West Palm Beach · Palm Beach & Broward · South Florida
Truck Transmission Repair
Mobile 24/7 service across South Florida. We come to you — I-95, Turnpike, job sites, fleet yards. No tow needed.
30–45 min
Avg Response Time
4.9★
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24/7
Always Available
7+
Engine Platforms
A transmission problem stops your truck dead. Whether it's grinding gears, slipping out of range, or throwing fault codes, Albert's Road Service diagnoses and repairs manual, automated manual, and automatic transmissions on-site across West Palm Beach and South Florida. We work on Eaton Fuller, Detroit DT12, Volvo I-Shift, Allison, and PACCAR TX-12 — the transmissions that move freight in this country.
Transmission Services
- Manual transmission service (Eaton Fuller 10/13/18 speed)
- Automated manual transmissions (Eaton UltraShift, Detroit DT12, Volvo I-Shift, PACCAR TX-12)
- Allison automatic transmissions (1000/2000/3000/4000 series)
- Transmission fluid service and filter changes
- Shift tower and linkage adjustment
- Speed sensor and range sensor diagnostics
- Transmission ECM fault code diagnosis
- Clutch-to-transmission interface problems
- Torque converter diagnosis and service
- PTO (power take-off) engagement issues
Call 561-475-8052 for mobile transmission repair.
Know the Warning Signs
Symptoms That Mean You Need Transmission Repair
Grinding or growling in gear
Metal-on-metal noise while driving in gear points to worn synchronizers in a manual box, damaged gear teeth, or low fluid. In an Allison automatic, internal grinding usually means planetary gear or bearing damage. This noise gets louder under load and won't fix itself.
Slipping out of gear
The transmission pops out of gear under load or on deceleration. In manual transmissions, this typically indicates worn detent springs, shift rail poppets, or gear engagement dogs. In automatics, it can mean internal clutch pack failure or a faulty range selector.
Harsh or delayed shifts
An automated manual that bangs into gear or an Allison that hesitates before shifting indicates solenoid problems, low fluid pressure, or worn clutch packs. A DT12 or I-Shift that shifts rough often has a shift actuator issue or needs an adaptive learn reset.
Check transmission light
The dash warning light means the transmission ECM has logged a fault code. This could be anything from a speed sensor to an internal pressure problem. Don't ignore it — pull the codes before a minor issue becomes a major failure.
Fluid leaks under the truck
Transmission fluid pooling under the truck means a failing seal, cracked housing, or loose cooler line. Low fluid is the fastest way to destroy a transmission. Red fluid is Allison ATF; gear oil puddles are from manual or automated manual boxes.
Won't go into gear
Complete inability to select gears means something has failed. In a manual, it could be the clutch not releasing, a broken shift fork, or a seized synchronizer. In an automated manual, the shift actuator or clutch actuator may have failed. In an Allison, internal hydraulic failure or a TCM fault can lock you out of all ranges.
Root Cause Analysis
Common Causes of Transmission Failure
Diesel engines are built for a million miles — but these conditions accelerate wear and cause premature failure.
Low or contaminated fluid
This is the number one transmission killer. Low fluid starves bearings and gears of lubrication. Contaminated fluid — full of metal particles, burnt, or water-logged — accelerates wear on every internal component. Regular fluid checks prevent most catastrophic failures.
Worn synchronizers
In manual transmissions like the Eaton Fuller, synchronizers wear over hundreds of thousands of shifts. Worn synchros cause grinding on engagement, especially in the most-used gears. Drivers who don't double-clutch or who force gears wear synchros faster.
Solenoid failures
Allison automatics rely on solenoids to control shift timing and pressure. Failed solenoids cause harsh shifts, delayed engagement, or complete loss of a gear range. Heat and contaminated fluid are the main solenoid killers.
Shift actuator problems
Automated manual transmissions use electric or pneumatic actuators to select and engage gears. When these actuators wear out or lose calibration, you get missed shifts, gear hunting, or complete shift failure. The DT12 and I-Shift are particularly sensitive to actuator calibration.
Overheating from towing and stop-and-go
Heavy loads in slow traffic push transmission temperatures past safe limits. Allison automatics in vocational trucks running through West Palm Beach traffic overheat regularly. Once the fluid overheats, it loses its protective properties and internal damage accelerates.
Worn input/output shaft bearings
Main shaft and countershaft bearings wear over time, especially if fluid maintenance has been neglected. Bearing failure causes noise first, then metal contamination of the fluid, then cascading damage to gears and other bearings.
How We Work
Our Diagnostic Process
We don't guess at parts — we diagnose the root cause before turning a single wrench.
Driver interview
We ask when the problem happens, what gear, loaded or empty, cold or hot. A transmission that slips only in fifth gear under load is a completely different diagnosis than one that won't shift at all when cold. The driver's input narrows the search immediately.
Fault code pull from transmission ECM
We connect to the transmission controller and pull active and stored codes. Allison DOC, Detroit DDDL, Volvo VCADS, and PACCAR ESA each speak to their respective transmissions. Fault codes tell us what the ECM has flagged — sensor faults, pressure faults, temperature warnings, actuator errors.
Fluid level and condition check
We check fluid level and examine the fluid itself. Color tells a story: bright red ATF is healthy, brown or black means it's burnt. We smell it — burnt fluid has a distinct acrid odor. We look for metal particles on the drain plug magnet. Metal shavings mean internal wear is happening.
Road test or stationary test
We evaluate shift quality, timing, and engagement. On automated manuals, we monitor shift duration and clutch engagement parameters through the diagnostic tool. On Allison automatics, we watch line pressure and clutch apply timing. Stationary tests check PTO engagement and range selection.
Sensor testing
We test speed sensors, range sensors, and temperature sensors individually. A bad output speed sensor on an Allison will cause erratic shifting or limp mode. A failed range sensor on a DT12 prevents gear selection. These are common failure points and relatively inexpensive to replace.
Our Standards
Our Repair Approach
OEM-spec fluids
We use Allison TES 295 approved fluid for Allison transmissions and Eaton PS-386 for Fuller manual boxes. The wrong fluid causes shift quality problems, seal degradation, and voided warranties. We don't cut corners on fluid spec.
Proper fluid exchange procedures
A transmission fluid service isn't just draining and refilling. We replace the filter, clean the pan magnet, and on Allison units we perform a complete fluid exchange to remove old fluid from the torque converter and cooler lines. Partial changes leave contaminated fluid circulating.
Clutch adjustment for manual boxes
On manual transmissions, clutch interface problems often masquerade as transmission issues. We verify clutch free play and adjustment before opening the transmission. A misadjusted clutch causes gear clash that gets blamed on the transmission.
Adaptive learn resets
After any repair on an automated manual transmission, we perform an adaptive learn reset. The DT12, I-Shift, UltraShift, and TX-12 all learn shift parameters over time. After a repair, the old learned values cause poor shift quality until the system relearns — or until we reset it and let it start fresh.
Cooler line and fitting inspection
Transmission cooler lines and fittings are common leak points. We inspect all external connections during every transmission service. A slow cooler line leak drops fluid level gradually, and by the time you notice it, damage may already be done.
Electrical connector inspection
Corroded or damaged connectors cause intermittent faults that are hard to reproduce. Florida's salt air and humidity accelerate connector corrosion. We inspect and clean all transmission harness connectors during diagnosis.
☀️ South Florida Conditions
Florida-Specific Considerations
Running a diesel engine in South Florida is different from running one anywhere else. Year-round heat, humidity, and salt air create unique challenges our technicians are specifically trained for.
Heat accelerates fluid breakdown
Transmission fluid has a finite thermal life. Every degree above normal operating temperature shortens that life. Florida's ambient heat means your transmission starts hotter and stays hotter. Fluid that lasts 150,000 miles in a northern climate may need changing at 100,000 down here.
Stop-and-go delivery routes stress automatics
Allison automatics running delivery routes through Palm Beach and Broward counties shift thousands of times per day. Every shift generates heat and wear on clutch packs. A long-haul truck in top gear on I-10 across Texas puts almost zero wear on the transmission compared to a truck making 30 stops across West Palm Beach.
Humid conditions cause condensation
Florida's humidity introduces moisture into transmission housings through breather vents. Water in transmission fluid causes corrosion on bearing surfaces, accelerates seal degradation, and reduces the fluid's ability to carry load. This is a slow killer that you don't notice until bearings start failing.
Florida's flat terrain means less engine braking
Mountain driving lets the engine do braking work. Florida is flat — all braking load goes through the service brakes and transmission. Trucks running heavy through South Florida rely more on transmission retarders and converter braking than trucks in hilly terrain, which puts additional thermal stress on the transmission.
Mobile Truck Transmission Repair and Diagnostics
Many transmission problems are electrical or software-related — not mechanical. A faulty speed sensor, a wiring issue, or a TCM code can trigger limp mode, harsh shifts, or no-shift conditions that FEEL like a transmission failure but can be fixed roadside without pulling the transmission.
We diagnose on-site with OEM-level laptop diagnostics before recommending any repair. This saves you from unnecessary teardowns and inflated shop bills. Our transmission repair capabilities include Allison automatic transmission diagnostics (Allison DOC), Eaton Fuller manual and automated manual transmission service, Volvo I-Shift and Mack mDRIVE automated transmission repair, ZF and Mercedes-Benz automated transmission diagnostics, clutch and clutch actuator replacement, shift linkage and cable adjustment, transmission oil and filter service, and speed sensor and wiring repair.
When a transmission does need internal repair or replacement, we are honest about it and can refer you to a trusted transmission specialist. But in our experience, 40-60% of "transmission problems" are actually sensor, wiring, or software issues that we resolve on-site. Call 561-475-8052 for mobile truck transmission diagnostics in West Palm Beach.
Service Area
45-Mile Radius from West Palm Beach
We cover 3 counties and 24+ cities — if you're in South Florida, we come to you.
Palm Beach County
- West Palm Beach
- Jupiter
- Palm Beach Gardens
- Riviera Beach
- Lake Worth
- Boynton Beach
- Delray Beach
- Boca Raton
- Wellington
- Royal Palm Beach
- Greenacres
- Belle Glade
Broward County
- Fort Lauderdale
- Pompano Beach
- Deerfield Beach
- Coral Springs
- Margate
- Coconut Creek
- Lauderhill
St. Lucie County
- Port St. Lucie
- Fort Pierce
- Stuart
Transmission Repair problem? We fix it on-site.
Mobile 24/7 repair across Palm Beach, Broward & St. Lucie counties.
Request Transmission Repair
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Frequently Asked Questions
How do I know if my truck needs transmission repair vs clutch repair?
Can you rebuild a transmission on-site?
What's the difference between a manual and automated manual transmission?
How much does Allison transmission service cost?
Do you carry transmission parts on your truck?
Truck Broken Down Right Now?
Our mobile diesel mechanics are standing by 24/7. Fast response times across South Florida.
Call 561-475-8052