Expert Toyota Sienna 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.
2004 - 2010: 5-speed automatic (U151E) on 3.3L and 3.5L V6. 2011 - 2020: 6-speed automatic (U660E) on 3.5L V6. 2021 - 2024: e-CVT hybrid only (no non-hybrid option from 2021 onward). AWD models: Sienna AWD (2004 - 2020) uses rear-wheel electric coupling.
Sienna carries heavy family loads - third-row passengers, gear, and often trailer hitches - making fluid maintenance critical. The U660E is the same unit as Camry and RAV4, so our rebuild experience is deep. AWD coupling service should be addressed at the same time as transmission work on AWD models.
U660E uses Toyota ATF WS. U151E uses Toyota ATF Type T-IV. Hybrid eCVT uses Toyota Hybrid fluid. Change every 40,000 miles.
U660E solenoid: 1 - 2 days. U660E rebuild: 3 - 4 days. Hybrid eCVT: 3 - 5 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.
Very common on 2011 - 2020 Sienna with U660E. Harsh shifts usually mean solenoid A or B failure - often repairable for $550 - 900 without a full rebuild.
On AWD Sienna, that warning indicates the rear coupling is losing function. Not catastrophic if caught early, but failure leaves you without AWD in Chicago winters. Get a diagnostic.
Every 40,000 miles. Minivans carrying heavy loads benefit from fresh fluid more than lighter vehicles.
Could be - but hybrid Sienna hesitation can also be the power management system transitioning between electric and engine power. A diagnostic will clarify.
3 - 4 business days for U660E. We stock Toyota rebuild kits.
Same-day appointments available. Honest estimates, no surprises. We've been doing this since 1987.
