Transmission Shop in Clovis, CA
When a general mechanic reaches the limit of what they know about transmissions, Clovis drivers with performance builds and classic cars call us instead. B & M Custom Transmissions has been diagnosing, repairing, rebuilding, and building performance transmissions since 1963, and we know the difference between a quick fix and a transmission built to actually survive what you’re asking it to do.
A Transmission Specialist for Clovis Drivers, Not a General Repair Shop
Clovis has grown from its Old Town roots along Pollasky Avenue into one of the Central Valley’s larger suburban cities, and with that growth has come a lot of general auto repair chains that will happily quote you a transmission job alongside an oil change and a brake pad swap. That works fine for a daily commuter. It does not work for a built 4th gen Camaro, a towed trailer rig headed up Highway 168 toward the Sierra foothills, or a numbers matching muscle car that’s spent more of its life under a cover than on the road.
We are a transmission focused shop. Transmission diagnostics, repair, rebuilds, and performance builds are the entire business, not a service bay tacked onto tires and alignments. Clovis drivers who search out a specialist usually already know their vehicle needs more than an off the shelf solution, and that’s the customer we’re built for.
Why a Proper Diagnosis Comes Before Repair, Rebuild, or Replace
A transmission problem should always start with a full diagnostic, because slipping, hard shifting, and fluid leaks can come from a $40 sensor or a $4,000 internal failure, and guessing wrong wastes both time and money. We pull codes, inspect fluid condition, check line pressure, and road test the vehicle before we ever recommend a repair path, so the fix matches the actual problem instead of the symptom.
For a modified or classic vehicle in particular, a generic scan tool often cannot even read the transmission correctly, since many of these builds run non-factory computers, aftermarket valve bodies, or transmissions that were never original to the vehicle. That’s where a shop that works on performance and classic transmissions every day has an advantage over a general mechanic who sees one every few months.
Transmission Repair and Rebuild Services
Whether your transmission needs a targeted repair or a full rebuild, our process is built around finding the actual cause before we start turning wrenches.
Transmission Diagnostics and Repair
We identify the source of shifting problems, slipping, leaks, overheating, and unusual noises, then repair the specific components causing the issue rather than replacing more than the vehicle needs.
Transmission Rebuilds
A rebuild means full disassembly, inspection of every internal component, replacement of worn or failed parts, and reassembly to a standard built for continued, dependable service, not just enough to pass a test drive around the block.
Performance Transmission Builds
For modified engines, added horsepower, or a vehicle built for the track or the strip, we build the transmission around how you actually drive the car, not around what came stock from the factory.
Classic Car Transmission Services
Classic and muscle car transmissions bring their own parts sourcing challenges and tolerances that a shop unfamiliar with older platforms will not have on hand. We work on these applications regularly, including restoration projects where the transmission needs to match the era and intent of the build.
Performance and Classic Car Transmissions: Our Specialty
This is where most transmission shops in the Fresno and Clovis area stop being useful, and where we start. A specialty vehicle, whether it’s a daily driven street/strip build or a garage kept classic headed to the next Old Town Clovis car show, needs a transmission built around its intended use, not a parts store rebuild kit installed the same way it would be for a minivan.
- Performance transmission builds matched to horsepower, torque converter selection, and how aggressively the vehicle will actually be driven.
- Muscle car transmissions for classic domestic platforms, built to handle the power these engines were designed to make.
- Transmission rebuilding for restoration projects, where correctness and durability matter as much as function.
- Custom transmission applications for vehicles that have been modified enough that a stock solution no longer fits.
- Transmission upgrades for modified vehicles, including trucks, 4x4s, and towing setups that need more capability than they left the factory with.
We treat these builds as their own category of work, because they are. A classic car transmission specialist thinks about parts availability, period-correct behavior, and long-term drivability differently than a shop that only sees late model daily drivers.
Signs Your Transmission Needs Attention
- Slipping between gears or delayed engagement
- Hard or rough shifting, especially when the transmission is cold
- Fluid leaks or fluid that smells burnt
- Whining, clunking, or grinding noises
- Warning lights or the transmission going into limp mode
- Reduced power delivery under load, such as towing or hard acceleration
If you’re noticing any of these on a Clovis commute, a haul out toward the foothills, or a weekend at the track, the sooner it’s diagnosed, the more options you typically have between repair, rebuild, and replacement.
What Clovis Driving Conditions Mean for Your Transmission
Clovis summers regularly push past 100 degrees, and sustained heat is one of the fastest ways to break down transmission fluid and accelerate wear on internal components, especially in a vehicle that’s already working harder than stock. Stop and go traffic along Herndon and Shaw, combined with regular trips up Highway 168 toward the Sierra foothills for weekend recreation, adds grade and load that a factory transmission calibration was not always built to handle gracefully, particularly in a modified or heavier vehicle.
For classic and muscle cars that spend part of the year garaged, seasonal storage brings its own issues: seals dry out, fluid degrades even when the car isn’t driven, and a transmission that felt fine in the fall can slip or hesitate when it comes back out for spring. We see this pattern often enough in Fresno County classic car owners that it’s part of what we check for on any older vehicle that’s been sitting.
Our Process
- Diagnostic and road test. We identify the actual cause before recommending a repair path.
- Straightforward explanation and options. You’ll know what’s wrong, what it takes to fix it, and what repair, rebuild, or replacement each involve.
- The work itself. Repairs, rebuilds, and performance builds are done in house by technicians who work on transmissions every day.
- Test and verification. Every job is road tested before it goes back to you.
Why Clovis Drivers Choose a Specialist Over a General Mechanic
A general repair shop can rotate your tires, change your oil, and handle a brake job without issue. Transmissions are a different animal, especially once you introduce performance modifications or a classic drivetrain that hasn’t been in production for decades. We’ve been family owned and transmission focused since 1963, across three generations, because it takes that kind of specialization to consistently get performance and classic transmission work right.
Common Questions From Clovis Drivers
How do I know if I need a transmission repair or a full rebuild?
You need a full diagnostic to answer that with confidence, since the same symptom, like slipping, can point to a minor repair or significant internal wear. As a general pattern, isolated issues like a bad sensor or solenoid usually mean a repair, while widespread wear, metal contamination in the fluid, or multiple failed components typically point to a rebuild.
How long does a transmission rebuild take?
Timelines depend on parts availability, especially for classic or less common applications, and on how extensively the transmission needs to be rebuilt once it’s fully inspected.
Can you work on a transmission that’s already been modified?
Yes, we regularly work on modified and performance transmissions, including custom valve bodies, non-factory torque converters, and transmissions swapped in from other applications. We’ll evaluate what’s already been done as part of the diagnostic.
Is it worth rebuilding a transmission in an older classic car instead of buying a replacement?
For most classic and muscle car owners, rebuilding is worth it because it preserves the correct transmission for the vehicle and can be built specifically to handle the car’s power and intended use, something a generic replacement often can’t match.
Talk to a Transmission Specialist Serving Clovis, CA
Whether it’s a daily driver that’s started slipping, a performance build that needs a transmission matched to its power, or a classic car that deserves better than an off the shelf rebuild, we’re ready to take a look.