4T45E valve body for 2007-Up, remanufactured and ready to install. Ships fast from the USA.
If your Chevy Malibu, Oldsmobile Alero, Pontiac Grand Am or G6 running a 4T45E is shifting harsh one minute and soft or slipping the next, hesitating into gear, or throwing a shift-quality or pressure-solenoid code, the valve body is the first place to look before spending on anything downstream of it. This is a remanufactured 4T45E valve body built on casting 24233226, GM's 2006-2008 production generation, tested and updated before it ships rather than sold as a cleaned-up worn core.
The 4T45E is electronically controlled, which means the valve body does double duty: it is the hydraulic manifold that takes line pressure from the pump and routes it through a maze of precision bores to apply each clutch and band, and it also carries the pressure and shift solenoids the PCM uses to time every one of those shifts. A worn bore or a tired solenoid produces a complaint that can look like a wiring problem, a mechanical problem, or both, because the computer is still issuing correct commands to hardware that can no longer execute them precisely.
GM ran several valve body revisions across the 4T40E/4T45E's life, and the one that changes how the transmission behaves is the EPC (electronic pressure control) solenoid. Through 2003 the valve body used a large-diameter Delphi EPC; from the 2004-2005 casting onward, including casting 24233226 (the 2006-2008 generation sold here), GM switched to a small-diameter Bosch EPC. The two solenoids mount in the identical bore with the identical connector, so the wrong one goes in without any obvious warning sign - a Delphi EPC in a 2004-or-later transmission produces soft, slipping shifts that may never set a code, and a Bosch EPC in an older unit produces harsh shifts that will not adapt back out over time. This unit is built for the correct small-Bosch generation from the start.
This listing is built on the 2006-2008 casting and covers the 4T45E through the 2007-and-up production run noted in the title. Because the 4T40E and 4T45E share the same valve body design and the same casting family, matching by transmission code and casting number - not just the vehicle's model year - is what actually confirms the right part. Pull the old valve body and read the stamped number, or send your VIN and we will match it for you. The full 4T40E/4T45E parts collection lists every casting and year variant we stock.
Service the pan, filter and fluid in the same job - Dexron VI ATF - so none of the debris from the old valve body ends up circulating through the new one, and torque the case bolts in GM's sequence. A scan-tool adaptive relearn after the swap is not optional; without it the PCM keeps shifting on the adaptation values it learned around the worn valve body, and a perfectly good replacement will still feel wrong. If the converter clutch has a history of shudder or slow apply/release, add a TCC solenoid to the same order rather than reopening the pan for it later. A shift kit is also worth pairing in if the shift complaint included more than the solenoid-driven symptoms above.
Shudder under light throttle, a flare on one specific shift, or metal showing up in the pan points past the valve body to the clutch packs or planetary gearset. In that case the 4T40E/4T45E master rebuild kit covers the internal wear items a valve body alone will not fix.
| Transmission | 4T45E |
| Year Range | 2007-Up |
| Condition | Remanufactured / updated |
| Shipping | Ships from the USA |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Casting 24233226 is GM's 2006-2008 valve body for the 4T40E/4T45E family, built with the small Bosch EPC solenoid. Confirm by reading the stamped casting number off your old valve body, or send your year, make, model and VIN and we will verify fitment before you order.
The small Bosch EPC (2004-and-later casting) and the large Delphi EPC (through 2003) mount in the same bore with the same connector, so a mismatch is easy to miss. A Delphi EPC on a newer unit causes soft, slipping shifts with no guaranteed code; a Bosch EPC on an older unit causes harsh shifts that won't adapt out.
They share the same casting family and this same casting, 24233226, covers both the 4T40E and 4T45E in the 2006-2008 generation. Still confirm your exact transmission code before ordering since not every year and application lines up the same way.
Dexron VI.
Yes. Run the adaptive relearn with a scan tool once the valve body is installed, or the PCM keeps using the shift adaptation it learned from the old, worn unit.
That usually points to the torque converter clutch solenoid or to clutch pack and gearset wear rather than the valve body. Check the TCC solenoid first, and consider a master rebuild kit if there's also metal in the pan.
