Owners of the 2016 Chevrolet Traverse often praise its spacious cabin and versatile capabilities, but the automatic transmission has been a point of contention for many drivers. While the 6T70 and 6T75 units are generally robust, a specific subset of these vehicles has experienced disruptive symptoms that point to potential internal wear or software calibration issues. These problems can manifest as harsh shifting, unexplained slipping, or a complete failure to engage drive, turning a routine commute into a source of significant stress. Understanding the mechanical nuances and common failure patterns is the first step toward protecting your investment and ensuring long-term reliability.
Identifying the Core Transmission Issues
The 2016 Traverse transmission problems typically cluster around specific mechanical and electronic failures that become noticeable under various driving conditions. Owners frequently report a delay or hesitation when moving from Park to Drive, which is often a precursor to more serious internal damage. Unlike older hydraulic systems, modern transmissions rely heavily on sensor data and precise pressure, meaning a small glitch can cascade into a major performance issue. Recognizing the early warning signs allows for intervention before a simple repair evolves into a full transmission rebuild or replacement.
Symptom 1: Rough Shifting and Gear Slipping
One of the most prevalent complaints is a noticeable harshness during gear changes, particularly between second and third gear under moderate acceleration. This shock-like sensation indicates that the transmission is not modulating line pressure correctly, causing clutches to engage too abruptly. In more severe cases, drivers describe a sensation of the engine revving without a proportional increase in speed, known as transmission slip. This occurs when the internal clutches or bands are worn, and metal-on-metal contact begins to degrade the friction material at an accelerated rate.
Symptom 2: Electrical and Sensor Failures
The transmission control module (TCM) relies on data from the throttle position sensor and vehicle speed sensor to determine the optimal shift points. A malfunction in these sensors can trick the TCM into commanding incorrect shift patterns, resulting in erratic behavior or limp mode activation. When the vehicle enters limp mode, it restricts movement to a specific gear to prevent further damage, effectively turning the Traverse into a heavy, slow-moving hazard on the road. Diagnosing the issue requires a professional scan tool to read the fault codes stored in the module’s memory.
Common Repair Solutions and Costs
Addressing these issues usually involves a tiered approach, starting with the least invasive procedures and escalating to mechanical overhauls if necessary. A transmission fluid and filter change is often the first recommended step, as old fluid can lose its viscosity and fail to lubricate critical components properly. However, if the fluid is burnt or smells acrid, it is a strong indicator that internal wear has already occurred, necessitating a more aggressive repair strategy.
Software Updates and Sensor Replacement
Before spending thousands on mechanical repairs, technicians will often reflash the TCM software to update the shift strategy. General Motors issued technical service bulletins (TSBs) for certain model years to tweak the logic and reduce harsh shifts. If the diagnosis points to a faulty sensor, replacing the throttle position sensor or the input speed sensor can resolve the issue quickly and inexpensively. These electronic fixes are relatively straightforward and can restore the driving dynamics to near-new condition if the problem is purely software or sensor-related.
Mechanical Overhaul and Component Wear
When slip and harsh shifting are caused by internal mechanical failure, a rebuild becomes inevitable. This process involves dropping the transmission pan, replacing the filter, and inspecting the clutch packs and bands for wear. Worn piston seals and clutch material debris circulating in the fluid can exacerbate the damage, leading to metal shavings visible in the pan magnet. For the 2016 model, common culprits include the accumulator spring and the pressure control solenoid, which regulate the hydraulic pressure that engages the gears.
