Expert Infiniti Q50 transmission service in Chicago. Free computer diagnostic, lifetime warranty on rebuilds, all years.
2014β2017: 7-speed RE7R01A automatic (2.0T 4-cyl or 3.7L V6) 2018+: 7-speed RE7R01A (3.0T V6 twin-turbo)
RE7R01A solenoid pack: replacement resolves most cases ($700β1,000). Full rebuild if clutch packs are damaged or valve body bore wear is extensive. 3.0T: more aggressive fluid service intervals.
Nissan Matic-W or Matic-S (confirm for year)
Solenoid: 1β2 days. Rebuild: 3β4 days.
"Honest diagnosis, fair price, and the repair was done right. Chicago Transmission has been my go-to for years. Wouldn't trust anyone else with my car."
"The free diagnostic alone was worth the trip. They found the problem fast, gave me a written estimate, and completed the work on time. Exceptional service."
"Family owned and it shows. They treated my car like it was their own. The lifetime warranty on my rebuild gives me total peace of mind. Highly recommend."
RE7R01A solenoid pack failure β the most common Q50 transmission issue. Pull codes; P0750βP0770 confirm it. $700β1,000 for solenoid replacement.
Likely TCC shudder from the high-torque twin-turbo application. Fluid exchange first, then converter assessment.
Every 30,000 miles, every 20,000 if you drive the 3.0T hard.
3β4 days.
The RE7R01A in the Q50 is an evolution of the RE7R01A in the G37. Same family, similar failure modes.
Same-day appointments available. Honest estimates, no surprises. We've been doing this since 1987.