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 MANUALSCHEVROLET1990LUMINA APV V6-191 3.1LREPAIR AND DIAGNOSISTRANSMISSION AND DRIVETRAINAUTOMATIC TRANSMISSION/TRANSAXLESERVICE AND REPAIROVERHAULGOVERNOR & SPEEDOMETER GEAR
1990 Chevrolet Lumina APV V6-191 3.1L
Governor & Speedometer Gear
1990 Chevrolet Lumina APV V6-191 3.1LSECTION Governor & Speedometer Gear
Inspection & Installation
1. Inspect for plugged oil passage.
2. Inspect governor driven gear for nicks and damage.
3. Inspect governor shaft seal ring for cuts, damage and free fit in groove.
4. Inspect for free operation of governor weights. Weights must operate freely and independently of each other.
5. Inspect governor spring for damage and correct installation.
6. Inspect for the presence of two check balls, if equipped.
7. Inspect shaft for damage.
8. If damaged, cut seal ring off governor shaft. Install new seal and lubricate with petroleum jelly.
9. Install speedometer drive gear and thrust washer onto governor assembly.
10. Install governor cover and retaining bolts. Refer to "Torque Specifications Chart" for torque values. Make sure governor shaft is piloted in governor cover before torquing retaining bolts.
11. Install speedometer driven gear and retainer and screw. Refer to "Torque Specifications Chart" for torque values.
12. Install converter. Ensure all shafts are fully engaged.
1. Inspect for plugged oil passage.
2. Inspect governor driven gear for nicks and damage.
3. Inspect governor shaft seal ring for cuts, damage and free fit in groove.
4. Inspect for free operation of governor weights. Weights must operate freely and independently of each other.
5. Inspect governor spring for damage and correct installation.
6. Inspect for the presence of two check balls, if equipped.
7. Inspect shaft for damage.
8. If damaged, cut seal ring off governor shaft. Install new seal and lubricate with petroleum jelly.
9. Install speedometer drive gear and thrust washer onto governor assembly.
10. Install governor cover and retaining bolts. Refer to "Torque Specifications Chart" for torque values. Make sure governor shaft is piloted in governor cover before torquing retaining bolts.
11. Install speedometer driven gear and retainer and screw. Refer to "Torque Specifications Chart" for torque values.
12. Install converter. Ensure all shafts are fully engaged.
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.