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 MANUALSGMC1966I1000 STANDARD TRANS, TRANS MFR CD 435GAREPAIR AND DIAGNOSIS (SINGLE PAGE)DRIVELINES & AXLESDIFFERENTIALS & DRIVE AXLESEATON (ONE PC. CASE) LOCKING DIFFERENTIALLUBRICATION
1966 GMC I1000 Standard Trans, Trans Mfr CD 435GA
EATON (One Pc. Case) Locking Differential: Lubrication
1966 GMC I1000 Standard Trans, Trans Mfr CD 435GASECTION Lubrication
Check level of lubricant every 6, 000 miles and drain and refill differential every 24, 000 miles (more often during periods of extremely severe use). When servicing differential use only special positraction lubricant.
RENDER: 1.0x
NO RELATED
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Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.