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Notes: 1975: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C · 1976: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1977: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1978: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1979: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1980: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1981: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier
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Notes: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C
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Notes: 1975: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C · 1976: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1977: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1978: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1979: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1980: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1981: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier
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Notes: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C
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Notes: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier
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Notes: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C
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Notes: GM 12 Bolt Truck; Thick; 4.11 Ratio
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Notes: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier
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Notes: GM 12 Bolt Truck; Thick; 4.11 Ratio
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Notes: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier
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Notes: GM 12 Bolt Truck; Thick; 4.11 Ratio
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Notes: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier
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Notes: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C
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Notes: 1987: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C · 1988: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier
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Notes: 1987: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C · 1988: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier
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Notes: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C
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Notes: 1975: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C · 1976: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1977: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1978: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier
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Notes: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C
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Notes: 1977: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C · 1978: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier
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Notes: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C
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Notes: 1975: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C · 1976: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1977: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1978: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier
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Notes: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C
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Notes: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier
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Notes: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C
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Notes: 1975: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C · 1976: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1977: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1978: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier
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Notes: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C
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Notes: 1975: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C · 1976: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1977: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1978: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier
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Notes: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C
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Notes: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier
—
Notes: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C
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Notes: 1975: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C · 1976: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C · 1977: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1978: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier
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Notes: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C
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Notes: 1975: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C · 1976: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C · 1977: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1978: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier
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Notes: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C
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Notes: 1975: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C · 1976: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C · 1977: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1978: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier
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Notes: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C
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Notes: 1975: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C · 1976: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C · 1977: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1978: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier
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Notes: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier
—
Notes: 1975: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C · 1976: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1977: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1978: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1979: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1980: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1981: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1982: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1983: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1984: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1985: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1986: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier
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Notes: GM 12 Bolt Truck; Thick; 4.11 Ratio
—
Notes: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C
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Notes: 1975: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C · 1976: GM 12 Bolt Truck; Thick; 4.11 Ratio · 1977: GM 12 Bolt Truck; Thick; 4.11 Ratio · 1978: GM 12 Bolt Truck; Thick; 4.11 Ratio · 1979: GM 12 Bolt Truck; Thick; 4.11 Ratio · 1980: GM 12 Bolt Truck; Thick; 4.11 Ratio · 1981: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C · 1982: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C · 1983: GM 12 Bolt Truck; Thick; 4.11 Ratio · 1984: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C · 1985: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C · 1986: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C
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Notes: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier
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Notes: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C
—
Notes: 1975: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C · 1976: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1977: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1978: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1979: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1980: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier · 1981: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier
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Notes: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier
—
Notes: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C
—
Notes: GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down Carrier
—
Notes: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C
—
Notes: GM 12 Bolt Truck; Thick; 4.11 Ratio GM 12 Bolt Truck; Thick Ring and Pinion Set; 4.11 Ratio; Fits 3 series 3.42 & Down C
- + 203 additional fitments not shown