Is Your Saturn ION Shifting Erratically or Stuck in Gear?
If you’re dealing with the frustration of a transmission that won’t shift correctly, you’re not alone. Over my 20+ years in the shop, I’ve seen countless GM vehicles, including the Saturn ION, come in with symptoms that owners fear mean a complete transmission rebuild is necessary. Harsh bangs into gear, getting stuck in limp mode, or a stubborn check engine light can make driving a nightmare. The good news is that the culprit is often not the expensive mechanical parts, but the electronic brain that controls them: the Transmission Control Module (TCM).
This T42 TCM, part number 24235340, is the definitive solution for your 2006-2007 Saturn ION. Unlike a generic part that requires a costly trip to the dealership for programming, this module arrives at your door pre-programmed to your vehicle’s specific VIN. This ensures it communicates perfectly with your car’s powertrain, restoring the smooth, predictable shifting you expect, right out of the box.
From the Shop Floor: “A customer’s 2007 Saturn ION came in last week with these exact symptoms—it wouldn’t shift past 2nd gear and had a P0700 code. They were quoted over $2,500 for transmission work elsewhere. We scanned it and suspected the TCM. After installing one of our pre-programmed modules, the car shifted perfectly on the test drive. The total repair took less than an hour and saved them a fortune. It’s often the electronics, not the heavy hardware, that fail first.”
Symptoms of a Failing 2006-2007 ION Transmission Control Module
A faulty TCM can manifest in several ways. If you’re experiencing any of the following, this module is the likely fix:
- âś” Harsh, delayed, or unpredictable gear shifts.
- âś” Vehicle is stuck in a single gear (limp mode).
- âś” Check Engine Light or Transmission Warning Light is on.
- âś” Diagnostic Trouble Codes (DTCs) such as P0700, P0750, or other solenoid-related faults.
- âś” Complete loss of shifting capability or intermittent communication failure.
- âś” Decreased fuel economy due to inefficient shifting.
Plug-and-Play Installation: No Dealer Visit Required
You can perform this repair yourself in under 30 minutes with basic hand tools. For the 2006-2007 Saturn ION, the TCM is located in the engine compartment, tucked behind the driver’s side (LH) strut tower.
- Safety First: Disconnect the negative terminal from your car’s battery to prevent electrical shorts and help reset the vehicle’s computer systems.
- Locate the TCM: Find the module behind the LH strut tower. It will have several large electrical connectors attached.
- Disconnect and Remove: Carefully unclip the wiring harnesses. Then, unbolt the module from its mounting bracket and remove the old unit.
- Install the New Module: Bolt the new, pre-programmed TCM into place. Securely reconnect the wiring 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.
Guaranteed Compatibility and Reliability
This module is built to meet or exceed original equipment standards for a long service life. We stand behind our programming and product quality with a one-year warranty. It is a direct replacement for a wide range of GM part numbers, ensuring a perfect fit for your vehicle.
- Part Number: 24235340
- Interchangeable Part Numbers: 24252114, 24234503, 24230461, 24234274, 24235754, 24238856, 24239224, 24239926, 24240400, 24241806, 24243901, 24243921, 24255280, 24256960, 24235732, 24235753, 24240449, YNXS
- No Core Charge: You don’t need to send your old part back.
Don’t let a faulty TCM keep your Saturn ION off the road. Order your VIN-programmed module today and restore your car’s performance and drivability with confidence.