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General| Number of Forward Gears | 6 |
|---|---|
| Number of Reverse Gears | 1 |
| Transmission Model | 4500 SP |
| Description | The Allison Transmission 4500 SP is a fully automatic transmission designed for medium-duty trucks and buses. |
| Engine Compatibility | Diesel and alternative fuel engines |
| GVW (Gross Vehicle Weight) | Up to 66, 000 lbs |
| PTO Provision | Available |
| Type | Fully automatic transmission |
| Input Voltage | 12/24 VDC |
| Communication Protocol | SAE J1939 |
| Operating Temperature Range | -40°F to 250°F (-40°C to 121°C) |
Defines warning, caution, and note symbols and their importance for safety.
Provides crucial safety warning for starting the engine with service brakes applied.
Defines overheating conditions and actions to take for high fluid temperatures.
Emphasizes proper parking brake use to prevent unexpected vehicle movement.
Details how to select forward and reverse ranges using shift selectors.
Explanation of inhibited shifts indicated by flashing range selections.
Combines performance and economy schedules based on vehicle load.
Automatic limitation of transmission range during oil over-temperature.
Manages engine torque to limit vehicle acceleration rate.
Details software and calibration packages for fuel economy features.
Explains how retarder capacity is reduced due to high temperatures.
Details capacity reduction when retarder temperature exceeds limits.
Explains capacity reduction when transmission sump temperature exceeds limits.
Guidelines for inspecting transmission fluid, connections, and exterior.
Actions to take when encountering issues like shift quality or leaks.
Lists approved fluids meeting Allison specifications TES 295®, TES 668TM, TES 389®.
Using fluid analysis to optimize protection and change intervals.
Methods for checking transmission fluid levels to prevent mechanical failure.
Instructions for checking transmission fluid level with a dipstick.
How to perform a cold fluid check to ensure adequate fluid for startup.
How to perform a hot fluid check at normal operating temperature.
Using electronic methods via shift selectors for accurate fluid level checks.
Step-by-step guide for electronically checking transmission fluid level.
Maximizing fluid/filter use and clutch system wear monitoring.
Step-by-step guide to enable or disable prognostics features.
Programming the fluid type for accurate prognostics calculations.
Monitors fluid life and alerts when a fluid change is required.
Alerts when transmission fluid filters need replacement.
Monitors clutch life status and alerts when maintenance is required.
Guidelines for determining transmission fluid and filter change intervals.
Steps for draining fluid and replacing filters.
Introduction to diagnostic features and Diagnostic Trouble Codes (DTCs).
How the system responds to active DTCs with diagnostic actions.
Meaning and actions related to the CHECK TRANS warning light.
How to use the shift selector to view diagnostic information.
Procedure for reading and clearing DTCs with keypad selectors.
Procedure for clearing active and stored DTCs.
Procedure for reading and clearing DTCs with bump-shift selectors.
Procedure for clearing DTCs using the bump-shift lever selector.
Illuminates when a service condition related to clutch, fluid, or filter life occurs.
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