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 MANUALSPONTIAC1984FIERO BASE, STANDARD, MY8REPAIR AND DIAGNOSIS (SINGLE PAGE)TRANSMISSIONAUTOMATIC TRANSOVERHAUL & TESTING - 125C/3T40COMPONENT DISASSEMBLY & REASSEMBLYINPUT CARRIER, INPUT SUN GEAR & INTERNAL GEARINSPECTION
1984 Pontiac Fiero Base, Standard, MY8
Input Carrier, Input Sun Gear & Internal Gear: Inspection
1984 Pontiac Fiero Base, Standard, MY8SECTION Inspection
- Check all parts for pitting, scoring, damaged gear teeth and cracks. Ensure lubrication holes are open. Check input carrier thrust washers for wear and distortion of tangs. See Fig 1 .
- Check carrier pinion pins for tightness. Ensure pins DO NOT rotate. Ensure input carrier pinion end play is .009-.027" (.23-.69 mm).
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.