Transmission Vehicle Maintenance Vehicle Repair Other. Additional internal diagnosis may be required and will cost extra. This coupon must be presented at vehicle drop-off at the center identified above. The coupon is valid at participating centers only. There is a limit of one coupon per vehicle, and the coupon may not be combined with. Diagnosing Transmission Problems Quickly and Accurately - #transmissionproblem.

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Vehicle Courtesy Check & Diagnostics Services

Transmission codes and sensor data on late-model vehicles is accessed through the OBD II diagnostic connector and the Powertrain Control Module (PCM) diagnostic gateway module. But on some vehicles, the information is often found in a separate Transmission Control. Advanced Automotive Diagnostics & Repair in Whiteland IN, is the premier auto repair shop serving Morgan, Johnson, Shelby, Marion and Hendricks counties since 2013. We specialize in automotive diagnostics and analysis, brakes, front end repair, transmission diagnostics, preventative maintenance, and much more. For all your auto repair needs, contact Advanced Automotive Diagnostics & Repair. Lincoln NE Transmission Problem Diagnosis When your vehicle is having transmission problems, the team at Certified Transmission is here to help you identify the problem quickly before it becomes more complicated, not to mention more costly.

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.

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:

Transmission Diagnostic Shop Near Me

• 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

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.

There are many “mechatronic” parts that control and protect the traditional clutches and planetary gears in modern automatic transmissions. These devices shift the gears, lock the clutches and regulate the fluid pressures.

Tool Up

When overhauling and diagnosing transmission units, you will often need special tools. Back when transmissions where purely mechanical and hydraulic, all you needed was a set of high-pressure gauges to check line pressures. You also needed a vacuum gauge to check the engine’s intake vacuum and the integrity of the vacuum modulator. But with today’s electronic controls, you need a scan tool, scope, and a multimeter.

Transmission codes and sensor data on late-model vehicles is accessed through the OBD II diagnostic connector and the Powertrain Control Module (PCM) diagnostic gateway module. But on some vehicles, the information is often found in a separate Transmission Control Module (TCM) or Body Control Module (BCM). Either way, you’ll need a scan tool to access fault codes and operating data.

A scan tool can also help you check for communication faults between the PCM and transmission controller if the vehicle has separate computers. Problems here will typically cause the transmission to go into a “limp in” mode that may lock it in 2nd gear.

Some electronic transmission problems may or may not set a fault code and turn on the MIL lamp, so it’s important to always scan the PCM or transmission module for codes if there’s a transmission-related complaint or driveability issue. Some engine sensor failures can also affect the operation of the transmission. So, these sensors should also be checked.

If you find a transmission fault code, you may have to check the resistance of a solenoid in the valve body, its operating voltage or the­ ­frequency of its control signal from the ­computer. This will require a digital multimeter (DMM) that can read voltage, resistance and ­frequency or dwell.

You’ll also need the applicable service information that includes wiring schematics and OEM diagnostic charts with test specifications for all the components that need to be checked. This kind of information can be found in OEM service manuals, on OEM websites (daily one-time access fees are typically $15 to $25), or through online technical information service providers. You should also check for any technical service bulletins (TSBs) that may be related to the transmission problem. In some cases, it may be necessary to reflash the PCM or transmission module to cure a particular fault.

Transmission Diagnostic Equipment

Diagnostic Strategies and Transmissions

It’s often what is not displayed on the scan tool that will lead you to your final diagnosis when using a scan tool to diagnosis a drivetrain problem. The modern transmission is one of the most connected components on a vehicle. If a PCM or TCM can’t see inputs like engine speed, load or throttle position, it will assume the worst and put the transmission into a safe or limp mode.

The transmission does not have discreet sensors connected to the throttle body, crankshaft or intake manifold. Instead, the transmission shares information with the engine control and other modules in the vehicle using a serial data bus. Most vehicles manufactured after 2004 put the TCM or PCM module on the hi-speed two-wire CAN network along with BCM and ABS modules.

The topology for these networks is typically a loop. If a module is not operating, the existing modules can still communicate on the bus. When you’re using your scan tool to solve a transmission problem, you may have to look at the PIDs or datastream from the ECM or BCM to see what modules are talking on the bus.

If you can’t communicate with a transmission control module with your scan tool, look for transmission information in the connected modules. The BCM will monitor information from the TCM on gear position so it can tell the instrument cluster what gear to display for the driver.

Transmission Diagnostic Machine

It can also work the other way. If a TCM is not able to communicate with the ECM, looking at the transmission-related PIDs for calculated engine load, throttle position and manifold air pressure may show that the ECM is not communicating on the network.

ASE PS2 Test Preparation Guide: Automatic Transmission/TransaxleAutomatic

A helpful review focusing on automatic transmission components for the ASE PS2 Test.

Transmission Diagnostic

Diagnosing Serial Data Buses

Transmission Diagnostic Chart

If serial data buses did not exist, a wiring harness would have to be five times its normal size and use twice as many sensors to deliver the same level of functionality and safety we see in the modern vehicle. For example, take a brake pedal sensor. On a modern vehicle, the position of the…