Sonoma County's Trusted Auto Repair & Transmission Specialist
28 years of honest auto repair from the heart of Sonoma County. ASE & ATRA certified mechanics specializing in transmissions, brakes, engines, and complete vehicle care — right off Highway 101 in Rohnert Park.
Why Sonoma County Trusts Rohnert Park Transmission
Since 1997, Rohnert Park Transmission & Auto Repair has been Sonoma County's go-to shop for everything from routine oil changes to complex transmission rebuilds. We're not a chain that opened a franchise last year — we're a family-owned shop that has been part of this community for nearly three decades.
Our ASE and ATRA dual certification sets us apart. ASE proves our technicians meet national standards for auto repair. ATRA — the Automatic Transmission Rebuilders Association — means we specialize in the one system most shops aren't equipped to handle. When your transmission acts up on Highway 101 or your check engine light comes on driving through the Sonoma Valley, you want a shop that can diagnose the real problem and fix it right the first time.
With 192 reviews and a 4.8-star rating, our reputation speaks for itself. We've earned RepairPal certification and a BBB A+ rating by doing the same thing every day for 28 years: telling customers the truth about what their vehicle needs, charging a fair price, and standing behind the work.
Transmission Repair for Sonoma County
Transmissions are what built our name. As ATRA members, we handle every type of transmission work — from fluid services and solenoid replacements to complete rebuilds on automatic, manual, and CVT transmissions.
Sonoma County driving is hard on transmissions. Stop-and-go traffic on Highway 101 through Santa Rosa, steep vineyard roads through the Sonoma Valley, towing boats to Bodega Bay, and hauling equipment through wine country — these conditions stress transmissions in ways that flat-road driving doesn't.
Most shops in Sonoma County send transmission work out to a specialty shop — adding markup and turnaround time. We do everything in-house, from diagnosis to rebuild to road test. That means faster turnaround and lower cost for you.
Our Transmission Services
- Transmission fluid change & flush
- Automatic transmission rebuild
- Manual transmission repair
- CVT transmission service
- Torque converter replacement
- Solenoid & valve body repair
- Transmission cooler service
- Transfer case repair (4WD/AWD)
- Clutch replacement
- Differential service & repair
Complete Auto Repair Services for Sonoma County
Transmission repair is our specialty, but we handle everything your vehicle needs — brakes, engine work, diagnostics, oil changes, AC repair, tires, and more. One trusted shop for all your automotive needs.
Cities We Serve in Sonoma County
From our central Rohnert Park location on Highway 101, we serve every community in Sonoma County. Most drivers reach us in 15 minutes or less — and the quality of work is worth every mile.
Mechanic Rohnert Park
Our shop is right here — 305 Laguna Dr off Highway 101
Mechanic Santa Rosa
Sonoma County seat, just north on Highway 101
Mechanic Petaluma
Quick drive south on 101, east Petaluma or Petaluma Hill Rd
Mechanic Cotati
Our next-door neighbor, just one exit south on 101
Mechanic Sebastopol
West county hub via Highway 12 or Stony Point Road
Mechanic Windsor
North county wine country, straight up 101
Mechanic Healdsburg
Wine country gateway at the top of Sonoma County
Mechanic Sonoma
Historic town square, via Highway 12 through the Valley
Mechanic Cloverdale
Northern Sonoma County, Highway 101 corridor
Mechanic Penngrove
Rural community between Rohnert Park and Petaluma
Mechanic Kenwood
Sonoma Valley wine country via Highway 12
Mechanic Forestville
Russian River area via River Road or Highway 116
Mechanic Bodega Bay
Sonoma Coast via Bodega Avenue and Highway 1
Also Serving These Sonoma County Communities
Sonoma County Driving Conditions & Your Vehicle
Sonoma County isn't flat freeway driving. From the daily Highway 101 commute between Petaluma and Santa Rosa to the winding vineyard roads through Dry Creek Valley and the Sonoma Valley, local driving conditions put unique demands on your vehicle.
Highway 101 corridor: The backbone of Sonoma County commuting. Stop-and-go traffic from Petaluma through Santa Rosa to Windsor wears brakes, heats transmissions, and adds rapid mileage. If you commute on 101, your vehicle needs more frequent maintenance than the manufacturer's "normal" schedule.
Wine country roads: Highway 12 through Sonoma Valley, Westside Road through Healdsburg, Dry Creek Road, Bennett Valley Road, Petaluma Hill Road — these are steep, curving roads that stress transmissions, brakes, and suspension. Trucks and SUVs hauling vineyard equipment take an especially hard hit.
Coastal fog and salt air: Drivers along the Sonoma Coast and western Sonoma County deal with persistent fog moisture and salt air that accelerates corrosion on brake rotors, undercarriage components, and electrical connections. Regular inspections catch these issues before they become expensive problems.
Seasonal extremes: Summer heat through the inland valleys pushes cooling systems and AC. Winter rain on rural Sonoma County roads means hydroplaning risk if tires are worn. We see the patterns and know exactly what to check based on how and where you drive.
Drive Times to Our Shop
Closest (5-12 min)
Mid-Range (15-25 min)
Farthest (30-40 min)
Key Routes to Our Shop
- Highway 101: Main north-south corridor — exit Rohnert Park Expressway or Wilfred Avenue, then Laguna Drive
- From Petaluma: 101 North or Petaluma Hill Road to Rohnert Park Expressway
- From Sebastopol: Highway 12 East or Stony Point Road North to Rohnert Park Expressway
- From Sonoma Valley: Highway 12 West through Santa Rosa, then 101 South to Rohnert Park
- From the Coast: Bodega Avenue or Highway 116 to 101 South
Why Choose RPT Over Chain Shops
Sonoma County has no shortage of chain auto repair shops and dealership service departments. Here's why drivers keep choosing us instead.
ASE & ATRA Certified Specialists
Dual-certified technicians with the same qualifications as dealership mechanics — without the dealership markup. ATRA membership means we specialize in the transmission work that general shops send out.
Sonoma County's Home Shop Since 1997
We didn't move here from out of town. Rohnert Park Transmission has been on Laguna Drive for nearly three decades. We know the roads, we know the driving conditions, and we know what Sonoma County vehicles need.
Honest Pricing, No Surprises
Every repair starts with a clear diagnosis and upfront quote. No hidden fees, no unnecessary upsells. We tell you exactly what your car needs — and what it doesn't. That's how we've earned 192 reviews and a 4.8-star rating.
Transmission Specialists, Full-Service Shop
We built our reputation on transmission work, but we handle everything from oil changes to engine rebuilds. One trusted shop for every repair — no need to bounce between specialists.
Written Warranties on All Repairs
Every repair is backed by a written warranty. We stand behind our work because we know it's done right the first time — that's the ATRA standard we hold ourselves to.
Central Sonoma County Location
Our Rohnert Park shop sits right off Highway 101, making us easy to reach from Santa Rosa, Petaluma, Cotati, Sebastopol, Windsor, and every Sonoma County community. Most customers are here in 15 minutes or less.
What Sonoma County Drivers Say
Real reviews from drivers across Sonoma County
"My transmission started slipping on Highway 12 coming back from Sonoma. Brought it here the next morning and they had it diagnosed within an hour. Fair price, honest assessment, and my truck has been running perfectly ever since. This is the only shop I trust."
David M.
Santa Rosa
"I've been driving up from Petaluma for six years now. The 15-minute drive is worth it every time. They've maintained both my cars through everything — from routine oil changes to a full transmission rebuild on my SUV. Honest people who do excellent work."
Sarah K.
Petaluma
"After getting quoted $3,800 at a chain shop in Santa Rosa, I brought my Honda here for a second opinion. Turned out I didn't need half of what they recommended. Rohnert Park Transmission fixed the actual problem for $1,400. That's integrity you don't find at chain shops."
Tom W.
Sebastopol
Frequently Asked Questions
Common questions from Sonoma County drivers about our auto repair services
Where is your shop located in Sonoma County?
We're at 305 Laguna Dr in Rohnert Park, right off Highway 101 between the Rohnert Park Expressway and Wilfred Avenue exits. We're centrally located in Sonoma County — Santa Rosa is 10 minutes north, Petaluma is 12 minutes south, Cotati is 5 minutes away, and even Sebastopol and Windsor are under 20 minutes.
What makes you different from chain auto repair shops in Sonoma County?
Three things: certifications, specialization, and ownership. We're both ASE and ATRA certified — most chain shops are neither. We specialize in transmissions, which is the most complex system in your vehicle and the one most shops can't handle in-house. And we're family-owned since 1997, so the owner is here every day. When your name is on the building, the quality standard is different.
Do you work on all vehicle makes and models?
Yes. We service every make and model — domestic, Japanese, European, and luxury vehicles. Ford, Chevy, Toyota, Honda, BMW, Mercedes, Audi, Subaru — if it has an engine and transmission, we work on it. Our ASE certified technicians use factory-level diagnostic equipment for accurate diagnosis regardless of brand.
How long does a transmission repair typically take?
It depends on the repair. A transmission fluid service takes about an hour. Solenoid replacement or valve body work is usually same-day. A full transmission rebuild typically takes 2-3 business days. We always give you an accurate timeline before starting work, and we call immediately if anything changes.
Do you offer free estimates?
We offer free visual inspections and estimates for most repairs. For complex transmission issues, we charge a diagnostic fee that covers a thorough evaluation with our scan tools and road test — but that fee is applied toward the repair if you choose to have the work done here. Call (707) 584-7727 to discuss your specific situation.
What are your hours and how do I schedule an appointment?
We're open Monday through Thursday 7:30 AM to 5:00 PM, and Friday 7:00 AM to 4:00 PM. We're closed weekends. Call (707) 584-7727 to schedule — we can usually get you in within a day or two for most services, and same-day for urgent issues like check engine lights or transmission problems.
Why do Sonoma County drivers come to Rohnert Park for auto repair?
Location and reputation. Rohnert Park sits at the center of Sonoma County on Highway 101, so we're a quick drive from virtually every community in the county. Combine that with 28 years of consistent, honest work, 192 five-star-level reviews, and transmission expertise that most shops simply don't have — and the choice makes itself.
Do you handle fleet vehicles and commercial trucks?
Yes. We service fleet vehicles for several Sonoma County businesses — delivery vans, work trucks, company cars. Fleet customers get priority scheduling and we coordinate directly with fleet managers on maintenance schedules. Our Highway 101 location makes us convenient for commercial vehicles operating throughout the county.
What should I do if my transmission is slipping on Highway 101?
Pull over safely as soon as possible — continuing to drive on a slipping transmission causes more damage and higher repair costs. Check your transmission fluid level if you can do so safely. Then call us at (707) 584-7727. We can advise over the phone whether the vehicle is safe to drive to our shop, or if you should have it towed. If you need a tow, we can recommend reliable Sonoma County tow companies.
Do you offer any warranties on your repairs?
Every repair we perform comes with a written warranty. As an ATRA member shop, we also provide nationwide warranty coverage on qualifying transmission repairs — meaning if something goes wrong while you're traveling, any ATRA member shop in the country can handle the warranty work. That's protection most independent shops can't offer.
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Finding a Trustworthy Mechanic in Sonoma CountyRed flags, green flags, and how to avoid overpaying for auto repair
Top Signs You Need Transmission RepairSlipping, grinding, delayed shifts — when to worry and when to act
How Often to Rotate Tires in Sonoma CountyLocal road conditions and how they affect your tire rotation schedule
Visit Sonoma County's Trusted Auto Repair Shop
305 Laguna Dr, Rohnert Park, CA 94928
Right off Highway 101 — Rohnert Park Expressway or Wilfred Avenue exit
Mon-Thu: 7:30 AM - 5:00 PM | Fri: 7:00 AM - 4:00 PM
Early drop-off available — leave your vehicle before we open
(707) 584-7727
Call for appointment or free estimate
Most Sonoma County drivers reach us in 15 minutes or less. Same-day appointments available for most services.
(707) 584-7727Need a Reliable Mechanic in Sonoma County?
28 years. 192 reviews. 4.8 stars. ASE & ATRA certified. Sonoma County's transmission and auto repair specialists are right here on Highway 101 in Rohnert Park. Call today for honest diagnosis and fair pricing.
(707) 584-7727