Suggestions for adding power

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Jun 4, 2011 | 08:28 PM

rtrapp

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Suggestions for adding power

2005 5.4 liter 373 gears 34' 5th wheel 10,000 lbs 1750 tounge weight suggestions for power adders,mostly torque jumps.64,000 on truck. rtrapp

Jun 4, 2011 | 08:32 PM

powerstroke72

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From: SW Virginia

I moved your post to its own thread. The other thread was about fuel mileage in a 2011 6.2 V8 truck.

Best of luck and Welcome to FTE.

Jun 5, 2011 | 10:29 AM

bpounds

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From: Whittier, CA

The sad fact is that that is a lot of trailer for a 5.4, and it is always going to struggle on any kind of hills.

There are two significant things you can do. In order of greatest gain;

1. Regear to 4:30. This will make a big difference. Cost about $1,000 for a 2WD. Double that for a 4WD.

2. Talk to 5Star Tuning for a custom tune.

Don't waste your money on CA intakes, exhaust, magnets, chrome gas caps, or hoods.

Jun 5, 2011 | 01:00 PM

jc8825

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From: Fort Worth

Ford only rates a 2008 F250 5.4, 2WD auto, 3.73 for 10K and that is the MAX. It goes down to 9K for CC 4x4. Now, you could go to 4.10 gears and have the max trailer weight jump to the range of 11K-12K depending on truck configuration. Gearing would be about it. You could go to 4.30 and increase your weight limit a bit more.

Jun 5, 2011 | 01:34 PM

p-nut

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Don't waste your time/money on 4.30s. Go with 4.56 gearing. You'll love it. I have 4.88s in my lifted f-350 and it tows like a dream and gained a good chunk of towing mpg too.

Jun 5, 2011 | 05:01 PM

jc8825

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Quote:

Originally Posted by p-nut

Don't waste your time/money on 4.30s. Go with 4.56 gearing. You'll love it. I have 4.88s in my lifted f-350 and it tows like a dream and gained a good chunk of towing mpg too.

4.88s on a V-10. What is your gas mileage?

Jun 6, 2011 | 01:33 AM

p-nut

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Quote:

Originally Posted by jc8825

4.88s on a V-10. What is your gas mileage?

13 unloaded, 8.5 with 11k TT. I'm also running 35" tires and have supporting engine mods.

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Jun 6, 2011 | 09:31 AM

bpounds

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From: Whittier, CA

Quote:

Originally Posted by p-nut

Don't waste your time/money on 4.30s. Go with 4.56 gearing.

This might be correct. It will definitely increase the towing power even more. On a stock truck, you want to be sure you will still have a reasonable RPM unloaded on the interstate. Use the calculators available on FTE and elsewhere to figure out what ratio fits you best.

In the end it is a judgement call, but you want to have the calculations to make a smart choice. A good gear shop can help you decide too.