Transmission History by Year - Cadillac CT5
2020+: 8L45 8-speed automatic (2.0T 4-cyl and 3.0T V6) or 10L80 10-speed (CT5-V with 3.0T) 2022+ CT5-V Blackwing: Tremec TR8060 6-speed manual or 10L80
Expert Cadillac CT5 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.
2020+: 8L45 8-speed automatic (2.0T 4-cyl and 3.0T V6) or 10L80 10-speed (CT5-V with 3.0T) 2022+ CT5-V Blackwing: Tremec TR8060 6-speed manual or 10L80
8L45 pump failure: replacement pump + valve body inspection - catches before complete failure if you act on whine or pressure codes. 10L80: valve body kit. TR8060: synchro rebuild.
8L45/10L80: Dexron HP
Verify exact spec on the dipstick label or owner's manual before fill. Recommended change interval: every 60,000 miles for normal driving, 30,000 miles under severe service (towing, stop-and-go, hot climates). Pan service typically takes 6 - 8 quarts; a full fluid exchange takes 10 - 14 quarts depending on cooler-line capacity.
2 - 4 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.
Could be the 8L45 pump cavitation - an early warning of pump failure. Get it diagnosed immediately; pump failure leads to complete loss of drive.
Same family as the Camaro and Silverado 10-speed. Same valve body wear pattern applies.
2 - 4 days.
The TR8060 is very strong. Synchro wear is possible with aggressive track use.
Generally yes, but the pump is the weak point - whine and pressure codes are the warning. Don't ignore them.
Same-day appointments available. Honest estimates, no surprises. We've been doing this since 1987.
