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Home >> Volvo >> 1993 >> 850 Standard >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Diagnosis - Aw50-42LE >> Testing >> Time Lag Test

Time Lag Test

  1. Engine and transaxle must be at normal operating temperature. Start engine and ensure idle RPM is within specification with A/C off. Apply service and parking brakes. Using stop watch, measure time until engagement shock is felt when shift lever is shifted from "N" to "D" position.
  2. Allow one minute intervals between tests. Perform time measurement several times and calculate average time. Time should be less than .7 seconds. Repeat test procedure to test time lag when shift lever is shifted from "N" to "R" position. Time lag should be less than 1.2 seconds. If test time is not as described, check transaxle line pressure. See HYDRAULIC PRESSURE TEST .
SHIFT SPEED SPECIFICATIONS (1)

Application MPH
2.3L Turbo
Economy Mode
1st-2nd 25
2nd-3rd 51
3rd-4th 76
4th-3rd 53
3rd-2nd 31
2nd-1st 16
Sport Mode
1st-2nd 36
2nd-3rd 69
3rd-4th 106
4th-3rd 62
3rd-2nd 47
2nd-1st 26
2.4L (10-Valve)
Economy Mode
1st-2nd 25
2nd-3rd 46
3rd-4th 69
4th-3rd 57
3rd-2nd 37
2nd-1st 18
Sport Mode
1st-2nd 38
2nd-3rd 67
3rd-4th 106
4th-3rd 95
3rd-2nd 54
2nd-1st 26
2.4L (20-Valve)
Economy Mode
1st-2nd 24
2nd-3rd 48
3rd-4th 75
4th-3rd 60
3rd-2nd 36
2nd-1st 15
Sport Mode
1st-2nd 35
2nd-3rd 68
3rd-4th 101
4th-3rd 86
3rd-2nd 57
2nd-1st 24
(1) With shift lever in "D" position and throttle valve open 60 percent.
LOCK-UP SPEED SPECIFICATIONS (1)(2)

Application MPH
2.3L Turbo (3)
Economy & Sport Mode
Lock-Up ON (4th Gear) 129
Lock-Up OFF (4th Gear) 124
2.4L (10-Valve)
Economy Mode
Lock-Up ON
2nd Gear 23
3rd Gear 45
4th Gear 68
Lock-Up OFF
2nd Gear 21
3rd Gear 42
4th Gear 63
Sport Mode
Lock-Up ON
2nd Gear 34
3rd Gear 63
4th Gear 96
Lock-Up OFF
2nd Gear 30
3rd Gear 58
4th Gear 71
2.4L (20-Valve)
Economy Mode
Lock-Up ON
2nd Gear 25
3rd Gear 49
4th Gear 73
Lock-Up OFF
2nd Gear 23
3rd Gear 44
4th Gear 68
Sport Mode
Lock-Up ON
2nd Gear 35
3rd Gear 65
4th Gear 96
Lock-Up OFF
2nd Gear 33
3rd Gear 60
4th Gear 90
(1) With shift lever in "D" position and throttle valve open 60 percent.
(2) Lock-up does not occur in 2nd gear until fluid temperature exceeds 239°F (115°C).
(3) Lock-up occurs in 4th gear only.