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(2) Leave vehicle on hoist and leave Gauge C-3292 in place at accumulator port. (3) Move Gauge C-3293-SP over to front servo port for this test. (4) Have helper start and run engine at 1600 rpm for this test. (5) Move transmission shift lever two detents rear- ward from full forward position. This is D range. (6) Read pressures on both gauges as transmission throttle lever is gradually moved from full forward to • Line pressure at accumulator in D range third gear, should be 54-60 psi (372-414 kPa) with throttle • Front servo pressure in D range third gear, should be within 3 psi (21 kPa) of line pressure up to Test Four—Transmission In Reverse NOTE: This test checks pump output, pressure reg- (1) Leave vehicle on hoist and leave gauge C-3292 in place at accumulator port. (2) Move 300 psi Gauge C-3293-SP back to rear servo port. (3) Have helper start and run engine at 1600 rpm for test. (4) Move transmission shift lever four detents rearward from full forward position. This is Reverse (5) Move transmission throttle lever fully forward then fully rearward and note reading at Gauge (6) Pressure should be 145 - 175 psi (1000-1207 kPa) with throttle lever forward and increase to 230 - Test Five—Governor Pressure NOTE: This test checks governor operation by (1) Move 100 psi Test Gauge C-3292 to governor pressure port. (2) Move transmission shift lever two detents rear- ward from full forward position. This is D range. (3) Have helper start and run engine at curb idle speed. Then firmly apply service brakes so wheels (4) Note governor pressure: kPa (3 psi) at curb idle speed and wheels not rotat- • If pressure exceeds 20.6 kPa (3 psi), a fault exists in governor pressure control system. (5) Release brakes, slowly increase engine speed, and observe speedometer and pressure test gauge (do (6) Governor pressure rise should be smooth and drop back to no more than 20.6 kPa (3 psi), after (7) Compare results of pressure test with analysis chart. Fig. 66 Pressure Test Port Locations 1 – REAR SERVO TEST PORT 21 - 210 46RE AUTOMATIC TRANSMISSION DN DIAGNOSIS AND TESTING (Continued) |