Fix Your Saturn ION’s Shifting Problems for Good
Is your 2006-2007 Saturn ION giving you transmission headaches? From jarring shifts and getting stuck in gear to a persistent check engine light, a faulty Transmission Control Module (TCM) can make your daily drive a frustrating and unreliable experience. As a technician with over 20 years of hands-on diagnostic experience, I’ve seen how a failing TCM can mimic more severe mechanical issues. This VIN-programmed T42 TCM, part number 24240400, is the definitive, hassle-free solution to restore your vehicle’s performance and peace of mind.
This isn’t just a replacement part; it’s a complete repair solution. We program the module to your vehicle’s specific VIN before it ships, which means it’s ready for a true plug-and-play installation right out of the box. You get to skip the expensive dealership visit for programming, saving you time and hundreds of dollars. This module directly addresses the root cause of many common transmission faults, ensuring smooth, precise gear changes and reliable operation for years to come.
Case Study: A Tricky Diagnosis
I remember a 2007 Saturn ION that came into the shop with an intermittent ‘stuck in 3rd gear’ complaint. The owner had already replaced a shift solenoid with no luck. After connecting my scan tool, I saw a generic P0700 code but no specific solenoid faults. The key was the intermittent nature of the problem—it only happened after 20 minutes of driving. This pointed directly to the 2006-2007 ION TCM failing under heat. We installed one of these pre-programmed modules, and the problem was solved instantly. It’s a classic failure mode for these units, and this part is the correct, lasting fix.
Common Signs of a Failing TCM
- âś” Harsh, erratic, or delayed gear shifting.
- âś” Vehicle enters “limp mode,” often stuck in 2nd or 3rd gear.
- âś” Check Engine Light or Transmission Warning Light is illuminated.
- âś” Diagnostic Trouble Codes (DTCs) are present, such as P0700, P0750, or other solenoid-related codes.
- âś” Complete loss of upshifting or downshifting capabilities.
- âś” Poor fuel economy and a feeling of sluggish performance.
- âś” The transmission seems to slip between gears.
A Straightforward Guide to Installation
For the Saturn ION, this is a job most DIYers can handle in their driveway. No complex procedures or specialized tools are needed. The entire process should take less than 30 minutes.
- Safety First: Disconnect the negative terminal from your car’s battery to prevent any electrical shorts and help reset the vehicle’s computer systems.
- Locate the Module: On your 2006-2007 Saturn ION, the TCM is located in the engine bay, typically mounted behind the driver’s side (LH) strut tower.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. Then, unbolt the module from its mounting bracket.
- Install the New TCM: Mount the new, pre-programmed module in place and securely fasten the bolts. Reconnect the electrical harnesses, ensuring they click into place.
- Final Steps: Reconnect the battery terminal. While the module is plug-and-play, it’s best practice to use a basic OBD2 scan tool to clear any stored fault codes from the system. Start the vehicle and enjoy your smooth-shifting transmission!
Will This Fit My Vehicle?
This T42 TCM is the specified replacement for the 2006-2007 ION TCM and is also compatible with a wide array of other General Motors vehicles. It is a direct interchange for part numbers like 24252114, 24234503, 24239224, and 24240400. If your vehicle is on the list below and exhibiting TCM failure symptoms, this is the part you need.
This part fits these models with these options:
ION 06-07 Transmission; (behind LH strut tower)
COBALT 06-10 Transmission; (LH strut tower)
G5 07-10 Transmission; (LH strut tower)
G6 06-10 Transmission; (LH strut tower)
HHR 06-11 Transmission; (LH engine compartment)
MALIBU 06-10 Transmission; (LH frame rail)
AURA 07-09 Transmission; (LH frame rail front)
VUE 07-10 Transmission; (LH front engine compartment)
And many other GM cars, trucks, and SUVs from 2006-2014.
Frequently Asked Questions
Do I need to do any programming or flashing myself?
No. This module is fully programmed to your vehicle’s VIN before we ship it. It is a 100% plug-and-play solution, saving you a trip to the dealership.
Is this a difficult part to install at home?
Not at all. For the Saturn ION, it’s located in an accessible spot in the engine bay. With basic hand tools, most people can complete the swap in under 30 minutes.
What is a core charge? Do I need to send my old part back?
There is absolutely no core charge or need to return your old, faulty module. You can keep it or dispose of it at your convenience.
Will this fix my specific transmission problem?
This module is designed to correct issues directly caused by a failing TCM, such as erratic shifting, limp mode, and specific communication or solenoid codes (like P0700). It will not fix internal mechanical failures of the transmission itself.