Exact family and transmission type
Allison 4000 Series is a larger-capacity torque-converter fully automatic transmission family. It is distinct from the 3000 Series and from automated manuals.
Versions and era boundaries
Use exact 4000/4500/4700 model and calibration data for the year and application.
Published ratings and architecture
Ratio, input, GCW, retarder and PTO data apply only to the specific Allison model. Use the data sheet for the exact model; a family maximum does not establish the limit of the installed unit or truck.
Engine and truck relationships
Selected severe-duty, heavy-haul and vocational chassis may offer approved 4000-series variants.
Tag, model-code and software verification
Verify model/serial, calibration, ECU, retarder/PTO configuration, cooling and service records.
Integration and later-swap cautions
Engine, cooling, driveline, axles and body/PTO controls must be engineered together; later installation needs full documentation.
Low-speed, grade and duty-cycle questions
Low-speed manoeuvring, repeated starts, grade, gross weight, heat rejection and PTO duty drive the decision.
Service evidence and road-test scope
Request fluid/service records where applicable, clutch and actuator history for AMTs, control-module fault reports, calibration history and repair invoices. Evaluate engagement, shifts, reverse manoeuvring and warnings in a safe, suitable road test with qualified follow-up for abnormal behaviour.
Reviewed and verification limit
Reviewed September 4, 2026. Torque, gross-combination, PTO and application limits apply only to exact published models and configurations. This page is not a fitment or operating approval.
Verify the individual truck
Build information, component tags, service records, diagnostics and a qualified inspection take priority over general family-level guidance.
Sources & Technical References
Primary manufacturer and government resources for continuing configuration-specific research.
Allison — products