Model / Part Number: Allison 30844
Product Type: Fully Automatic / Hydrodynamic Transmission

Product Overview

The Allison 30844 is a rugged, heavy-duty automatic transmission widely used in demanding industrial, mining, and off-road applications. In its remanufactured form, this unit delivers near-OEM performance and reliability—offering fleets an effective way to restore drivetrain integrity at a lower cost than a brand-new unit.

Our remanufactured Allison 30844 units are rebuilt to strict blueprint specifications, ensuring durability, shift quality, and performance comparable to new OEM units.

Function & Application

• The Allison 30844 serves as the propulsion heart in vehicles requiring smooth torque delivery, multiple speed ranges, and the ability to handle heavy loads.

• It is commonly used in heavy equipment, mining trucks, haul trucks, and other off-highway machinery where reliability under extreme conditions is essential.

• Its design supports torque multiplication (via torque converter) and seamless gear transitions, which helps reduce drivetrain stress and enhance operator comfort.

Remanufacturing Process

1. Complete Disassembly & Inspection

   • The unit is fully dismantled, and each component (housing, gears, shafts, clutches, valve bodies, etc.) is carefully inspected for wear, cracks, or distortion.

2. Cleaning & Preparation

   • Components are cleaned using high-pressure aqueous spray, ultrasonic cleaning, and media blasting (as required) to remove contamination, carbon, and residues.

   • All hydraulic passages, bores, and surfaces are prepared to “near sanitary” cleanliness levels.

3. Component Replacement & Refurbishment

   • All non-serviceable parts are replaced (clutch plates, friction materials, seals, gaskets, O-rings, bearings, bushings).

   • Hard parts (gears, carriers, planetary elements) are reconditioned or replaced based on measurement tolerances.

   • The torque converter is replaced or requalified per Allison specifications.

4. Valve Bodies & Control Systems

   • Valve bodies and solenoids are disassembled, tested, cleaned, and calibrated.

   • Control electronics (if present) are reprogrammed or updated to the latest available calibration.

5. Assembly & Calibration

   • The transmission is assembled using precise torque values, alignment tools, and fixture checks.

   • All clearances and shims are verified to blueprint tolerances.

   • The unit is updated to current Allison engineering changes where applicable.

6. Dynamometer Testing & Quality Assurance

   • Each rebuilt 30844 is dyno tested under load conditions to simulate real-world operation.

   • Tests include shift timing, pressure checks, clutch apply performance, leakage tests, and torque output verification.

   • Test results are documented and provided to the customer.

Key Features & Benefits

• Restores OEM-level performance at a fraction of the cost of new

• 100% replacement of wear items (seals, clutches, gaskets) ensures long service life

• Blueprint tolerances, matched component sets, and calibration preserve shift quality and reliability

• Dynamometer-tested for shift integrity, torque output, and leak-free operation

• Backed by a full warranty (parts & labor) to instill confidence and protect your investment

• Core exchange and logistical support to reduce downtime

Typical Applications

• Off-road haul trucks and mining vehicles

• Heavy construction machinery operating under high torque loads

• Industrial vehicles where automatic transmissions are preferred for operator comfort and reliability

• Retrofitting fleets that require dependable transmission performance in severe environments

Quality & Value Proposition

By applying rigorous remanufacturing methodology, quality control, and OEM standards, our remanufactured Allison 30844 transmissions offer an ideal balance of value and performance. Fleets regain nearly new-level durability and operational confidence without the cost of a new unit. In critical applications where downtime is costly, our reman units deliver reliable, repeatable performance you can bank on.