Break Chart
Listed below are the axles that will need a different carrier to support certain ratio ranges. If you know what axle you have, what ratio you have and what ratio you want to go to, you can use this to determine if your existing carrier will work. There are some brands who offer “thick” and more rarely “thin” gears. These gear sets allow you to potentially use your existing carrier. If you aren’t sure what you have or need just shoot us a message or give us a call.
Differential Carrier Deck Heights |
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Model 20 |
2.73 & Down |
3.08 & Up |
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Dana 27 |
3.73 & Down |
3.92 & Up |
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Dana 28 |
3.45 & Down |
3.73 & Up |
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Model 35C -Some early models used a thin 3.08 that only fits the 3.55 & up case |
3.31 & Down |
3.55 & Up |
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Dana 30 |
3.54 & Down |
3.73 & Up |
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D36 ICA |
2.73 & Down |
3.07 & Up |
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Dana 44 |
3.73 & Down |
3.92 & Up |
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Dana 60 |
4.10 & Down |
4.56 & Up |
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Dana 61 |
3.31 & down |
3.54 to 4.10 with thick gear |
3.54 to 4.10 with regular gear |
Dana 70 1/2” and 5/8” offset |
4.10 & Down |
4.56 & Up |
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Dana 70 31/32” offset |
3.42 & down |
3.54 to 4.10 |
4.56 & up will NOT fit this housing |
Dana 80 |
3.73 & Down |
4.10 & Up |
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55-64 Chevy passenger - some came stock with thin or thick gears |
3.70 & Down |
4.10 & Up |
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Cast Iron Corvette |
3.90 & Down |
4.10 & Up |
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GM 12 Bolt Passenger |
2.76 & Down |
3.07–3.73 |
3.90 & Up |
GM 12 Bolt Truck |
2.73 & Down |
2.76–3.42 |
3.73 & Up |
GM 10.5″ 14 Bolt Truck |
4.10 & Down |
4.56 & Up |
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GM ’55 Passenger |
3.70 & Down |
4.10 & Up |
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GM 7.2” IFS |
3.08 & Down |
3.23 & Down |
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GM 7.5″ |
3.08 & Down |
3.23 & Up |
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GM(BW) 7.75″ |
2.77 & Down |
3.27 & Up |
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GM 8.2″ |
2.73 & Down |
3.08 & Up |
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BOP 8.2” |
2.76 & down |
2.94 to 3.23 |
3.31 & up |
GM 8.5″ |
2.56 & Down |
2.73 & Up |
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GM AAM 9.5 12 bolt |
3.23 & Down |
3.42 & Up |
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57-62 Early Olds Drop-out 9.3” |
3.23 & Down |
3.55 & Up |
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Toyota 8″ Reverse IFS Clam |
3.73 & Down |
3.91 & Up |
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Chry. 7.25” |
2.47 & Down |
2.76 & Up |
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Chry. 8.25” |
2.45 & Down |
2.56 & Up |
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