Complete service for your Allison Bus "AT" Series Transmission
US Transmissions is an Allison Transmission authorized service center.
We provide reman units, parts, repair, and maintenance for all Allison On Highway Transmissions.
About the “AT” Series
The Allison AT500 and AT1500P-series transmissions are fully automatic, with hydraulic controls and torque converter drive. All models have four forward speeds and one reverse, and are used primarily on-highway applications. Hydraulic shift controls provide automatic gear selection in each drive range and, for the AT1500P-series models, automatic engagement of the lockup clutch. The AT series transmissions can be installed behind engines with SAE#2 or SAE#3 bell housing, with shift calibrations available from 2200RPM to 4000RPM.
Features of the Allison AT Series Transmission
Fully automatic up to 4 forward speeds
Lockup available in the AT 1542/1545 Series
Power takeoff drive provision
Neutral start and reverse signal provision
Parking brake option
Multiple Torque Converter ratios
Pickup and Delivery truck
Flat Bed Truck