The SRX is two different vehicles under one name and the transmissions have nothing in common. The 2004–2009 car is a rear-drive Sigma-platform wagon with a longitudinal 5L40E or, on the V8, a 6L80. The 2010–2016 car is a front-drive crossover with a transverse 6T70. A unit from one will not physically mount in the other, so establishing the generation is the whole first step.
Cadillac SRX Used Transmissions — transmission options by generation
| Years |
Transmission |
Type |
Notes |
| 2004–2009 (Sigma) |
5L40E |
5-speed auto |
Longitudinal, behind the 3.6 V6 |
| 2007–2009 (Sigma) |
6L80 |
6-speed auto |
Behind the 4.6 Northstar V8 |
| 2010–2016 (Theta Premium) |
6T70 |
6-speed auto |
Transverse, front-wheel drive |
| 2010–2016 (Theta Premium) |
6T70 AWD |
6-speed auto |
Different output and transfer unit |
| 2010–2011 (Theta Premium) |
6T70 |
6-speed auto |
Behind the 2.8 turbo and the 3.0 V6 |
| 2012–2016 (Theta Premium) |
6T70 / 6T75 |
6-speed auto |
Behind the 3.6 LFX — ratio codes vary |
How to pick the right one
Generation first and it is not a close call: 2004–2009 is rear-drive with a longitudinal transmission, 2010–2016 is front-drive with a transverse one. Then, on the later car, front-wheel drive or all-wheel drive, because the all-wheel-drive 6T70 carries a different output and transfer unit. The final drive ratio appears in many of our listings as an RPO code and is worth matching where you have it. On the earlier car, tell us V6 or V8 — the 5L40E and the 6L80 are different units entirely.
What usually fails on these transmissions
On the 5L40E the common items are the 3-5 reverse clutch and the pressure control solenoid, which shows as lost reverse or a flaring upshift. The 6T70 is the more frequently replaced unit simply because there are more of those cars: the wave plate in the 3-5 reverse clutch assembly can fracture, which takes third, fifth and reverse at once and is the classic 6T70 failure. A shudder or a flare before that is the warning. We pressure test every unit, record the solenoid readings and inspect the fluid before anything is listed.
What ships with every unit
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Pressure tested with the solenoid readings recorded, and the fluid condition inspected and reported.
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Fitment matched — send us the model year, engine, drivetrain and the RPO option code or ID tag and we confirm the part before the order ships.
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Written warranty on every transmission, with labour coverage available.
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Free freight anywhere in the lower 48, crated on a pallet to a commercial address or a terminal.
Replacing the engine at the same time: see our Cadillac used engines. Full terms are in the transmission warranty policy, and the complete catalogue is at used transmissions.
Cadillac SRX used transmissions - frequently asked questions
Which transmissions did the Cadillac SRX use?
Across 2004 to 2016 the Cadillac SRX was built with 5L40E, 6L80, 6T70, 6T70 AWD and 6T70 / 6T75. The table above lists which one belongs to each generation, with the transmission designation and option code that identifies it.
How do I identify the right transmission for my Cadillac SRX?
Four things decide it: model year, engine, drivetrain, and the option or RPO code. That code is the one most people do not have to hand and the one that settles it - on a GM vehicle it is on the glovebox or door-jamb sticker, on a Chrysler it is on the build sheet, and on a Ford it is on a tag on the case. Send us the VIN and the code and we confirm the unit before anything ships.
Will a transmission from a different year fit my Cadillac SRX?
Generation first and it is not a close call: 2004–2009 is rear-drive with a longitudinal transmission, 2010–2016 is front-drive with a transverse one. Then, on the later car, front-wheel drive or all-wheel drive, because the all-wheel-drive 6T70 carries a different output and transfer unit.
What usually fails on these transmissions?
On the 5L40E the common items are the 3-5 reverse clutch and the pressure control solenoid, which shows as lost reverse or a flaring upshift. The 6T70 is the more frequently replaced unit simply because there are more of those cars: the wave plate in the 3-5 reverse clutch assembly can fracture, which takes third, fifth and reverse at once and is the classic 6T70 failure.
What comes with a used Cadillac SRX transmission?
Every transmission is pressure tested with the solenoid readings recorded and the test sheet ships in the box. The unit is matched to your VIN and option code before the order goes out, carries a written warranty with labour coverage available, and freight is free anywhere in the lower 48.
