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Thread: Axle Rebuild, 4.56 regear, outfitter design front axle bushing.

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    Axle Rebuild, 4.56 regear, outfitter design front axle bushing.

    My truck is fresh off having 4.56 gearing installed from ECGS, it drives like a dream. Effortless acceleration with my 37”s (essentially 36”s) smooth shifts, and power without downshifting. I have to say I’m in love all over again. Of course I’m still in break in phase so I’m being gentle on the throttle - none the less it pulls without much encouragement. There is a little bit of gear noise, almost sounds like mud terrains, hopefully that goes away with break in.

    The first question half of you will ask is “Why not 4.88s”, well simple. First I never plan to go over 37s, the extra half inch of clearance with 38s isn’t worth the cost difference for my purposes, and I dislike how our trucks look with the lift kits when you go over 38s. Secondly, I drive a lot of highway 80-85 MPH, I didn’t want my truck running 2600-2800 RPM for hours at a time. Third the fuel economy increase is very nice.

    Imagine a Graph with a hump for 37s inch tires on our truck in regards to fuel economy. You have no power with 4.10s and lots of power with 4.88s and both are going to get essentially the same fuel economy. The 4.56s are going to give you more power than stock and bring up your fuel economy to at least stock.

    Take it with a grain of salt because I was driving gently, but I was also in heavy stop and go traffic, but my average fuel economy returning home was 3MPG higher than normal. Again ‘Heavy Stop and Go’ but also ‘Driving Gently’. I’m not going to make a final say on that front just yet but preliminary results are promising. The few long stretches of road I did have were averaging 15–17MPG. Averaging for a DIC total of 13.5MPG on the whole trip, including stopping for 20 minutes.

    Outfitter bushing kit: the installer was reasonably apprehensive about installing the bushings, or more over removing the old bushings. Fortunately he did go ahead and get them changed out for me. The difference is noticeable, the entire truck feels more solid, clunks that I had gotten used to are gone and it’s actually throwing me off not hearing them.

    I’m excited to get more time behind the wheel once the monsoon ends.

    I am very happy, upcoming changes will be a redhead steering box, a couple small front end items, and a tune.
    Last edited by iwillnc; 05-20-2020 at 07:44 PM.

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    Re: Axle Rebuild, 4.56 regear, outfitter design front axle bushing.


    Sorry buddy, unless you got into your BCM computer and calibrated for the change in tire size AND gear change your DIC is incorrect.
    37s and 4.56s will "trick" the computer and will NOT give you any kind of accurate information.
    Only way to truly know your mileage is to hand calculate the actual miles driven (not the odometer which is off) and then the actual fuel used.
    Hope you did the hand calculations before the regear or it's all for naught.
    "I'd rather be lost on Drummond Island than found on the Mainland!"
    Previously owned: Mr. Black H3 Alpha OffRoad, Mr. Orange 08 H3 Alpha, Mr. Blue 08 H3 Alpha OffRoad, Mr. "T" 09 H3T Adventure 5 speed, XXLH3 10 H3 Alpha OffRoad

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    Re: Axle Rebuild, 4.56 regear, outfitter design front axle bushing.

    Oh I am well aware on that front, it’s all relative anyway. At 60MPH GPS shows my speedometer is off 5 and at 80 my speedometer is off 7.

    I didn’t do it for the MPGs but engine is not straining to move the truck, light blips of the acceleration actually hold or increase speed which it didn’t before, and the truck actually spends significantly more time coasting with throttle blips than the constant struggle to keep up to speed.

    I have no doubt that everything is happier.
    Last edited by iwillnc; 05-22-2020 at 11:32 AM.

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