4.56 GEARS???? - Ford Powerstroke Diesel Forum
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post #1 of 11 Old 04-20-2010, 05:31 PM Thread Starter
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4.56 GEARS????

I am thinking about putting 4.56 gears in the front and rear of my truck with a good locker for rear. Its 2000 with some mods and a aod.I will be running 37 inch tires . I know the i will be turning more rpm. Is any one running this set up and what have you got out of this gear swap thanks
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post #2 of 11 Old 04-20-2010, 05:45 PM
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That is a ton of gear. It's not a gasser. 4:10s would be enough, alot of guys run 3.73s with 37's.
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post #3 of 11 Old 04-20-2010, 05:51 PM
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I was wondering the same thing, I have the stock 3.73's with 37's and a little more gear would be nice. However the jump to 4.10's is not enough to justify the cost.
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post #4 of 11 Old 04-20-2010, 05:59 PM
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post #5 of 11 Old 04-20-2010, 06:13 PM
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Quote:
Originally Posted by EMMAS POWER STROKE View Post
I am thinking about putting 4.56 gears in the front and rear of my truck with a good locker for rear. Its 2000 with some mods and a aod.I will be running 37 inch tires . I know the i will be turning more rpm. Is any one running this set up and what have you got out of this gear swap thanks
What percent of the time do you tow? How much weight do you tow?

2000 F250 Lariat, CC, Long Bed PSD, 4x4, Manual, 102K Miles 4.30 gears, Truspeed
Performance Mods: Tuned by PHP, Wicked Wheel, Gauges, AIH Delete, 5" straight exhaust, DIY Intake
Suspension: 8" Fabtech all spring lift, Fabtech Dual Front shock mounts, Fabtech Dual steering stabilizer, 17" ATX Vice, 37" Toyo M/T


1995 RC F350 Longbed 4x4, Manual, 310K miles, Downpipe, cat delete, FPR shim. (Farm Truck)
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post #6 of 11 Old 04-21-2010, 04:44 AM Thread Starter
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I do some towing i have a 28 foot flatbed, maybe up to 12,000 pounds . I was told it could help egts
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post #7 of 11 Old 04-22-2010, 08:35 AM
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3:55's with 35"s. I have no issues and some of the local pullers run that setup.

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post #8 of 11 Old 04-22-2010, 08:43 AM
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If you drive on the highway alot you are not going to like 4.56's. Some guys don't even like the 4.30's...

I would stick the tires on it and see how you like it before I did gears.

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You will get some axle wrap with a heavy trailer, I can feel it when towing my gooseneck with some heavy equipment. My Deavers will wrap enough to make the tires rub the front of the rear fender well if I give it too much throttle on aceleration.
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post #9 of 11 Old 04-22-2010, 08:56 AM
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Quote:
Originally Posted by EMMAS POWER STROKE View Post
I do some towing i have a 28 foot flatbed, maybe up to 12,000 pounds . I was told it could help egts
For that much weight I would do 4.56.

2000 F250 Lariat, CC, Long Bed PSD, 4x4, Manual, 102K Miles 4.30 gears, Truspeed
Performance Mods: Tuned by PHP, Wicked Wheel, Gauges, AIH Delete, 5" straight exhaust, DIY Intake
Suspension: 8" Fabtech all spring lift, Fabtech Dual Front shock mounts, Fabtech Dual steering stabilizer, 17" ATX Vice, 37" Toyo M/T


1995 RC F350 Longbed 4x4, Manual, 310K miles, Downpipe, cat delete, FPR shim. (Farm Truck)
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post #10 of 11 Old 04-22-2010, 09:33 AM
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01 Excursion w 7.3 running 37's w 4.30 gears were a little tall, if I did it over again it would be 4.10's and we towed alot.
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