4x4 boosted launch? - Ford Powerstroke Diesel Forum
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post #1 of 54 Old 12-23-2010, 04:28 PM Thread Starter
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4x4 boosted launch?

I've read several posts that this is talked about... yeah, I'm for real... how's it done and is there any danger in hurting the tranny?

Danny

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post #2 of 54 Old 12-23-2010, 05:27 PM
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Flip the switch to 4X4 High, power-brake until your boost is where you want it, and then let er' rip. Not sure on the tranny. I've done it a few times, and haven't noticed any ill effects *knock on wood*

Matt


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post #3 of 54 Old 12-23-2010, 05:32 PM
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i don't see it being a good idea.

4wd is built to be driven in loose terrain where the tires can spin, they don't spin at exactly the same rate as the rear, so the lose terrain allows it to work properly with no binding. on drive pavement you will have binding.

now after saying that, people have done it with no issues, i never did it because i can't afford to break it. i just wouldn't do it over and over and expect for it to last.
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post #4 of 54 Old 12-23-2010, 05:52 PM
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Its fine i do it all the time

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post #5 of 54 Old 12-23-2010, 06:11 PM
Let's go B's!!!!

 
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Ive done it just as the second poster describes dozens upon dozens of times. Theres no binding when you are going straight.

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post #6 of 54 Old 12-23-2010, 06:37 PM
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I have done it a bunch of times and my bts tranny will be here on the 6th

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post #7 of 54 Old 12-23-2010, 07:23 PM
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Quote:
Originally Posted by 75' forty View Post
i don't see it being a good idea.

4wd is built to be driven in loose terrain where the tires can spin, they don't spin at exactly the same rate as the rear, so the lose terrain allows it to work properly with no binding. on drive pavement you will have binding.

now after saying that, people have done it with no issues, i never did it because i can't afford to break it. i just wouldn't do it over and over and expect for it to last.
if the front has different gears than the rear than why does the manual say its ok to run it in 4x4 up to 75 mph, i think if it was going to bind i don't think they would recommend that. so i'm pretty sure the front and rear have the same gears.

to the op, don't worry, you should be fine

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post #8 of 54 Old 12-23-2010, 07:47 PM
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the 4X4 is designed with slightly different ratios so that the front tires 'pull' you, but its so minimal that it doesn't harm anything, the tires will slip enough to compensate even though you wont notice.

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post #9 of 54 Old 12-23-2010, 07:55 PM
shhhhh, can you hear it?

 
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the stock tranny may take this abuse for a little while but its almost certain it will fail sooner than later if this is done on a normal basis.

Patrick
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Quote:
Originally Posted by Diesel Tech Mag
All you need is a little knowledge,the right tools, and a buddy's truck to practice on.
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post #10 of 54 Old 12-23-2010, 09:30 PM
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wtf?

Quote:
Originally Posted by Beef52751 View Post
the 4X4 is designed with slightly different ratios so that the front tires 'pull' you, but its so minimal that it doesn't harm anything, the tires will slip enough to compensate even though you wont notice.
No manufactured vehicle EVER (not even chrystler has came with different gear ratios front to rear). try running a 4.10 ring and pinion in the front and a 3.73 in the rear, put it in 4wd on pavement and tell me you don't notice it. when you have a driveshaft lying on the ground you'll eat those words
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