Transmission Service & Repair
in Sachse, TX
Your transmission is what puts your engine's power to the wheels. Whether it's slipping, shifting hard, or leaking fluid, our experienced technicians will diagnose it right and fix it right.
Call for Transmission ServiceExpert Transmission Service
Automatic & Manual
Transmission Repair
At Pro Automotive Repair, we service both automatic and manual transmissions on all makes and models. From routine fluid exchanges that extend your transmission's life to complex internal repairs that save you from a full replacement, we have the tools and experience to handle it.
Transmission problems don't fix themselves — they get worse. A small shudder today can become a complete failure next month. We'll give you an honest assessment of what your transmission needs and what it doesn't, so you can make an informed decision.
Know the Signs
Common Transmission Problems
Transmission issues rarely fix themselves. If you notice any of these symptoms, bring your vehicle in before a minor problem turns into a major repair.
Hard or Delayed Shifting
If your vehicle hesitates before shifting, slams into gear, or takes a long time to engage when you move the shifter from park to drive, you may have a failing shift solenoid, low fluid level, or degraded transmission fluid that's lost its hydraulic properties.
Slipping Gears
When your transmission slips, the engine revs up but the vehicle doesn't accelerate. You might feel a sudden loss of power or notice the RPMs spike without a corresponding increase in speed. This is often caused by worn clutch packs or low transmission fluid.
Transmission Fluid Leak
Transmission fluid is typically bright red or dark red-brown. If you see spots under your vehicle, a leaking pan gasket, output shaft seal, or cooler line is letting fluid escape. Low fluid starves your transmission of the lubrication and hydraulic pressure it needs.
Grinding or Shaking
A grinding sensation or noticeable shaking when shifting gears points to worn synchronizers in manual transmissions or damaged planetary gear sets in automatics. Worn transmission mounts can also cause vibration that feels like a transmission issue.
Won't Go Into Gear
If your vehicle refuses to engage drive or reverse, the issue could be as simple as a disconnected shift linkage or low fluid, or as serious as internal transmission failure. Don't force it — forcing a stuck transmission causes further damage.
Burning Smell
A sweet, burning odor coming from your vehicle often means overheated transmission fluid. When fluid breaks down from excessive heat, it loses its ability to lubricate and cool internal components. Continued driving can cause permanent damage to clutch packs and seals.
Save Money, Stay Safe
Why Transmission Maintenance Matters
Transmission fluid does more than lubricate — it creates the hydraulic pressure that makes your automatic transmission shift gears. When maintenance is neglected, the damage compounds quickly and the repair costs climb fast.
Old Fluid Loses Its Properties
Over time, transmission fluid breaks down from heat and friction. It loses the friction modifiers that enable smooth shifts and the cooling ability that protects internal components from overheating.
Metal Shavings Contaminate the System
As clutch packs and bands wear, they shed metal particles into the fluid. These shavings circulate through the valve body and solenoids, causing erratic shifting and accelerating wear on every internal component.
Clogged Filter Starves the Transmission
The transmission filter catches debris, but when it clogs, fluid flow drops. Reduced fluid pressure means the transmission can't build enough force to engage clutch packs properly, leading to slipping and overheating.
A Small Service Becomes a Major Rebuild
What starts as a $200 fluid change becomes a $3,000-$5,000 rebuild or complete transmission replacement. By the time you feel symptoms, significant internal damage may already be done.
Most manufacturers recommend transmission fluid service every 30,000-60,000 miles. Check your owner's manual or ask us — we'll look up the interval for your specific vehicle.
Everything Your Transmission Needs
Our Transmission Services
From preventive maintenance to complex internal repairs, we service automatic and manual transmissions on all makes and models.
Transmission Fluid Exchange
We drain the old, degraded fluid and replace it with fresh manufacturer-spec ATF or manual transmission fluid. A fluid exchange removes contaminants and restores proper hydraulic pressure and lubrication throughout the system.
Transmission Filter Replacement
The transmission filter catches metal shavings and debris before they can damage internal components. We replace the filter and pan gasket during fluid services to ensure clean, unrestricted fluid flow to the valve body and clutch packs.
Transmission Diagnostics
Using professional scan tools, we read transmission-specific trouble codes, monitor solenoid operation, check line pressure, and evaluate shift timing. Accurate diagnostics prevent unnecessary repairs and pinpoint the actual failure.
Clutch Replacement (Manual)
A slipping or grabbing clutch makes your manual transmission difficult or impossible to drive. We replace the clutch disc, pressure plate, throwout bearing, and resurface or replace the flywheel as needed for a smooth, reliable engagement.
Torque Converter Service
The torque converter transfers engine power to the transmission through fluid coupling. A failing converter causes shuddering at highway speeds, overheating, and poor fuel economy. We diagnose and replace faulty torque converters to restore smooth operation.
Shift Solenoid Replacement
Shift solenoids control fluid flow to engage and disengage gear sets inside your automatic transmission. When they fail, you get harsh shifts, delayed engagement, or the transmission stuck in one gear. We test and replace individual solenoids or the entire pack.
Transmission Cooler Line Repair
Transmission cooler lines carry hot fluid to the radiator or external cooler and back. Corroded or cracked lines leak fluid and cause overheating, which is the number one killer of automatic transmissions. We repair or replace damaged lines and fittings.
Transmission Mount Replacement
Worn or broken transmission mounts allow excessive movement, causing clunking noises during acceleration or deceleration and putting stress on shift linkage and driveline components. We replace worn mounts to eliminate vibration and protect your drivetrain.
Valve Body Service
The valve body is the brain of your automatic transmission, directing fluid to the right clutch packs at the right time. Worn valves and passages cause erratic shifting, flare-ups between gears, and harsh engagement. We rebuild or replace valve bodies to restore proper shift quality.
Bring It In
Schedule Transmission Service Today
Transmission problems get more expensive the longer you wait. Whether you're noticing a subtle change in how your vehicle shifts or dealing with a major issue, bring it in and let us take a look. We'll diagnose the problem, explain what we find, and give you a straightforward estimate.
No scare tactics, no unnecessary repairs. Just honest advice from technicians who've been doing this for over 15 years. That's how we've built our reputation in Sachse.