Collection: Used Cadillac Transmissions For Sale

Browse Cadillac Transmissions by Year

Year-specific pages coming online weekly — text us your VIN and we will match you to the right Cadillac transmission from our verified inventory today.

Cadillac Transmissions We Cover

Real transmissions from our warehouse, VIN-matched and ready to ship. Cadillac spans GM's entire range: shared body-on-frame truck automatics (Escalade is mechanically a Tahoe or Suburban), bespoke luxury units like the Northstar-dedicated 4T80-E, and V-Series performance hardware — the 10L90, the Tremec TR-6060, and the ZF 8HP70 that ran in Gen 2 CTS-V before GM rolled out its own 8L90.

GM 8L90 8-Speed Automatic

CTS, CT6, Escalade (2014+), Camaro and Corvette crossfit. The dominant modern Cadillac automatic. Highest demand.

GM 10L90 10-Speed Automatic

CT6, CT5-V Blackwing, Escalade-V, Camaro ZL1 crossfit. Heavy-duty 10-speed for the high-output V-Series.

GM 6L80 / 6L80E 6-Speed Automatic

Older CTS, Escalade, STS (2007–2014), Silverado and Tahoe crossfit. The Hydra-Matic 6-speed before the 8L90.

GM 4L60-E / 4L65-E 4-Speed Automatic

Classic Escalade (2002–2009), CTS, SRX. The bulletproof GM 4-speed of the 1990s and 2000s — 4L65-E is uprated.

GM 6T70 / 6T75 6-Speed Transaxle

SRX, XTS, older FWD CTS. Transverse FWD/AWD 6-speed transaxle — different architecture from the longitudinal 6L80.

GM 9T50 9-Speed Transaxle

XT4, XT5, XT6 (2017+). Modern transverse 9-speed for the crossover line — TCM revision matters on a swap.

GM 4T80-E 4-Speed Transaxle (Northstar)

DeVille, DTS, Seville, STS, Eldorado (1993–2010). Built specifically for the Northstar V8 — will not cross-shop with any 6T-series.

ZF 8HP70 8-Speed Automatic (Pre-8L90)

CTS-V Gen 2, select applications (2009–2015). Longitudinal RWD 8-speed — ZF-built, pre-dating the in-house 8L90.

Tremec TR-6060 6-Speed Manual

CTS-V manual, Camaro SS and Corvette crossfit. The supercharged-V8 performance manual — different torque class from the AY6.

Aisin AY6 6-Speed Manual (ATS)

ATS manual, Camaro V6 manual crossfit. Compact Aisin manual for sport-sedan V6 applications.

GM 4L80-E 4-Speed Heavy-Duty

Escalade tow-package applications, Silverado HD and Suburban crossfit. Heavy-duty 4-speed truck auto.

More Cadillac Transmissions

Plus 4T65-E HD, 10L80 variants, Escalade AWD transfer cases, classic TH-400 and 4T60-E builds, and special-order requests — text us your VIN.

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Why Buy a Used Cadillac Transmission from Auto Power Source

Cadillac covers more mechanical ground than any other GM brand. At one end sit shared body-on-frame truck automatics — the 4L60-E, 4L80-E, 6L80, and 8L90 that make an Escalade mechanically a Tahoe or Suburban. At the other end sits genuinely bespoke hardware: the 4T80-E was engineered specifically around the Northstar V8 for DeVille, DTS, Seville, and Eldorado, and the V-Series line runs the 10L90, the Tremec TR-6060, and — in Gen 2 CTS-V — a ZF 8HP70 sourced before GM had its own 8-speed. In between are the transverse transaxles (6T70, 6T75, 9T50) for SRX, XTS, and the XT line.

Every Cadillac transmission we sell has been pulled from a low-mileage donor, cataloged by VIN, and held in our climate-controlled warehouse. Each unit goes through our six-step inspection: VIN-matching, ASE Shift-Testing through every gear under load, noise verification, full visual inspection of case, pan, and bellhousing, multi-angle photography, and palletized freight shipping. The 9T50 gets TCM calibration-revision verification, and TR-6060 units get gearset and synchro inspection under load. Rejected units never reach the buyer.

You pay a fraction of dealer-new pricing for the same GM engineering, ship free on a heavy-duty pallet anywhere in the continental U.S., and you have 30 days from delivery to return for any reason — no restocking fees. Up to a 3-year warranty covers you if anything goes wrong after install, and our six-step inspection has held our fitment-related return rate at 0% across 100,000+ shipments.

Your Cadillac Transmission Options: Compared

Most Cadillac owners face four real choices when their transmission fails:

Tested used OEM hits the sweet spot — same engineering as new, fraction of the cost.

Cadillac Transmission Buying Guide

Cadillac shares much of its catalog with the rest of GM but also carries units built for it alone, so matching runs on RPO code, drivetrain architecture, and output level. Five things to verify before buying a used Cadillac transmission:

1. Match on the RPO code, not the badge or the trim. The RPO (Regular Production Option) code identifies the exact unit GM built into your car. An Escalade and a Silverado of the same year can carry the same transmission, while two CTS of the same year can carry different ones depending on engine and trim. Send us the RPO or the VIN.
2. 8L90 vs 10L90 vs ZF 8HP70 — three different multi-speed autos, not one family. The 8L90 is the volume GM 8-speed from 2014. The 10L90 is the high-output 10-speed for CT5-V Blackwing, Escalade-V, and CT6. Gen 2 CTS-V (2009–2015) used a ZF 8HP70 in select applications, which is a ZF unit and not GM hardware at all. Different converters, valve bodies, and control calibration — never cross-shop on model year.
3. The 4T80-E is the Northstar transaxle and swaps with nothing else. Built specifically around the Northstar V8 for DeVille, DTS, Seville, STS, and Eldorado. It shares no case, bellhousing, or final drive with the 4T65-E or any 6T-series transaxle. If your car has a Northstar, this is the unit — confirm before ordering anything else.
4. Longitudinal RWD and transverse transaxles never cross-fit. Escalade, CTS, CT5, CT6, and ATS run longitudinal units (8L90, 10L90, 6L80, 4L60-E, 4L80-E). SRX, XTS, XT4, XT5, and XT6 run transverse transaxles (6T70, 6T75, 9T50) with the differential integrated into the case. Match by chassis architecture, not by model year overlap.
5. V-Series manuals: TR-6060 and AY6 are different torque classes. The Tremec TR-6060 sits behind the supercharged CTS-V V8; the Aisin AY6 sits behind the ATS V6. They are not alternatives to each other. If you are replacing a CTS-V manual, only a TR-6060 rated for that output will do the job.

Our ASE-certified technicians verify every one of these points against your VIN before any transmission ships.

Learn More: Cadillac Transmission Guides

Practical guides from our team — how to install a used Cadillac transmission, what to check on delivery, and what really matters when buying online.

APS Preinstallation Guide

Step-by-step guide to properly installing a used transmission — what to inspect, prep, and torque before first start.

Post-Install Maintenance Checklist

Keep your used transmission running like new — the break-in period, fluid intervals, and warning signs to watch for.

5 Things to Know Before Buying

Warranty terms, VIN matching, mileage, testing, return policy — the checklist every buyer should run through.

After Delivery: Inspection Guide

What to check the moment your transmission arrives — freight damage, matching numbers, and what to photograph.

Frequently Asked Questions

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