Stuck valves, varnished solenoid screens, and worn check balls cause harsh shifts, limp mode, and pressure codes. We diagnose and repair or replace valve bodies for all makes.
"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."
Yes, in many cases. If the failure is due to varnish contamination from neglected fluid, ultrasonic cleaning with new seals and check balls can restore function without replacing the entire unit. Replacement is needed when valve bores are worn beyond tolerance or when casting damage has occurred.
Most valve body repairs or replacements are completed in 1–2 business days. We stock remanufactured valve bodies for common GM, Ford, Toyota, and Honda applications.
If the harsh shifts are caused by valve body issues — which a diagnostic will confirm — yes. If the cause is clutch pack wear or a failed solenoid outside the valve body, additional work may be needed. We diagnose before recommending any repair.
We diagnose valve body issues with hydraulic pressure testing and code reading — not guessing. Written estimate before any work. 2450 N Lincoln Ave.
