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.
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HOMESERVICE MANUALSPONTIAC1983GRAND PRIX BASE, 5.0 HREPAIR AND DIAGNOSISTRANSMISSIONAUTOMATIC TRANSOVERHAUL - 350CCONTROL PRESSURE CHECKCONTROL PRESSURE SPECIFICATIONS
1983 Pontiac Grand Prix Base, 5.0 H
Control Pressure Specifications
1983 Pontiac Grand Prix Base, 5.0 HSECTION Control Pressure Specifications
CONTROL PRESSURE SPECIFICATIONS (MODELS XA)
| Shift Lever Range | Model I.D. Code | Modulator (1) Line Connected psi (kg/cm2 ) | Modulator (2) Line Disconnected psi (kg/cm2 ) | ||||||
|---|---|---|---|---|---|---|---|---|---|
| DRIVE (3) BRAKES APPLIED | XA | 68-88 (4.8-6.2) | 148-171 (10.4-12.0) | ||||||
| L2 or L1 (3) BRAKES APPLIED | XA | 89-111 (6.3-7.8) | 148-172 (10.4-12.1) | ||||||
| REVERSE (3) BRAKES APPLIED | XA | 102-134 (7.2-9.4) | 226-259 (15.9-18.2) | ||||||
| NEUTRAL BRAKES APPLIED | XA | 68-86 (4.8-6.0) | 148-170 (10.4-12.0) | ||||||
| DRIVE IDLE SET ENGINE IDLE TO SPECIFICATIONS BRAKES APPLIED | XA | 68-88 (4.8-6.2) | N/A | ||||||
| DRIVE - 30 MPH CLOSED THROTTLE OR ON HOIST | XA | 68-88 (4.8-6.2) | N/A | ||||||
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CONTROL PRESSURE SPECIFICATIONS (MODELS XX)
| Shift Lever Range | Model I.D. Code | Modulator (1) Line Connected psi (kg/cm2 ) | Modulator (2) Line Disconnected psi (kg/cm2) | ||||||
|---|---|---|---|---|---|---|---|---|---|
| DRIVE (3) BRAKES APPLIED | XX | 55-64 (3.9-4.5) | 148-173 (10.4-12.2) | ||||||
| L2 or L1 (3) BRAKES APPLIED | XX | 80-93 (5.6-6.5) | 148-173 (10.4-12.2) | ||||||
| REVERSE (3) BRAKES APPLIED | XX | 83-97 (5.8-6.8) | 237-270 (16.7-19.0) | ||||||
| NEUTRAL BRAKES APPLIED | XX | 55-62 (3.9-4.4) | 148-173 (10.4-12.2) | ||||||
| DRIVE IDLE SET ENGINE IDLE TO SPECIFICATIONS BRAKES APPLIED | XX | 55-64 (3.9-4.5) | N/A | ||||||
| DRIVE - 30 MPH CLOSED THROTTLE OR ON HOIST | XX | 55-64 (3.9-4.5) | N/A | ||||||
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RENDER: 1.0x
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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.