Ford & TorqShift
4R70 family • E4OD / 4R100 • 5R110W • 6R80 • 6R140 • 10R80 • 10R140Work-truck, diesel, gas, classic, and late-model Ford applications.
Explore 6R140 rebuilds →Browse matching parts →Diagnosed • Rebuilt • Installed in-house
Transmission work stays under one roof.
From the first diagnostic check through removal, teardown, rebuilding, and installation, A-1 gives you one local team and one clear repair plan.
In-houseDiagnosis through installation
Stock or customMatched to the vehicle’s use
Gas & dieselDaily drivers, work trucks, and fleets
Inside the A-1 transmission shop
Transmission service and upgrades handled in-house.
The gallery includes an E4OD rebuild, a completed 6R140, transmission components in our parts washer, and a Mishimoto transmission cooler installation on a 2019 Ford F-250.
Start with the complaint
Diagnose first. Build the right repair second.
Not every shift complaint means the entire transmission has failed. Electrical faults, hydraulic wear, valve-body problems, converter issues, leaks, and internal damage can feel similar from the driver’s seat. We identify the exact transmission and diagnose the cause before recommending a rebuild or another repair.
Send your symptoms and vehicle information →Call when you notice:
- Slipping or engine flare between shifts
- Harsh, delayed, or erratic shifts
- No forward or reverse engagement
- Shuddering, vibration, or converter complaints
- Transmission fluid leaks or overheating
- Warning lights, limp mode, or transmission codes
Common transmission families
Broad coverage for the vehicles we see most.
This is not the full list. Call with the VIN or transmission code if your unit is not shown.
GM & Chevrolet/GMC
4L60E / 4L65E / 4L70E • 4L80E / 4L85E • 6L80 / 6L90 • 8L90 • 10L80 / 10L90 • 10L1000Daily-driver, work-truck, towing, heavy-use, and performance applications.
Browse matching parts →Allison
Allison 1000 • 2000 • 2400 familiesFive- and six-speed rear-wheel-drive applications, including diesel work trucks.
Explore Allison 1000 rebuilds →Browse matching parts →Dodge, Ram & Aisin
46RE / 47RE / 48RE • 45RFE / 545RFE • 65RFE / 66RFE / 68RFE • AS68RC / AS69RCCummins, Hemi, work-truck, and custom-build applications.
Explore 68RFE rebuilds →Browse matching parts →What an in-house build can involve
Internal wear is inspected—not guessed at.
Parts and upgrades vary by unit, damage, vehicle weight, tire size, power level, towing load, and intended use. A-1 confirms the build plan with you before ordering the final combination.
Diagnosis & controls
Scan data, electrical checks, solenoids, sensors, wiring, and hydraulic control concerns.
Valve body
Wear checks and repair planning for valves, bores, separator plates, accumulators, and pressure-control circuits.
Friction elements
Clutches, steels, bands, pistons, seals, and related apply components are inspected during teardown.
Pump & hard parts
Pump components, drums, hubs, shafts, gears, planetaries, bushings, bearings, and sprags are checked for damage or wear.
Torque converter
Converter condition and application are reviewed so the approved repair matches the vehicle and intended use.
Custom build strategy
Stock replacement, work-truck, towing, and performance needs are discussed before parts are ordered.
A clear rebuild process
Know what happens next.
- 01Identify & diagnose
We verify the vehicle, transmission family, complaint, codes, fluid condition, and the testing needed to isolate the fault.
- 02Remove & inspect
When a rebuild is the right path, the unit is removed and disassembled so internal wear and damage can be evaluated.
- 03Approve the build plan
We explain the findings, required hard parts, converter needs, and stock or custom build options before final parts are ordered.
- 04Rebuild & install
The approved unit is rebuilt and installed by the same shop handling the repair.
- 05Verify the repair
Final checks focus on operation, shift quality, leaks, fluid level, and the original complaint before pickup.
Correct identification matters
Help us match the right unit and parts.
Transmission names can cover multiple designs, generations, valve bodies, electronics, and internal calibrations. Send as much of this information as you have; we will verify the rest.
01 Year, make, model, and engine02 Last eight digits of the VIN03 Mileage and 2WD or 4WD04 Transmission code or tag, if known05 Symptoms, warning lights, and scan codes06 Tire size, tuning, power, towing, or work useSend transmission details
Transmission rebuild questions
Straight answers before the work starts.
Do you rebuild transmissions in-house?
Yes. A-1 handles diagnosis, removal, rebuilding, and installation under one roof so one team stays accountable for the job.
Do you work on diesel truck transmissions?
Yes. We service common Power Stroke, Duramax, and Cummins transmission families, including Ford TorqShift, Allison, Ram RFE/RE, and Aisin units.
Does a harsh or delayed 10R140 shift automatically mean it needs a rebuild?
No. On some 2020–2022 Ford Super Duty applications, Ford service information calls for exact symptom and build-date checks and may require main-control break-in or adaptive-learning procedures before internal repair. A-1 checks the vehicle, codes, fluid, controls, and operating complaint before recommending a rebuild.
Can you quote a rebuild over the phone?
We can discuss the likely next step, but a reliable estimate depends on identifying the exact unit, diagnosing the complaint, and—when needed—inspecting internal damage.
Do customers travel to A-1 for transmission builds?
Yes. A-1 serves DFW and North Texas and considers serious specialty builds from across Texas or other states. Call before traveling so we can confirm the unit, vehicle use, requested build, schedule, and transportation plan.
What information should I send first?
Send the year, make, model, engine, mileage, last eight digits of the VIN, 2WD or 4WD, symptoms, warning lights or codes, and how the vehicle is used.
Transmission help for DFW and beyond
Tell us what the vehicle is doing.
Have the year, make, model, mileage, last eight of the VIN, and a short description of the symptoms ready. Traveling customers should also share their location and transportation plan.