Transmission History by Year - Cadillac CTS
2008 - 2014: 6L50 6-speed automatic (3.0L/3.6L V6) or 6L80 (3.6L AWD) 2014 - 2019: 8L45 8-speed automatic (2.0T or 3.6L) or ZF 8HP70 (CTS-V, 6.2L) 2019+ (CT5 successor): see CT5
Expert Cadillac CTS 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.
2008 - 2014: 6L50 6-speed automatic (3.0L/3.6L V6) or 6L80 (3.6L AWD) 2014 - 2019: 8L45 8-speed automatic (2.0T or 3.6L) or ZF 8HP70 (CTS-V, 6.2L) 2019+ (CT5 successor): see CT5
6L50/6L80: SRV sleeve repair. 8L45: pump replacement + rebuild. ZF 8HP70: valve body or rebuild. CTS-V applications need more aggressive fluid service intervals due to performance use.
6L50/6L80: Dexron VI 8L45: Dexron HP ZF 8HP: ZF Lifeguard 8
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.
On 2008 - 2014 CTS with 6L50/6L80, SRV bore wear. On 2014+ with 8L45, pump wear or TCC. Diagnostic first.
More aggressive fluid changes - every 20k miles on an 8L45 CTS-V or ZF 8HP in a CTS-V. Don't skip.
Yes - the 8L45 and ZF 8HP70 in CTS-V are regular rebuilds for us.
2 - 4 days depending on which unit.
For a clean CTS, yes. CTS-V especially holds value - the rebuild is a fraction of the car's worth.
Same-day appointments available. Honest estimates, no surprises. We've been doing this since 1987.
