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Transmission Manufacturer Code
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Shifter Manufacturer
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Number of Gears
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Input Shaft Diameter
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- 1.387 in. (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Shifter Included
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- No (1)
First Gear Ratio
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- 2.97:1 (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
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Second Gear Ratio
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Third Gear Ratio
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- 1.34:1 (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- 1.46:1 (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Fifth Gear Ratio
- 0.72:1 (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- 0.74:1 (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- 0.80:1 (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.

1999 American Powertrain Manual Transmission and Installation Kit Combos

Showing All Customizable Items, Including Not in Stock Items

Individual Parts

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Results 1 - 3 of 3

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1975-1986 C10, 1960-1974 C10 PICKUP, 1988-1999 C1500 - COGM-T1G

Transmission Combo, Tremec T-56, 6-Speed, Chevy, 2.66:1 First Gear, 0.63:1 Fifth Gear, Kit

Part Number: AWR-COGM-T1G

Not Yet Reviewed

Estimated Ship Date: Apr 30, 2026 if ordered today

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Estimated Ship Date: Apr 30, 2026 if ordered today

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American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits for 1975-1986 C10, 1960-1974 C10 PICKUP, 1988-1999 C1500 - COGM-T1J

Transmission Combo, Tremec T-56, 6-Speed, Chevy, 2.97:1 First Gear, 0.50:1 Fifth Gear, Kit

Part Number: AWR-COGM-T1J

Not Yet Reviewed

Estimated Ship Date: Apr 30, 2026 if ordered today

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Estimated Ship Date: Apr 30, 2026 if ordered today

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American Powertrain ProFit Tremec TKX Manual Transmission and Installation Kits COCH-B1EX

Manual Transmission and Installation Kit Combos, ProFit Tremec TKX Manual Tansmission, 5 Gears, 1.387 in. 26-spline Input, Crossmember, Chevrolet, Kit

Part Number: AWR-COCH-B1EX

Not Yet Reviewed

Estimated Ship Date: Apr 27, 2026 if ordered today

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Estimated Ship Date: Apr 27, 2026 if ordered today

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