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 MANUALSPONTIAC1987GRAND PRIX LE, 5.0 HREPAIR AND DIAGNOSIS (SINGLE PAGE)TRANSMISSIONAUTOMATIC TRANSOVERHAUL - 200CTRANSMISSION REASSEMBLYFRONT INTERNAL GEARREAR UNIT END PLAY CHECK
1987 Pontiac Grand Prix LE, 5.0 H
Rear Unit End Play Check
1987 Pontiac Grand Prix LE, 5.0 HSECTION Rear Unit End Play Check
- Loosen adjusting screw on Output Shaft Support (J-25013-5) and push output shaft fully downward. Mount dial indicator and extension on transmission case as shown in Fig 1 . Position indicator button on output shaft. DO NOT clamp indicator to any machined surface.
- Zero dial indicator. Move output shaft upward by turning adjusting screw on output shaft support tool, until White or scribed line on tool sleeve begins to disappear. Read resulting end play on indicator.
- Rear unit end play should be .004-.025" (.10-.64 mm). If not, selective thrust washer located between front internal gear thrust washer and output shaft snap ring must be changed.
- See REAR UNIT SELECTIVE THRUST WASHER . Install correct thickness thrust washer (with I.D. number toward front of case). Reinstall output shaft snap ring making sure it is fully seated in groove.
- Remove dial indicator assembly and loosen adjusting screw on output shaft support tool. Install output shaft-to-turbine shaft front selective thrust washer, locating it on output shaft and retain with petroleum jelly.
REAR UNIT SELECTIVE THRUST WASHER
| Washer Thickness: In. (mm) | I.D. No. | I.D. Color |
|---|---|---|
| .114-.119 (2.90-3.01) | 1 | Orange |
| .121-.126 (3.08-3.19) | 2 | White |
| .128-.133 (3.26-3.37) | 3 | Yellow |
| .135-.140 (3.44-3.55) | 4 | Blue |
| .143-.147 (3.62-3.73) | 5 | Red |
| .150-.154 (3.80-3.91) | 6 | Brown |
| .157-.161 (3.98-4.09) | 7 | Green |
| .164-.168 (4.16-4.27) | 8 | Black |
| 1.71-.175 (4.34-4.45) | 9 | Purple |
RENDER: 1.0x
NO RELATED
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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.