J-26417-A Hydraulic Pressure Gauge Set ATT-26417-A For Allison. This tool is used to measure the pressure points of Allison transmissions during diagnostic test. Used on Allison model AT 540, AT 543, AT 545, MT 640, MT 643, MT 650, MT 653, MT(B) 644, MT(B) 654CR, CLT 654 transmission.
