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Reference / Transmissions

Find your swap gearbox.

Choose the exact ratio set. Your engine limit and axle ratio stay with your build.

Includes all 15 TREMEC entries in its published calculator, plus additional manufacturer references and Nissan CD009 / CD00A. These are ratio references, not a fitment guarantee. Different splines, bellhousings and release systems can share the same ratios. Reviewed September 10, 2026.

TREMEC swaps

TREMEC T-5 2.95 - .63

Gear 1
2.950
Gear 2
1.940
Gear 3
1.340
Gear 4
1.000
Gear 5
0.630
Reverse
2.760

Official calculator ratio set. Confirm the assembly tag and overdrive option before ordering.

TREMEC swaps

TREMEC Magnum XL 2.66 - .50

Gear 1
2.660
Gear 2
1.780
Gear 3
1.300
Gear 4
1.000
Gear 5
0.740
Gear 6
0.500
Reverse
2.900

Official calculator ratio set. Confirm the assembly tag and overdrive option before ordering.

TREMEC swaps

TREMEC Magnum XL 2.97 - .63

Gear 1
2.970
Gear 2
2.100
Gear 3
1.460
Gear 4
1.000
Gear 5
0.800
Gear 6
0.630
Reverse
2.900

Official calculator ratio set. Confirm the assembly tag and overdrive option before ordering.

TREMEC swaps

TREMEC Magnum 2.66 - .63

Gear 1
2.660
Gear 2
1.780
Gear 3
1.300
Gear 4
1.000
Gear 5
0.800
Gear 6
0.630
Reverse
2.900

Official calculator ratio set. Confirm the assembly tag and overdrive option before ordering.

TREMEC swaps

TREMEC Magnum 2.97 - .50

Gear 1
2.970
Gear 2
2.100
Gear 3
1.460
Gear 4
1.000
Gear 5
0.740
Gear 6
0.500
Reverse
2.900

Official calculator ratio set. Confirm the assembly tag and overdrive option before ordering.

TREMEC swaps

TREMEC Magnum-F 2.66 - .63

Gear 1
2.660
Gear 2
1.780
Gear 3
1.300
Gear 4
1.000
Gear 5
0.800
Gear 6
0.630
Reverse
2.900

Official calculator ratio set. Confirm the assembly tag and overdrive option before ordering.

TREMEC swaps

TREMEC Magnum-F 2.97 - .63

Gear 1
2.970
Gear 2
2.100
Gear 3
1.460
Gear 4
1.000
Gear 5
0.800
Gear 6
0.630
Reverse
2.900

Official calculator ratio set. Confirm the assembly tag and overdrive option before ordering.

TREMEC swaps

TREMEC Magnum-F 2.66 - .50

Gear 1
2.660
Gear 2
1.780
Gear 3
1.300
Gear 4
1.000
Gear 5
0.740
Gear 6
0.500
Reverse
2.900

Official calculator ratio set. Confirm the assembly tag and overdrive option before ordering.

TREMEC swaps

TREMEC Magnum-F 2.97 - .50

Gear 1
2.970
Gear 2
2.100
Gear 3
1.460
Gear 4
1.000
Gear 5
0.740
Gear 6
0.500
Reverse
2.900

Official calculator ratio set. Confirm the assembly tag and overdrive option before ordering.

TREMEC swaps

TREMEC TKO-500 3.27 - .68

Gear 1
3.270
Gear 2
1.980
Gear 3
1.340
Gear 4
1.000
Gear 5
0.680
Reverse
3.000

Official calculator ratio set. Confirm the assembly tag and overdrive option before ordering.

TREMEC swaps

TREMEC TKO-600 2.87 - .64

Gear 1
2.870
Gear 2
1.890
Gear 3
1.280
Gear 4
1.000
Gear 5
0.640
Reverse
2.560

Official calculator ratio set. Confirm the assembly tag and overdrive option before ordering.

TREMEC swaps

TREMEC TKO-600 2.87 - .82

Gear 1
2.870
Gear 2
1.890
Gear 3
1.280
Gear 4
1.000
Gear 5
0.820
Reverse
2.560

Official calculator ratio set. Confirm the assembly tag and overdrive option before ordering.

TREMEC swaps

TREMEC TKX 3.27 - .72

Gear 1
3.270
Gear 2
1.980
Gear 3
1.340
Gear 4
1.000
Gear 5
0.720
Reverse
3.000

Official calculator ratio set. Confirm the assembly tag and overdrive option before ordering.

TREMEC swaps

TREMEC TKX 2.87 - .81

Gear 1
2.870
Gear 2
1.890
Gear 3
1.280
Gear 4
1.000
Gear 5
0.810
Reverse
2.560

Official calculator ratio set. Confirm the assembly tag and overdrive option before ordering.

TREMEC swaps

TREMEC TKX 2.87 - .68

Gear 1
2.870
Gear 2
1.890
Gear 3
1.280
Gear 4
1.000
Gear 5
0.680
Reverse
2.560

Official calculator ratio set. Confirm the assembly tag and overdrive option before ordering.

TREMEC swaps

TREMEC Magnum 2.97 - .63

Gear 1
2.970
Gear 2
2.100
Gear 3
1.460
Gear 4
1.000
Gear 5
0.800
Gear 6
0.630
Reverse
2.900

Manufacturer aftermarket ratio table. Fitment and clutch release arrangements vary by assembly.

TREMEC swaps

TREMEC Magnum XL 2.66 - .63

Gear 1
2.660
Gear 2
1.780
Gear 3
1.300
Gear 4
1.000
Gear 5
0.800
Gear 6
0.630
Reverse
2.900

Manufacturer aftermarket ratio table. Fitment and clutch release arrangements vary by assembly.

TREMEC swaps

TREMEC TR-4050 6.16 - .76

Gear 1
6.160
Gear 2
3.110
Gear 3
1.710
Gear 4
1.000
Gear 5
0.760
Reverse
6.030

Manufacturer aftermarket ratio table. Fitment and clutch release arrangements vary by assembly.

Nissan swaps

Nissan CD009 (FS6R31A 6-speed swap)

Gear 1
3.794
Gear 2
2.324
Gear 3
1.624
Gear 4
1.271
Gear 5
1.000
Gear 6
0.794
Reverse
3.446

2006 350Z factory manual, MT-58 (the mirror URL is mislabeled). CD00A supersession cross-reference: Z1 transmission guide. External slave-cylinder family; later JK gearboxes require separate fitment checks.

Nissan swaps

Nissan CD00A (FS6R31A 6-speed swap)

Gear 1
3.794
Gear 2
2.324
Gear 3
1.624
Gear 4
1.271
Gear 5
1.000
Gear 6
0.794
Reverse
3.446

2006 350Z factory manual, MT-58 (the mirror URL is mislabeled). CD00A supersession cross-reference: Z1 transmission guide. External slave-cylinder family; later JK gearboxes require separate fitment checks.

Planning an adapter swap? Collins Performance Technologies publishes its available adapter kits. Confirm the exact engine, gearbox and clutch package with the supplier.

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