Apex Automotive & Emissions
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Transmission

Automatic Transmission Diagnostics

P0700, P0705, P0730-P0735 transmission codes signal shifting faults. We diagnose solenoids (P0750-P0760), speed sensors, valve body using OEM factory software. Expert TCM specialist. Call.

An illuminated Check Engine Light or Transmission Warning Light, paired with erratic shifting or slipping gears, often signals a serious transmission issue that demands expert attention. At Apex Automotive in Gilbert, AZ, we specialize in advanced automatic transmission diagnostics, focusing on GM, Ford, and Stellantis vehicles. Understanding the unique transmission systems and fluid specifications of these manufacturers is critical, especially in Arizona’s extreme heat, which accelerates transmission fluid breakdown and can lead to premature wear or failure.

Led by your personal mechanic, David Jr., our diagnostic-first approach ensures that we never guess when it comes to your vehicle’s health. We use the same OEM factory software as dealerships to connect directly with your vehicle’s Transmission Control Module (TCM). This allows us to retrieve proprietary manufacturer codes and detailed data streams that generic OBD-II scanners often miss. Such precision is essential for diagnosing complex issues involving the valve body, solenoids, torque converters, and speed sensors.

Our process includes meticulous data analysis, functional testing, and thorough road tests to confidently identify the root cause before recommending any repairs. Whether your vehicle displays a common P0700 code or a specialized solenoid performance code, our expertise enables us to provide a clear and accurate diagnosis tailored to your make and model. We also emphasize the importance of using the correct transmission fluid, as specified by the manufacturer, to maintain optimal performance and longevity under Arizona’s harsh climate.

At Apex Automotive, transparency is key. We walk you through our findings in plain English, explaining your options without pressure or unnecessary upselling. We are not a parts-cannon shop; we are diagnostic specialists committed to honest assessments that save you time and money by avoiding needless repairs. By appointment only, we treat your vehicle like our own—delivering expert care and peace of mind. Trust Apex Automotive to get your transmission running smoothly again, right the first time.