Founded in 1915, Allison’s years of experience in the transmission industry makes them the partner you can always rely on, just as you can rely on their products to provide years of service. Visit their homepage here.
Allison Transmission, is the world leader in designing, manufacturing and marketing fully automatic transmissions for commercial applications. Allison has a comprehensive transmission portfolio to cover the diverse vocations and chassis types and sizes of commercial vehicles worldwide.
Transmission Model Lookup for Allison Transmission
Brings superior performance of electronic controls from 6 to 15 tonne vehicle GVW. The engine and transmission communicate by a powerful microprocessor providing precise, perfectly timed shifts whatever the road or load conditions. Standard features include lock-up operation in second to fifth range and helical gearing for reduced transmission noise.
The 2000 Series transmission is designed for commercial trucks and smaller buses with gross weights up to 15,000 kilos (33,000lbs). The transmission increases torque capacity for higher powered vehicles within a lighter weight package. Adaptive technology ensures that optimum performance is maintained at all times. It also enables the transmission to compensate for variations in driving conditions, such as loads, drivers and traffic patterns. Standard features include the availability of close and wide ratio gearing and a turbine-driven PTO provision with optional neutral lock-up.
Is flexible enough to work in a wide variety of vehicles, designed with a choice of close ratio for city streets and highway driving and wide ratio for construction and refuse applications. The torque converter results in better startability, particularly on gradients and an optional output retarder provides effective auxiliary and vehicle braking.
With high horsepower and torque ratings making heavy duty commercial vehicles more productive and easier to drive. With Allison electronic controls a 4000 Series can adapt to operate efficiently in a wide variety of conditions for superior performance in severe applications. Programming options can be set to prevent gear engagement whilst the auxiliary equipment is in operation.
An ideal choice for city buses and coaches, advanced electronic controls ensures efficient operation in all kinds of terrain and inner city traffic. The torque converter operation and close ratio gears optimise engine efficiency. The early lock-up engagement with “closed loop” adaptive controls ensures outstanding shift quality.
The 5000, 6000, 8000, and 9000 Off-Highway Series transmissions are used in applications requiring 298 kW to 1678 kW (400 to 2250 horsepower) engines. Applications are diverse and include oil-field pumping and fracturing units, off-highway trucks, agricultural tractors, and winch units such as those on derricks and cranes.
5000, 6000, 8000, 9000 Series transmissions have a torque converter and lockup clutch, planetary gear sets, and hydraulic clutches. Further needs are met by optional equipment which may include a hydraulic retarder, parking brake, power takeoff (at various locations), or transfer gear housing (dropbox).
Hydraulic or electronic controls are available on the 5000 and 6000 Series. The 8000 and 9000 Series transmissions utilize manual or automatic electronic controls.
Allison Transmission Service – General Questions
Q: What maintenance procedures should on-/off-highway truck operators follow to ensure a transmission does not fail prematurely? Is it a combination of operating techniques and simple maintenance procedures, or other criteria?
A:The World Transmission electronic control system is programmed to inform the operator of a problem with the transmission system and automatically take action to protect the operator, vehicle, and transmission. When the Electronic Control Unit (ECU) detects a problem condition, the ECU restricts shifting, turns on the CHECK TRANS light on the instrument panel, and registers a diagnostic code.
Diagnostic codes are numerical indications relating to a malfunction in transmission operation. Each code consists of a two-digit main code and a two-digit subcode. These codes are logged in a list in the ECU memory with the most severe or otherwise most recent code listed first. A maximum of five codes (numbered d1-d5) may be listed in memory at one time. Diagnostic codes are accessed through the pushbutton and lever shift selectors or the diagnostic data reader. The procedure to retrieve diagnostic codes is listed in the transmission operator’s manual. A maintenance technician will use these codes to determine the source of any potential malfunction and to formulate a suitable repair plan.
A:As in any industrial or commercial setting it is always unwise to allow untrained individuals to perform any kind of work on complicated equipment. In the case of transmission repairs, improper work practices could result in costly rework efforts, excessive vehicle downtime, and diminished customer satisfaction. For example, over-torquing filter cover bolts may result in stripped bolt hole threads, which would require a transmission removal for main case replacement. Improper testing of an electronic control unit may result in damage to the internal circuits requiring its replacement.
Fortunately for the fleet owner or end-user, Allison Transmission has a worldwide network of authorized distributors and dealers trained and equipped to perform a full range of maintenance and repair procedures. Fleet maintenance personnel may also attend training at an authorized distributor or at Allison Transmission’s main manufacturing facility training center.
A:Solid particulate contamination may have a detrimental effect on the durability of bushings and roller bearing elements inside the transmission. Additionally, fine particulates may degrade the functionality of components in the control module by causing solenoid valves to fail or clutch apply valves to stick.
The presence of water and/or ethylene glycol coolant mixtures in the transmission oil is detrimental to the reliabilty and durability of the internal components. This foreign liquid has a deteriorating effect on non-metallic components (rubber, gasket material, etc.) and on highly loaded steel parts, such as bearings and gears, due to reduced lubricity. Frictional capacity of drive clutch plates can be greatly reduced, as a result of surface film or impregnation and the presence of glycol will physically deteriorate clutch plate material.
- Fluid recommendations for each transmission model
- Cold weather vs. fluid viscosity
- Used oil analysis for improved fluid performance
- Type of vehicle – motorhome, dump truck, etc.
- HP of your engine
- Description of your shift selector
- Age of your vehicle
- Serial number of the transmission – if possible (check nameplate on the side of the transmission).
A:Take your vehicle to an authorized Allison Distributor or Dealer. These Allison Facilities may offer full service or provide only simple maintenance on easily accessible components.
Allison Transmission Vision
Be the world leader in commercial-duty transmissions, hybrid-propulsion systems, and related parts and services for on-highway vehicles, military vehicles, and off-highway equipment. We will earn our Customers’ enthusiasm through continuous improvement driven by the integrity, teamwork, and innovation of Allison people.
Allison Transmission Brand Promise
The Allison Brand Promise is the automatic experience with an unrivaled combination of Quality, reliability, durability, vocational value and Customer service.