DACCO-rebuilt Allison AT540 transmission oil pump assembly — the 8-bolt pump, completely remanufactured and ready to bolt on.
Fresh rebuild: new pump gears, re-machined faces, clean bores. Box was factory-sealed until opened for photos — this pump has never been installed.
Fits: Allison AT540, AT542, AT545 automatic transmissions — the classic 4-speed medium-duty units found in school buses, box trucks, motorhomes, delivery vans, and work trucks. Verify against your old pump — this is the 8-bolt pattern.
Why a rebuilt pump: the pump is the heart of the transmission — low line pressure burns clutches. A reman pump with fresh gears and tight clearances restores full pressure without the price of new.
Quantity: 1 — single unit in the box.
Tag OO-002 — Bin 7.
This unit\'s identifying marks: casting marks 919 and 2430 on the pump body; DACCO box marked 11912.
