Restore Peak Performance to Your SAAB 9-7X Transmission
If your 2006-2009 Saab 9-7X is suffering from erratic shifting, getting stuck in gear, or throwing transmission-related trouble codes, the culprit is very likely a failing Transmission Control Module (TCM). As the electronic brain of your automatic transmission, a faulty TCM can cripple your vehicle’s performance and reliability. This T42 TCM, part number 24235754, is the definitive, hassle-free solution. We pre-program it to your vehicle’s specific VIN, ensuring it arrives ready for a direct, plug-and-play installation without any expensive trips to the dealership for programming.
From the Diagnostic Bay: The Telltale Signs of TCM Failure
Just last week, a customer brought in a 2008 Saab 9-7X with a classic complaint: the SUV would shift hard from 1st to 2nd gear when cold, and occasionally it would refuse to shift past 3rd gear on the highway, forcing him to pull over and restart the vehicle. A quick scan revealed a P0700 (Transmission Control System Malfunction) and a solenoid performance code. In my 20+ years of diagnostics, this pattern almost always points directly to an internal failure in the TCM. Instead of a costly transmission rebuild, we installed one of our VIN-programmed T42 modules. The entire job took less than 30 minutes, and the Saab was shifting as smoothly as the day it left the factory. This is the most common and effective repair for these symptoms.
Is Your Saab 9-7X Showing These Transmission Red Flags?
A failing TCM will give you clear warning signs. If you’re experiencing any of the following, it’s time to consider a replacement to avoid further damage to your transmission’s mechanical components.
- ✔ Harsh, jerky, or delayed gear shifts that disrupt your drive.
- ✔ Vehicle enters “limp mode,” often getting stuck in 2nd or 3rd gear as a safety measure.
- ✔ The Check Engine Light or a dedicated transmission warning light is illuminated on your dash.
- ✔ Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, P0753, P0758, or other solenoid-related faults.
- ✔ A noticeable decrease in fuel economy as the transmission operates inefficiently.
- ✔ Complete loss of communication with the module, leading to a no-shift or no-start condition.
Your Straightforward 30-Minute Installation Guide
One of the best features of this module is its simple, DIY-friendly installation. You don’t need a vehicle lift or specialized tools. For the Saab 9-7X, the TCM is conveniently located in the engine bay.
- Safety First: Before you begin, disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts and help reset the system.
- Locate the Module: On the 2006-2009 Saab 9-7X, the TCM is found in the left-hand (driver’s side) engine compartment. It’s a silver box with electrical connectors.
- Disconnect and Remove: Carefully unplug the wiring harness connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt the old module from its mounting bracket.
- Install the New Module: Bolt your new, pre-programmed TCM into place. Securely reconnect the wiring harnesses, ensuring they click into place.
- Final Steps: Reconnect the negative battery terminal. Start the vehicle and allow it to idle for a few minutes. While not always necessary, using a basic OBD2 scan tool to clear any stored fault codes is a good final step.
Verified Fitment Beyond Your Saab 9-7X
This T42 Transmission Control Module is an OEM-quality component for a wide array of General Motors vehicles equipped with 4-speed automatic transmissions like the 4L60E, 4L65E, and 4L70E. While this page is dedicated to the 2006-2009 SAAB 9-7X Transmission Module, it also serves as a direct replacement for many other popular models. Please verify your vehicle in the fitment list below.
This part is interchangeable with service numbers: 24242391, 24234503, 24252114, 24230461, 24234274, 24235340, 24238856, 24239224, 24239926, and more.
Frequently Asked Questions
Frequently Asked Questions
What exactly is VIN programming?
VIN programming means we load your vehicle’s unique 17-digit Vehicle Identification Number (VIN) and the latest GM software onto the module before we ship it. This ensures the TCM works perfectly with your Saab’s specific engine, transmission, and options, eliminating the need for dealer calibration.
Will this fix my specific error code, like P0700?
Yes. This module is designed to resolve issues causing common transmission codes like P0700, P0750-series solenoid codes, and communication errors. A new, functioning TCM is the direct remedy for these electronic faults.
Is this a difficult part for a DIY mechanic to install?
Not at all. The installation is very straightforward. Because the module is located in the engine bay and not inside the transmission, it only requires basic hand tools and can typically be swapped in under 30 minutes.
Do I need to return my old TCM? Is there a core charge?
No. We do not require you to send back your old part, and there is no core charge. You can dispose of your old module without any hassle.
How do I provide my VIN for programming?
You will be prompted to enter your vehicle’s VIN during the checkout process. Please double-check it for accuracy to ensure proper programming.