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ZF-5 power capacity.

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Old Yesterday, 08:41 PM
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ZF-5 power capacity.

How much power are all of you running through your ZF5s, and are they the 42, or the 47? I've just been curious lately about how much they'll actually handle safely.
Thanks guys,
~Christopher
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Old Today, 06:20 AM
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With a good clutch, throw whatever you want at it and don't look back.
Sorry to be vague, but that's about it.
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Old Today, 06:22 AM
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First you have to have a clutch that will pit the power down.

I'm not sure what the ceiling is but there are several 500+ HP trucks reliably running them.
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Old Today, 06:33 AM
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The number represents how much torque it can handle.

S5-42 = 420 foot pounds of torque
S5-47 = 470 foot pounds of torque
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Old Today, 06:39 AM
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Quote:
Originally Posted by Vertrees View Post
The number represents how much torque it can handle.

S5-42 = 420 foot pounds of torque
S5-47 = 470 foot pounds of torque
Many trucks on here pushing double those TQ numbers without problems.
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Old Today, 07:02 AM
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Quote:
Originally Posted by tshrager View Post
Many trucks on here pushing double those TQ numbers without problems.
I have no doubt, but that is what they are factory rated for. I have a lift rated for 800 lbs, and I have no problems lifting 2,000 lbs with the little guy. That's just the cap they post to keep from shortening the life, or detonating your trans.

They may have taken pay load into consideration as well when figuring up these numbers. putting 600 lbs of torque with no load is way less stress than with a 8,000 lbs pay load.
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Old Today, 08:27 AM
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I am not arguing with the data, but I do find it odd. Considering I put my essentially stock truck on the rollers a couple years ago just for the fun of it and put down about 207hp and just over 500 fblbs of torque. Which would mean a stock truck would push beyond the limits of the transmission.
I can do alittle better than that now but either way they do a good job of handling the hp these trucks generate. If you are wanting to do some serious mods then, as previously stated, the clutch is really the only thing you have to keep in mind. Otherwise, have fun!
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