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  #1  
Old 01-16-2010, 06:09 PM
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zf5 or zf6

Which one of these transmissions are stronger? i plan on doing a cummins swap and i can't pick which transmission to use.
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  #2  
Old 01-16-2010, 08:09 PM
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anybody have any thoughts?
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Old 01-23-2010, 06:37 PM
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I am not sure exactly which one is stronger but Id say just get the zf 5 because than you dont have to make your own crossmember and the zf6 just has a very low 1st gear
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Old 01-23-2010, 06:44 PM
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I say ZF6 because it will give you a better gear range and they are newer. Normally newer transmissions are designed to handle more power. Just my thought. Not to mention you hear a lot about high powered PSD and cummins using these transmissions.
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Old 01-23-2010, 08:44 PM
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thanks for the information guys, i still need to get the new motor and get ride of the 7.3 before i change the transmissions.
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Old 01-23-2010, 08:54 PM
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i have a 6 speed in mine, plett of power where i need it and never had a problem, everybody that i have talked to says the 6 speed can take more power
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