Ford F-250 Super Duty Transmission Repair Chicago
Expert Ford F-250 Super Duty transmission service in Chicago. Free computer diagnostic, lifetime warranty on rebuilds, all years.
Expert Ford F-250 Super Duty transmission service in Chicago. Free computer diagnostic, lifetime warranty on rebuilds, all years.
1999–2003: 4R100 4-speed automatic (7.3L Power Stroke diesel and gas V8/V10) 2003–2010: 5R110W TorqShift 5-speed automatic — diesel and gas 2011–2016: 6R140 TorqShift 6-speed — introduced with 6.7L Power Stroke 2017+: 6R140 SelectShift continued with revised torque management
F-250 diesel transmissions experience far more stress than F-150. If you're towing regularly at or near GCWR, a rebuild with upgraded clutches and billet-style pump components is the right solution — not a targeted repair. For the 6R140, a fluid service and torque converter inspection first; full rebuild if TCC contamination has reached the valve body.
5R110W: Motorcraft XT-10-QLVC Mercon SP — critical to use correct spec 6R140: Motorcraft Mercon LV — change every 30,000 miles on trucks that tow
Fluid service: same day. Full rebuild: 4–5 business days (heavy-duty units take longer to source some parts).
"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."
Likely yes — the 6R140 TCC is vulnerable to failure under sustained tow loads. Get a diagnostic immediately; towing on a slipping transmission causes rapid internal damage.
On a high-torque diesel truck, partial repairs rarely hold. The 5R110W sees so much stress that if one clutch pack has failed, others are close. A full rebuild with upgraded friction material is the right call.
If it's shifting normally and fluid is clean, continue with fluid service every 30k. If you're about to increase tow use or add a diesel tune, a preemptive rebuild with upgraded clutches makes sense.
Yes. The 4R100 is a durable unit when rebuilt correctly — we use Raybestos clutches and a new OD servo for all 4R100 rebuilds.
Yes — we source billet converter upgrades for the 5R110W and 6R140 for trucks that tow commercially. Worth the investment for heavy-duty applications.
Same-day appointments available. Honest estimates, no surprises. We've been doing this since 1987.
