vehicle & Motorcycle Inspections
Standalone inspections, including pre-purchase checks before you buy used. And yes—we inspect motorcycles.
COMING SOON: Tires • Alignments • Missouri State Inspections
Don’t Wait
Until It’s Too Late!
Bring your vehicle to us for preventive maintenance and watch it last for years to come.
Start Saving
Money Today
Save $200–$500 on qualifying repairs, get $20 off an A/C diagnostic, and more. See all current offers.
Schedule
In Seconds
Book your appointment online, day or night — no phone call needed.
Complete Auto Care & Transmission Experts In Lake St. Louis
ONE TRUSTED SHOP FOR EVERYTHING YOUR VEHICLE NEEDS
When your vehicle needs attention — whether it’s a routine oil change, a brake job, an A/C recharge, or a complete transmission rebuild — you deserve one local shop you can trust to handle it all.
Advance Transmissions & Complete Auto Care is exactly that: full-service automotive repair and maintenance for every make and model, backed by the transmission expertise that has made us the region’s go-to specialists for over 45 years.
From preventive maintenance that keeps small problems small, to the complex drivetrain repairs other shops send our way, our certified technicians do it all under one roof.
Call us today at 636-978-7730 or book your appointment online!
Our transmission & drivetrain services:
- Transmission diagnostics
- Transmission repair
- Transmission rebuild
- Transmission replacement
- Clutch repair and replacement
Our complete auto care services:
- Oil changes
- Battery service
- Brake repair
- Preventive maintenance
- Multipoint inspections
- Engine diagnostics
- Electrical diagnostics
- A/C diagnostics, recharge, and repair
- Vehicle and motorcycle inspections
Coming soon: Tires, Alignments, and Missouri State Inspections.
Experienced and Trusted Technicians
After you bring your car into Advance Transmissions for vehicle diagnostics, transmission diagnostics or repairs, we will provide you with the quality of service you deserve.
However, if your transmission is in need of servicing, you should not let anyone except an experienced, professional technician take care of the repair.
Out of all the parts your vehicle has, the transmission is one of the most important and complex to fix.
Because we understand that no matter what type of problem you are experiencing with your car, it can prevent you from getting to work, school, or taking care of your various obligations. Above all you can count on us to help you in your time of need.
We also provide:
- Transfer case repair
- Differential repair
- Tune ups
- Shocks/struts repair
- Radiator repair
Over 45 Years Of Reliable Auto Repair And Transmission Service
We’ve been keeping St. Charles County on the road since long before most shops in the area opened their doors. That experience is why other shops send us their hardest drivetrain work—and why our neighbors trust us with everything from a routine oil change to a full rebuild.
3 YEAR or 100,000
MILE WARRANTY
ON OUR REBUILT TRANSMISSIONS!
Need auto repair or transmission service?
Call us at 636-978-7730
Or
Fill In The Form Below!
WHY SHOULD YOU CHOOSE US? IN CONCLUSION, JUST A FEW REASONS TO CALL US!
- Complete auto care — from oil changes to transmission rebuilds!
- Free towing up to $200 with a qualifying major repair!
- Your satisfaction is our highest priority!
- 5-Star repair services!
- Quality work at an affordable price!
- Over 45 years of experience!
- We are family owned and operated!
- Warranty on all of our work!
Questions You Should Ask Any Repair Shop
Before you hand your keys to anyone, these are the questions worth asking—of us, and of every other shop you call. Here are our answers. Go compare them.
How long have you been in business?
Over 45 years, family owned and operated, right here in Lake St. Louis. Longevity matters in this trade—a shop that has stood behind its work for four and a half decades has had plenty of chances to do otherwise.
Are you an ATRA member?
Yes. We’re a member of the Automatic Transmission Rebuilders Association, the industry body for transmission specialists. Ask any shop this question—not all of them can say yes.
What is your Better Business Bureau standing?
We are BBB Accredited with an A+ rating. It’s a fair question to ask any shop before you hand over your keys, and it takes about thirty seconds to verify.
What do your online reviews look like?
Go read them—we’d rather you did. You can see our Google reviews from real St. Charles County customers right here, and there are more on this page below.
Do you specialize, or are you a general repair shop?
Both, and that combination is unusual. We built our reputation on transmissions—the work other shops refer out—and we also handle complete auto care: oil changes, brakes, A/C, batteries, diagnostics, and inspections. One shop, one set of records, no runaround.
What warranty do you provide on a transmission rebuild?
A 3 year / 100,000 mile warranty on our rebuilt transmissions. When you call around, ask other shops for their number—and ask what it actually covers.
What does the warranty cover, and is it prorated?
This is the question most people forget to ask. Warranties vary enormously on parts versus labor, fluid, tax, and whether coverage is prorated over time. We’ll walk you through our full terms in writing before you commit to any work—no surprises later.
What is your diagnostic fee?
We’ll tell you the diagnostic cost up front, before we begin—never after. And check our current coupons first: right now that includes $20 off an A/C diagnostic.
How soon can you look at my vehicle?
Usually quickly—call us at 636-978-7730 or book online and we’ll give you a realistic timeframe for both the diagnosis and the repair. A shop that won’t commit to a timeline is telling you something.
What if my vehicle isn’t safe to drive to you?
Ask about our free towing offer—up to $200—with a qualifying major repair. If your transmission is slipping badly or stuck in limp mode, please don’t drive it in. Driving on a failing transmission turns a moderate repair into a major one.
Call a few shops and compare the answers. When you’re ready, we’re at 636-978-7730—or book online in seconds.
626 Lakeside Plaza, Lake St. Louis, MO 63367 • Monday–Friday, 8:00 AM–5:00 PM