Expert GMC Acadia transmission service in Chicago. Free computer diagnostic, 2-year / 24,000-mile warranty on rebuilds, all years.
We will contact you as soon as a service member is available by call, text, or email.
2007 - 2016: 6-speed automatic (6T70) on 3.6L V6 (FWD/AWD). 2017 - 2024: 6-speed automatic (6T30 on 2.5L; 6T40/6T45 on 2.5L FWD). 2017 - 2024: 9-speed automatic (9T50) on 3.6L V6. AWD models include a rear-wheel coupling (AWD disconnect system on newer models).
The 6T70 in Acadia is a proven unit that develops predictable failure modes. Solenoid failures can often be repaired without a full rebuild. When pump wear is present (slipping when warm), full rebuild is necessary. The 9T50 nine-speed is a newer unit - harshness issues are often software first, then mechanical.
6T70 and 6T40/6T45 use Dexron VI. 9T50 uses Dexron HP. Change every 45,000 miles.
6T70 solenoid: 1 - 2 days. 6T70 rebuild: 2 - 3 days. 9T50 rebuild: 3 - 4 days.
Fluid service and inspection complete the same day. Solenoid or sensor replacement: 1 day. Torque converter or seal repair: 2 - 3 days. Full rebuild with road test: 4 - 6 days. Time estimates assume parts in stock - call (312) 626-8759 to verify availability for your specific vehicle.
Every vehicle needs diagnosis before anyone can promise a repair path. These are the situations we help organize before you decide what to do next.
Tell us when it happens, whether reverse still works, and if warning lights are on. A scan and fluid check come before guessing at a rebuild.
Fluid condition, leak location, and driving distance matter. If the vehicle is slipping badly or overheating, towing may be the safer next step.
A failed solenoid, valve body, converter, or internal clutch problem can lead to very different repair paths. The goal is a clear diagnosis and written estimate.
On a 2007 - 2016 Acadia with 6T70, harsh 1-2 shifts are almost always solenoid A or B failure. Often repairable without a rebuild ($450 - 700).
9T50 gear hunting is a known calibration issue. A TCM software update often helps - try that before mechanical repair.
Likely the rear AWD coupling seal failure - common on older Acadia AWD. Service runs $250 - 450.
2 - 3 business days.
Nearly identical - same 6T70 platform. Parts are interchangeable on same-year models.
Same-day appointments available. Honest estimates, no surprises. We've been doing this since 1987.
