4T40E Valve Body 2006-2010, new other (see details) and ready to install. Fits the 4T40E. Ships fast from the USA.
A 2006-2010 Chevrolet Cobalt, HHR, Pontiac G5 or Saturn Ion that shifts harshly, flares between gears, or runs hot and smells burnt is describing the two failure patterns that define the GM 4T40E and its heavier-duty sibling the 4T45E. This valve body is built for the 2006-2010 production window, so once you have confirmed the hydraulic circuit rather than a sensor or wiring fault is the cause, you install a correct-fit replacement instead of reworking a worn bore by hand.
The 4T40E is a 4-speed, electronically controlled front-wheel-drive transaxle, and the valve body is where every shift actually happens - it routes line pressure through its bores and spool valves to the clutch packs and bands, while carrying the shift and pressure-control solenoids the PCM commands to time each gear change. Once a bore wears or a solenoid circuit drifts out of range, the transaxle cannot regulate pressure correctly no matter what the computer tells it to do.
Pressure-regulator bore wear is the single biggest driver of problems on this transmission - aftermarket valve-body rebuild kits for the 4T40E note that almost everything that goes wrong with it traces back to excessive wear in the PR valve bore, which is what produces the overheating, burnt-clutch and P0741/P0742/1887 pattern above. That is a different root cause than the harsh-engagement complaint tied to intake-air-temperature circuit codes P0112, P0113, P1111 or P1112, which points toward a wiring or sensor-ground problem rather than the valve body itself - so pull your codes first and road-test before ordering, since the fix is not the same part either way.
This valve body is built for the 4T40E as installed in GM's compact front-wheel-drive lineup through the 2006-2010 model years, including the Chevrolet Cobalt, HHR and Pontiac G5, and it shares its basic design with the related 4T45E used in the Malibu, Grand Am, Alero and Saturn Ion. GM has run at least three different accumulator spring designs on this transaxle since it launched in 1995, so match your casting marks and connector count against the old unit, or send your year and VIN so we can confirm before you order. The 4T40E/4T45E parts collection has the rest of what we stock for this transaxle.
Drop the pan and change the filter at the same time as the valve body so debris from the old unit does not circulate into the new one, torque the bolts in sequence to spec rather than corner to corner, and refill with Dexron VI ATF. Clear codes and road-test after installation to confirm the new unit cleared the pressure or solenoid fault rather than just moving it. If your original complaint was a single stored solenoid code rather than a broad shift-quality problem, our pressure control solenoid or full solenoid kit may be the cheaper fix, and if the transaxle has enough mileage to warrant a fuller rebuild, our master rebuild kit covers the rest of the wear items in the same job.
| Fits | 4T40E 2006-2010 |
| Part type | Valve Body |
| Condition | New Other (See Details) |
| Brand | Sonnax |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Harsh engagement or upshift codes P0112, P0113, P1111 or P1112, pressure-regulator wear codes P0741, P0742 or 1887, and pressure-control solenoid fault codes.
Excessive wear in the pressure-regulator (PR) valve bore. Aftermarket rebuild kits for this transmission note that almost everything that goes wrong with it - overheating, burnt clutches, planet gear damage - traces back to that one bore.
No - codes P0112, P0113, P1111 and P1112 point to the intake-air-temperature circuit, usually a wiring or sensor-ground issue, while P0741, P0742 and 1887 point to the pressure-regulator bore. Pull your codes before ordering so you replace the right part.
It is built for the 2006-2010 production years. GM ran at least three different accumulator spring designs on this transaxle since 1995, so match your casting marks and connector count or send your year and VIN to confirm.
It is a closely related, heavier-duty version sharing the same basic valve body design, used in the Malibu, Grand Am, Alero and related models.
Dexron VI ATF.
