TM 10-3930-671-24 Transaxle Application Truck Model Transaxle Model Designation Ratios Overall Torque Conv. GPX 25E Clark Powershift TA18 1 15.587:1 3.00 Drive Axles TA18   has   straight   axle   with   drum   brakes   at   drive wheels Transaxle Specifications CLARK TA18 General Description Single-speed   power   shift   transmission   with   integral   drive   axle.      Full floating  straight  axle  with  self-adjusting  drum-and-shoe  brakes  at  drive wheels.      Gear-driven   pump   drive.      Direction   (shift)   control   operated electrically.    Inching  control  operated  hydraulically.    Accumulator-type control valve.  Transmission fluid radiator-cooled. Basic Specifications No.  Ratios: 1-speed, forward and reverse Overall Ratios: (Fwd) 15.587:1 (Rev) 16.167:1 Transmission Ratio: (Fwd) 2.798  (Rev) 2.902:1 Drive Axle Ratio: 5.571:1 Ring & Pinion Gear Type: Spiral Bevel Differential Type: 2-pinion Torque Converter Size: 11 in. Torque Converter Stall Ratio: 3.00:1 Main Hyd Pump Drive Ratio: 1.03 x engine rpm Charge Pump Flow, min.: 9.1 gpm Regulator Valve Pressure: 150-190 psi Convector In/Lube Pressure, min.: 30 psi Clutch Pressure, Fwd & Rev, max.: 135-170 psi Dry Weight: 600 lbs Oil Capacity, Initial Fill: 16 quarts Oil Capacity, Refill: 13 quarts F-21