Specialized Diagnostics
Computerized, dealer-level scanning finds the real root cause — no guesswork, no unnecessary upsells.
Lake Forest & Orange County
Expert Transmission & Auto Care in Lake Forest, CA
Specialists in transmissions, drivetrain, axles and brakes. Honest diagnostics, competitive pricing and fast turnaround — so you get back on the road sooner.
- Walk-ins & appointments welcome
- Domestic, foreign & luxury vehicles
- Transparent, upsell-free pricing
- Open 7 days, 8:00 AM – 6:00 PM
Quality Parts & Workmanship
Rebuilds and replacements done with quality components and hands-on oversight from head tech Francisco.
Complete Drivetrain & Suspension
Transmissions, transfer cases, differentials, axles, struts and brakes — domestic, foreign and luxury.
Our Services
Complete drivetrain, brake & suspension repair
From full transmission rebuilds to CV axles and brake jobs — one shop for everything that moves and stops your vehicle.
Transmissions
Repair, rebuilding and full replacement for automatic and manual transmissions.
Transfer Case
Service, resealing and repair for 4WD and AWD transfer cases.
Differential
Differential repair, gear service and preventative maintenance.
Drive Shaft
Drive shaft repair, u-joint replacement and precision balancing.
Axles & CV Joints
Axle shafts, CV joints and boots replaced with quality parts.
Brakes
Brake diagnostics, pads, rotors and fluid service done right.
Struts & Suspension
Struts, shocks and complete suspension and steering service.
Computer Diagnostics
Dealer-level scanning plus A/C and heating controller repairs.
Why Choose Us
Straight answers from a specialist shop
- Talk directly to the technician
- Francisco personally handles diagnosis and communication — no service-writer telephone game.
- Transparent pricing
- We diagnose the true root cause and quote only the work your vehicle actually needs.
- Fast turnaround
- Quick diagnostic inspections and efficient repairs get your vehicle back on the road quickly.
- Luxury & foreign capability
- Comfortable with domestic vehicles and complex European models like Land Rover and Range Rover.
What Customers Say
Trusted by Orange County drivers
Walk-Ins WelcomeHonest DiagnosticsOpen 7 DaysForeign & Luxury
Range Rover transmission rebuild
“Francisco is the best! Very smart and works fast! He rebuilt my transmission on my 2012 Range Rover and I am very happy with the results!”
Honest, affordable, fast
“The real deal! Honest, affordable, and fast. Francisco and his team take a hands-on approach and get it done well, cheap, and fast. They're so trustworthy I sent my mom and my girlfriend to go there too.”
Saved me money and time
“Another shop said I needed an expensive heater core replacement. Transmission Plaza diagnosed it correctly as a blend controller, fixed it fast, and didn't lie about the problem.”
Walk-in friendly
“I called to see if I needed an appointment and was told I could walk right in. Got a fast quote at an awesome price and the work was finished super fast.”
Schedule Service
Book an appointment or walk right in
Call for a diagnostics quote and we'll tell you exactly what your vehicle needs.
- Hours
- Monday – Sunday, 8:00 AM – 6:00 PM
- Primary Phone
- (949) 916-8004
- Secondary Phone
- (562) 577-5205