Walnut's Trusted Transmission Specialists

Your Transmission Deserves Better Than a Guess.

We don't swap parts and hope for the best. Every repair starts with a honest diagnosis — because your car deserves a mechanic who actually listens.

Schedule Service (909) 468-2939

Mechanic working on transmission in Walnut auto shop

947

Fairway Dr
Walnut, CA

4.9★

Local
Reputation

100%

Honest
Diagnoses

What We Do

Comprehensive Auto Care,
Delivered with Integrity

From routine maintenance to complex transmission overhauls — we treat every vehicle like it's our own.

Transmission Repair

Complete transmission diagnostics, rebuilds, and replacements for domestic and import vehicles. We fix it right the first time.

General Auto Repair

Brakes, suspension, engine diagnostics, and everything in between. No job is too big or too small for our team.

Pre-Purchase Inspection

Buying a used car? We'll give you an honest assessment before you hand over your money. Know what you're getting into.

Fluid Services

Transmission fluid changes, coolant flushes, and synthetic oil swaps. Regular maintenance that prevents costly repairs later.

Diagnostics & Electrical

Check engine lights, wiring issues, sensor replacements — we trace the problem, not just the symptom.

Maintenance Schedules

Follow your manufacturer's service intervals with our expert guidance. Keep your warranty intact and your car running smoothly.

Tomato Transmissions workshop in Walnut, California

Professional automotive tools and equipment

Local Walnut, CA
Since Day One

About Us

Not a Chain. Not a Guess. Just Good Mechanics.

Tomato Transmissions started with a simple belief: car owners in Walnut deserve a shop that treats their vehicle with the same care they would their own. We're not a franchise. We don't upsell services you don't need. And we won't tell you a part needs replacing when it doesn't.

Located on Fairway Drive, we've built our reputation one honest diagnosis at a time. Whether it's a routine oil change or a full transmission rebuild, we bring the same attention to detail and the same straightforward communication.

Transparent Pricing

On-Time Completion

Quality Parts Guaranteed

Locally Owned & Operated

Why Choose Us

The Difference Is in the Details

We've learned that people don't remember the price they paid. They remember how they were treated.

Honest Diagnoses, Every Time

We'll tell you what actually needs fixing — and what can wait. No pressure, no inflated estimates.

Clear Communication

We explain the problem in plain language. You'll know exactly what's happening with your vehicle before we touch a wrench.

Competitive & Fair Pricing

Quality work doesn't have to mean a premium price tag. We keep our overhead low so you get the best value.

Your Neighbors Trust Us

We're right here on Fairway Drive. Our reputation is our most valuable asset, and we protect it carefully.

Detailed transmission work at Tomato Transmissions

"We treat every customer like a neighbor — because most of them are."

— Tomato Transmissions Team

Testimonials

What Our Customers Say

"Took my car in for a transmission issue that two other shops couldn't figure out. Tomato Transmissions diagnosed it in an hour and had it running smoothly by the next day. Fair price and zero drama."

Verified Customer Walnut, CA

"Finally found a mechanic I can trust. They showed me exactly what was wrong with my brakes and didn't try to sell me anything I didn't need. That kind of honesty is rare these days."

Verified Customer Diamond Bar, CA

"Had a pre-purchase inspection done before buying a used SUV. They were thorough, pointed out real issues, and even told me what was fine so I didn't worry about it. Made my decision so much easier."

Verified Customer Pomona, CA

Contact

Visit Us or
Give Us a Call

We're conveniently located in Walnut and always happy to answer questions. Stop by during business hours or reach out anytime.

Address 947 Fairway Dr, Walnut 91789

Phone (909) 468-2939

Email joeyounghee@gmail.com

Send Us a Message

Tell us about your vehicle and we'll get back to you as soon as possible.

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Phone Number

Email Address

Vehicle (Year, Make, Model)

Service Needed

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Thank you for reaching out. We'll get back to you within one business day.