Allison valve body for 2000, remanufactured, OEM and ready to install. Ships fast from the USA.
Medium-duty trucks running the 2006-2009 Allison 2000 - GM Kodiak and TopKick cab-and-chassis trucks with the Duramax diesel, plus other chassis built on the same drivetrain - lean on this transmission hard under constant load, and the valve body is the part that wears fastest. If yours is shifting harsh, slipping between gears, flaring on a shift, or has thrown a limp-mode code, this remanufactured 7-solenoid, 2-tube, OEM AL-2512 valve body is the correct fix for that year range, bench-tested with the correct updates before it ships.
Allison built the 1000, 2000, and 2400 Series on the same control platform - Sonnax's identification guide for this family covers all three together because they use the same valve body castings and solenoid architecture, scaled for different load ratings. The 2000 Series is the step up from the 1000, built for the heavier chassis and commercial-duty cycles these medium-duty trucks see. The valve body itself is the hydraulic brain of the unit: it routes line pressure through precision bores and spool valves to apply each clutch and band, and the 7 solenoids on this casting are what the TCM fires to time every shift under that load.
Scan for codes and note which specific shift is affected before you spend anything - Sonnax ties specific stuck or worn valves to specific codes (a sticking E-shift valve to P0872 and a failsafe condition, F-trim sleeve wear to P0741), so the code you pull narrows down whether this is a valve body problem or something else. Our Allison valve body problems and testing guide covers the hydraulic checks that apply across the 1000/2000 family, and our limp mode guide lists the other failure points to rule out first.
This unit is built for the 2006-2009 Allison 2000 - the 7-solenoid, 2-tube, OEM AL-2512 casting generation also used on the 1000 Series in this same year range. If your chassis is older or newer than this window, the casting is different; match the tube count and solenoid connector pattern against the listing photos, or send us the year and chassis and we will confirm. The full Allison transmission parts collection covers the rest of what we stock across the 1000 and 2000 Series, including shift selectors and cooler line kits for these commercial chassis.
Drop the pan and filter at the same time as the valve body swap on these high-mileage commercial units - debris from a worn valve body circulates through the whole hydraulic circuit, and running it into a new unit will shorten its life. Torque the valve body bolts in sequence to spec, and refill with TES 668 full synthetic ATF, which is Allison's current recommended fluid across the 1000, 2000, 3000, and 4000 Series and backward compatible with the TES 295 and TES 389 these trucks shipped with; a 1-gallon Castrol TranSynd 668 lets you top off between full services. If the truck uses a push-button shift selector, check it for intermittent faults while you have the dash apart, since a worn selector on these chassis can mimic a transmission shift complaint. Clear codes and run the adaptive relearn after the swap so the TCM re-times clutch fill against the new unit.
| Transmission | Allison |
| Year Range | 2000 |
| Condition | Remanufactured / updated |
| Shipping | Ships from the USA |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Yes, for this year range - Allison built the 1000, 2000, and 2400 Series on the same control platform, and the 2006-2009 7-solenoid, 2-tube, OEM AL-2512 casting is shared across them.
Medium-duty, commercial-duty chassis such as the GM Kodiak and TopKick cab-and-chassis trucks with the Duramax diesel, built one step up from the 1000 Series for heavier loads.
Harsh or flared shifts (often worse under a loaded box or trailer), slipping between gears, torque converter clutch shudder while pulling, and limp mode with a solenoid, pressure, or ratio code.
TES 668 full synthetic ATF, Allison's current recommended fluid across the 1000, 2000, 3000, and 4000 Series, backward compatible with the TES 295 and TES 389 these trucks originally used.
Not as-is - Allison changed the casting across different year windows on this platform, so send us your year and chassis and we will confirm the correct version before you order.
Yes - clear codes and run the TCM's adaptive relearn so clutch fill and shift pressure are retimed against the new valve body instead of the worn one it had adapted to.
