H&S transmissions files - Ford Powerstroke Diesel Forum
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post #1 of 9 Old 05-28-2010, 02:37 PM Thread Starter
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H&S transmissions files

What is the difference between H&S firm and the race transmission files? Is it ok to run the race with daily driving and the stock tranny?
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post #2 of 9 Old 05-29-2010, 03:24 AM
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post #3 of 9 Old 05-29-2010, 07:09 AM
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The Race transmission strategies will have a faster and firmer shift speed. This will in no way harm your transmission if you use this for daily driving. It will, however cause axle wrap on the rear end and you may get a double shift feeling. Where it will hit hard twice in a few gears when a load is on it. Ladder bars will take care of this issue.

With the firm transmission files, the trans will slip between the gears to absorb the torque slowly, so that it does not bang into the next gear. This does leave room for error, however, as it can slip too much, rev up, and bang the next gear anyways.

The transmission shifting in these trucks is very delicate, and with the addition of 275 horsepower, it is very difficult to get 100% perfect shifting. Look at it this way, the factory is tuning a trans to shift while applying from 0HP to 300HP at the wheels. Now we have to go in and adapt those same shift strategies to manage from 0HP to nearly 600HP at the wheels.

All in all you if you want the best shifting (even on a stock truck) put ladder bars on and run race shifting.
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post #4 of 9 Old 05-30-2010, 12:54 PM
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good info!!

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post #5 of 9 Old 05-30-2010, 02:43 PM
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Quote:
Originally Posted by H&S Tech View Post
The Race transmission strategies will have a faster and firmer shift speed. This will in no way harm your transmission if you use this for daily driving. It will, however cause axle wrap on the rear end and you may get a double shift feeling. Where it will hit hard twice in a few gears when a load is on it. Ladder bars will take care of this issue.

With the firm transmission files, the trans will slip between the gears to absorb the torque slowly, so that it does not bang into the next gear. This does leave room for error, however, as it can slip too much, rev up, and bang the next gear anyways.

The transmission shifting in these trucks is very delicate, and with the addition of 275 horsepower, it is very difficult to get 100% perfect shifting. Look at it this way, the factory is tuning a trans to shift while applying from 0HP to 300HP at the wheels. Now we have to go in and adapt those same shift strategies to manage from 0HP to nearly 600HP at the wheels.

All in all you if you want the best shifting (even on a stock truck) put ladder bars on and run race shifting.


Pardon my stupid, but I'm curious about the last part. How do the ladder bars factor into the equation? How do they make for the best shifting?
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post #6 of 9 Old 05-30-2010, 03:39 PM
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they dont allow the axle to torque or wrap if you will when the transmission shifts.h&s has a video on their site of how ladder bars help.but basically your axle rotates on stock suspension and takes away from the firmness of a shift and this can brake your axle mounts,suspension,drive shafts,etc.so its not good for your drive train at all.

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post #7 of 9 Old 05-30-2010, 04:21 PM
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Quote:
Originally Posted by 08pwrstrokr6.4 View Post
they dont allow the axle to torque or wrap if you will when the transmission shifts.h&s has a video on their site of how ladder bars help.but basically your axle rotates on stock suspension and takes away from the firmness of a shift and this can brake your axle mounts,suspension,drive shafts,etc.so its not good for your drive train at all.

Ok, so basically some of these threads I read where people are either curious or upset with the firmness of the higher HP shifts from any of the tuners can be somewhat eliminated by installing some sort of traction bars?

If that's the case, that's awesome information!
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post #8 of 9 Old 05-30-2010, 05:32 PM
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Get a set Pro-Comp bars and get after it. The bars made a huge difference on my 6.4 with the Black Maxx.

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post #9 of 9 Old 05-30-2010, 06:30 PM
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Quote:
Originally Posted by 08TWIN6.4L View Post
Get a set Pro-Comp bars and get after it. The bars made a huge difference on my 6.4 with the Black Maxx.
That's awesome.

Thanks for the help!


Sorry about the thread hijack.
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