Basic Parts of a Transmission. While there are many, many little parts inside, your transmission is. Description of diagnostic codes, system responses to faults, and troubleshooting. Concerning Allison Transmission products. This publication is revised periodically to include improvements, new models, special tools, and procedures. A revision is indicated by a new date on the title page and in the lower left corner of the rear cover. 💯ENG/AT/ABS/SRS DIAGNOSES: LAUNCH VII+ OBD2 scanner can easily access to the Engine, Transmission, ABS, and SRS to retrieve their DTCs, text or graphic live data stream and other ECU information. 🙋‍♂️Once the detected problems are fixed, you can use this scan tool to clear the DTCs, and then the warning light will be off automatically.
Vehicle Courtesy Check & Diagnostics Services
Fixing your transmission problem right, starts with diagnosing your problem right! That's why we will perform our exclusive Transmission Vehicle Courtesy Check service on every car before we do any transmission repair.
We have the technology and the expertise to pin-point the root of your transmission problems so we only repair what needs fixing and nothing more. Over half of the time, we'll discover your transmission only requires a minor repair. It's why AAMCO is the most trusted name in transmissions and has been for over 50 years.
Our exclusive Vehicle Courtesy Check & Diagnostics Services includes ALL of these checks:
- Check the level and condition of your transmission fluid
- Check the level and condition of transfer case and differential fluid, where applicable.
- Perform a road test, to experience first-hand any problems you have noticed and to evaluate your car's performance including:​
- Initial engagements
- Each drive range
- Upshift timing
- Upshift quality
- Downshift timing
- Downshift quality
- Passing gear
- TCC engagement
- Neutral
- Reverse
- Noises
- Vibrations
- 4x4 performance
- Park-hold
Your vehicle will be placed on a lift to inspect the controls under the vehicle for any possible cause of the problem external to the transmission including:
- Shift linkage or cable
- Vacuum connections
- TV/detent cable/linkage
- Engine performance
- Harness connections
- Ground connections
- Engine idle
- Mounts
- Final drive
- Axles and shafts
- U-joints/CV joints
- Fluid retention
- Pan gasket
- Wire condition
- Scan the computer for trouble codes.
Transmission Diagnostic Equipment
Your local AAMCO expert technician will diagnose many transmission problems through this extensive external check and recommend the right repair for you. But AAMCO expert diagnostics don't stop there. Even if an initial check doesn't diagnose your problem, we still won't recommend a rebuilt transmission service until we know EXACTLY what is causing your problem.
Computer and Internal Diagnostics
Our advanced computer and internal diagnostics are the next level of diagnostics that ensure AAMCO technicians will only fix what needs fixing. Many transmission problems start in the computer system of today's highly technical, computer-controlled vehicles, your transmission receives the wrong signals from your vehicle's computer system. The AAMCO Computer Diagnostic Service is performed to determine if an electronic component is affecting your transmission's shifting or overall performance and includes:
- Using a computer system scanner to retrieve any trouble codes and to determine the probable cause. All critical computer systems in the vehicle are checked for trouble codes, because a variety of systems could cause drivability issues.
- Reviewing the computer system data against our proprietary AAMCO technical database - the most extensive transmission computer diagnostic source available anywhere.
- Connecting the AAMCO Kwiktest™ PlusBox to see whether the problem is inside or outside of the transmission in the computer system.
Your certified AAMCO center technician will also:
- Check the electronic components
- Check the solenoids and sensors
- Check the wiring that effects the transmission, solenoids and sensors
Transmission Diagnostic Free
Your AAMCO certified technician can then determine if an electronic component or part needs to be replaced, and make a recommendation for whatever service is necessary. It is our comprehensive diagnostic approach that sets AAMCO apart, so that you only get the repair you need and your car, truck or SUV is back on the road as soon as possible.