Expert Chevrolet Silverado 2500HD transmission service in Chicago. Diagnosis-first inspection, Written warranty terms on rebuilds, all years.
We will contact you as soon as a service member is available by call, text, or email.
2001 - 2006: Allison 1000 (Duramax diesel) or 4L80E (gas) 2007 - 2010: Allison 1000 6-speed (Duramax) or 6L90 (gas) 2011 - 2019: Allison 1000 6-speed continued; 6L90 for gas 2020+: Allison 10L1000 10-speed (Duramax) or 10L90 (gas)
Allison 1000 TCC failure: converter replacement with valve body inspection. SRV bore wear (Allison or 6L90): Sonnax sleeve repair, cheap if caught early. Full rebuild if valve body bore damage is extensive. Allison 10L1000 is a newer unit - seeing early solenoid issues on 2020+ trucks.
Allison 1000: Allison TES-295 or equivalent - change every 25,000 miles under towing use 6L90: Dexron VI
SRV repair: 1 - 2 days. Allison rebuild: 4 - 6 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 - it's one of the strongest automatic transmissions available. Most problems arise from torque converter and solenoid issues at high mileage, not core unit failures.
Possibly TCC slip or a solenoid issue. Our Diagnostic appointment will pinpoint it. Don't tow heavy loads with a slipping transmission - damage accelerates rapidly.
4 - 6 days. It's a large, complex transmission.
No - gas 2500HDs use the 4L80E or 6L90 depending on year. The Allison is diesel-only.
Yes - our flatbed can handle 2500HD and 3500 trucks. Free within 15 miles with repair over $500.
Appointments scheduled based on availability. Honest estimates, no surprises. We've been doing this Serving Chicago drivers.
