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 MANUALSPONTIAC1984FIREBIRD V6-173 2.8LPARTS AND LABORTRANSMISSION AND DRIVETRAINAUTOMATIC TRANSMISSION/TRANSAXLESPEEDOMETER GEAR, A/TPARTS INFORMATION
1984 Pontiac Firebird V6-173 2.8L
Parts Information
1984 Pontiac Firebird V6-173 2.8LSECTION Parts Information
| Part | Manufacturer | OEM Part # | Price | Notes |
| THM-200C, 3 Speed | ||||
| Speedometer Driven Gear | ||||
| 18 Teeth | GMO | 3987918 | 7.07 | Parts & Prices For Estimating Purposes. Order Number & Color. |
| 35 Teeth | GMO | 9780628 | 10.89 | Parts & Prices For Estimating Purposes. Order Number & Color. |
| 40 Teeth | GMO | 1362048 | 8.28 | Contact Dealer for most current part and price information. Parts & Prices For Estimating Purposes. Order Number & Color. |
| 45 Teeth | GMO | 9775187 | 8.28 | Contact Dealer for most current part and price information. Parts & Prices For Estimating Purposes. Order Number & Color. |
| Speedometer Drive Gear | ||||
| 18 Teeth | GMO | 8623316 | 7.60 | Contact Dealer for most current part and price information. |
| 19 Teeth | GMO | 8628891 | 6.30 | Contact Dealer for most current part and price information. |
| 20 Teeth | GMO | 8628894 | 5.83 | |
| 21 Teeth | GMO | 8629549 | 7.80 | |
| THM 700-R4/4L60 | ||||
| Speedometer Driven Gear | ||||
| Order By Description. | ||||
| Speedometer Drive Gear | ||||
| Order By Description. |
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.