When your 2017 Chevrolet Traverse's 6-speed automatic transmission begins slipping—engine RPM rising without corresponding acceleration—internal issues are developing that require attention. The Traverse's 6T75 transaxle is designed to handle the demands of this large crossover, but problems can develop with age and mileage.
The 6T75 Transmission
The 2017 Traverse uses GM's 6T75 six-speed automatic transaxle, a heavy-duty version of the 6T70 designed for larger vehicles. This front-wheel-drive transmission (with AWD option) uses multiple clutch packs and adaptive shift programming to provide smooth power delivery.
What Slipping Feels Like
Transmission slipping manifests as the engine revving up without the vehicle accelerating proportionally. It may feel like the transmission momentarily loses grip. Slipping can occur during specific gear changes, under hard acceleration, or when the transmission is hot. The condition typically worsens over time.
Common Causes
Low transmission fluid level prevents proper clutch application—check this first. Degraded fluid loses its friction properties, causing clutches to slip. Internal clutch pack wear reduces friction material until clutches can't hold under load. Valve body wear prevents proper hydraulic pressure routing. Torque converter clutch problems can feel like internal slipping.
Diagnostic Steps
Check fluid level and condition with the engine warm and running. The fluid should be light red without a burnt smell—dark, brown fluid with burnt odor indicates damage. Scan for transmission codes that might identify specific clutch circuits or components. Note which gears or conditions trigger slipping to help pinpoint the problem area.
Repair Options
If fluid is simply low without internal damage, topping off resolves the issue—but find the leak. Fluid and filter service costs $200-$350 and may help fluid-degradation issues. If internal damage exists, transmission rebuild runs $2,800-$4,500. Remanufactured transmission replacement costs $3,500-$5,500 installed. Torque converter replacement alone (if that's isolated as the cause) costs $1,200-$2,000.