Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSVOLVO1993940 TURBO, 4D SEDAN, AW71REPAIR AND DIAGNOSIS (SINGLE PAGE)TRANSMISSIONAUTOMATIC TRANSOVERHAUL - AW70L, AW71 & AW72LPERFORMANCE TESTSHYDRAULIC PRESSURE TESTGOVERNOR PRESSURE TEST
1993 Volvo 940 Turbo, 4D Sedan, AW71
Governor Pressure Test
1993 Volvo 940 Turbo, 4D Sedan, AW71SECTION Governor Pressure Test
- Ensure line pressure is correct before checking governor pressure. See LINE PRESSURE TEST under HYDRAULIC PRESSURE TEST.
- With engine off, remove pressure tap plug from governor pressure tap. See Fig 1 . Install pressure gauge on governor pressure tap. Start engine.
- Ensure no governor pressure exists with engine idling with shift lever in "D" and "R" positions. Position pressure gauge so governor pressure may be monitored while driving vehicle.
- Drive vehicle and note governor pressure at specified speeds. See GOVERNOR PRESSURE SPECIFICATIONS . Governor pressure should be within specification.
- If governor pressure is not within specification, see HYDRAULIC PRESSURE TEST TROUBLE SHOOTING . Shut engine off. Remove pressure gauge. Install pressure tap plug.
GOVERNOR PRESSURE SPECIFICATIONS
| Vehicle Speed | psi (kg/cm (2) ) | ||
|---|---|---|---|
| 240 | |||
| With 3.73:1 Final Drive Ratio | |||
| 19 MPH | 13-21 (.9-1.5) | ||
| 34 MPH | 23-32 (1.6-2.3) | ||
| 67 MPH | 58-75 (4.1-5.3) | ||
| With 3.91:1 Final Drive Ratio | |||
| 19 MPH | 13-21 (.9-1.5) | ||
| 33 MPH | 23-32 (1.6-2.3) | ||
| 64 MPH | 58-75 (4.1-5.3) | ||
| 940 & 940 Turbo | |||
| With 3.54:1 Final Drive Ratio | |||
| 21 MPH | 16-24 (3.9-1.7) | ||
| 34 MPH | 24-32 (1.7-2.3) | ||
| 68 MPH | 54-71 (3.8-5.0) | ||
| With 3.73:1 Final Drive Ratio | |||
| 19 MPH | 13-21 (.9-1.5) | ||
| 34 MPH | 23-31 (1.6-2.2) | ||
| 67 MPH | 58-75 (4.1-5.3) | ||
| With 3.91:1 Final Drive Ratio | |||
| 18 MPH | 13-21 (.9-1.5) | ||
| 33 MPH | 23-31 (1.6-2.2) | ||
| 64 MPH | 58-75 (4.1-5.3) | ||
| With 4.10:1 Final Drive Ratio | |||
| 17 MPH | 13-21 (.9-1.5) | ||
| 45 MPH | 23-31 (1.6-2.2) | ||
| 61 MPH | 58-75 (4.1-5.3) | ||
HYDRAULIC PRESSURE TEST TROUBLE SHOOTING
| Application | Probable Cause | |
|---|---|---|
| Line Pressure | ||
| Low Line Pressure | Primary Regulator Valve Or Throttle Valve Sticking, Defective Oil Pump Or Relief Valve, Restricted Oil Strainer, Defective Accumulator Piston | |
| No Line Pressure & Vehicle Will Not Move In "R" | Defective Primary Regulator, 2-3 Shift Valve Or Reverse Clutch Sequence Valve, Defective Rear Clutch Accumulator Piston, Loose Center Support Assembly Bolts | |
| High Line Pressure In All Ranges | Defective Or Improperly Adjusted Kickdown Cable, Throttle Valve Sticking, Primary Regulator Valve Sticking, Sticking Shift Or Cut-Back Valves | |
| Line Pressure Is Correct But Drops After A Few Seconds | Defective Secondary Regulator Valve | |
| Governor Pressure | ||
| Pressure Not Within Specification | Incorrect Line Pressure, Oil Pressure Leakage In Governor Hydraulic Circuit, Faulty Governor | |
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.