This is the drop box for the Volvo A40G articulated hauler, rebuilt by Midwest Industrial Sales under part number 22737. Every unit ships with a heavy-duty differential upgrade addressing the known OEM weak point, an upgraded shift fork, 100% new wear parts, and a 2-year warranty. Depending on serial range, some A40G machines use the 22568 instead — call us with your serial and we’ll confirm the right one.
After 20+ years of rebuilding Volvo drop boxes, these are the failure modes that drive most returning units. Every Midwest Industrial Sales rebuild addresses each one as part of the standard process — not just the failure that brought the unit in.
The most common reason an A40G drop box comes in for rebuild. Our heavy-duty differential package addresses the known OEM weak point that drives 20+ years of returning units.
Sensors fail in dusty haul-road environments well before downstream drivability complaints. Often shows up as fault codes the operator ignores until shifting degrades.
A known OEM weak point. High-cycle articulated-truck operation wears the shift fork assembly past spec. Every Midwest Industrial Sales rebuild installs the upgraded shift fork.
Dusty haul-road environments push moisture and grit past the OEM breather plate, degrading gear oil and accelerating bearing wear. We install an improved breather on every rebuild.
Every wear item in the drop box is replaced — not inspected and reinstalled. Bearings, seals, gaskets, and all wear bushings are 100% new on every rebuild.
Every A40G drop box that leaves our Gardner, Illinois facility has been fully torn down to housing castings, cleaned, inspected against factory specs, and reassembled with new wear parts. The heavy-duty differential package addresses the known OEM weak point. The shift fork is replaced with an upgraded assembly. All speed sensors, position sensors, and shift solenoids are new genuine OEM. Bearings, seals, and gaskets are 100% new. The breather plate is upgraded for haul-road contamination control. We do not just rebuild — we reinforce the OEM weak points first.
See the full drop box rebuild standard →Midwest Industrial Sales rebuilds the Volvo A40G drop box under part number 22737. Depending on serial range, the A40G may also use the 22568 drop box — call us with your serial number and we will confirm which one fits your machine.
Pricing depends on the condition of the core, supersession history, and turnaround needs. Call Midwest Industrial Sales at (800) 447-9343 with your serial number and we will confirm pricing and lead time. Most A40G drop box rebuilds ship within days of order — we maintain inventory.
Both serve the Volvo A40G. The 22568 (alternate 22569) also covers the A35E/F/G and A40E/F, while the 22737 is specific to the A40G. The correct one depends on your machine’s serial range — call Midwest Industrial Sales with your serial number and we will confirm.
Every Midwest Industrial Sales drop box rebuild ships with: a heavy-duty differential package addressing the known OEM failure point, an upgraded shift fork assembly, an improved breather plate for haul-road contamination, 100% new bearings, seals, and gaskets, and all-new genuine OEM speed sensors and shift solenoids. We do not just rebuild — we reinforce the OEM weak points first.
Every Volvo drop box rebuilt by Midwest Industrial Sales ships with a 2-year warranty. Coverage and terms are confirmed at the time of quote.
We’ll confirm whether your A40G takes the 22737 or the 22568, check availability, and quote on the spot. We keep A40G drop boxes in stock.