4.10's or 4.56's
#1
4.10's or 4.56's
I have been unable to decide whether to regear to a 4.10 ratio or a 4.56 ratio. I have a 03 5.4L 4WD, so 4.30's are out of the question. I know I need an 8.8 ring and pinion in a reverse cut for the front, and a 9.75 for the rear. However, I am unsure which ratio to choose. I have 35'' all-terrain tires on my truck that weigh ~65 lbs apiece.
I realize that 4.10's would get me back to a realized ratio of 3.73, and the 4.56's to a realized 4.30 or so. I have 3.55's in there now. I am not really regearing for power recovery, as I really did not lose much w/ the bigger tires, as I have the 5.4L and several bolt ons, so I am not lacking in the power dept. I am regearing primarily to protect the transmission. The truck is also a pavement queen mostly, and I could always use 4 Lo offroad I need more torque.
Does anyone have 4.10's w/ 35's? I realize that the general guideline is 4.56's, however, I am not looking to kill my top end by going too low, as I drive on the highway everyday.
Anyone w/ 35's and 4.10's please describe driving style, mileage, etc. The same goes for 4.56's. I'd prefer input from those w/ the 5.4L, 4WD, and auto, but anyone's input is welcome.
I realize that 4.10's would get me back to a realized ratio of 3.73, and the 4.56's to a realized 4.30 or so. I have 3.55's in there now. I am not really regearing for power recovery, as I really did not lose much w/ the bigger tires, as I have the 5.4L and several bolt ons, so I am not lacking in the power dept. I am regearing primarily to protect the transmission. The truck is also a pavement queen mostly, and I could always use 4 Lo offroad I need more torque.
Does anyone have 4.10's w/ 35's? I realize that the general guideline is 4.56's, however, I am not looking to kill my top end by going too low, as I drive on the highway everyday.
Anyone w/ 35's and 4.10's please describe driving style, mileage, etc. The same goes for 4.56's. I'd prefer input from those w/ the 5.4L, 4WD, and auto, but anyone's input is welcome.
#2
#3
ive given him a hard time on this before. He doesnt want to loose his highway MPG which unless he's going over 70 he should be fine, with 4.56's.
4.10's would work but its really not worth it to me to spend the money on 4.10's
Jon i know you will want to go bigger! I just know. Get 4.56's that way if you do decide to go to 37's or 38's you will be ok, even though 4.88's would be perferred!
4.10's would work but its really not worth it to me to spend the money on 4.10's
Jon i know you will want to go bigger! I just know. Get 4.56's that way if you do decide to go to 37's or 38's you will be ok, even though 4.88's would be perferred!
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#6
I don't know why it wouldn't work. what you have it now? Gear ratio?
#7
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#12
Now I run at about 2500-2600 at those speeds with 4:88s.
Jyst FYI for comparison.
#13
i'm interested in the difference too since i'll be in the same boat as minimonster here in a few weeks, except i have 4.6 and 3.55s. i could be wrong since i dont know a whole lot in the way of gears but, if hes doing mostly highway driving and he gets larger gears (4.56 or 4.88), wouldnt that put him at higher RPMs, and therefore...less mpg?
I do more in town driving, but i was leaning more to 4.10 gears too anyways since i don't do a whole lot offroading, just when i go hunting fishing camping and stuff, and that would bring me back to stock...but with this talk i may reconsider 4.56s. good thing i wont be able to get them for nearly a year, this could be a tough descision!
Cody
I do more in town driving, but i was leaning more to 4.10 gears too anyways since i don't do a whole lot offroading, just when i go hunting fishing camping and stuff, and that would bring me back to stock...but with this talk i may reconsider 4.56s. good thing i wont be able to get them for nearly a year, this could be a tough descision!
Cody
#14
i'm interested in the difference too since i'll be in the same boat as minimonster here in a few weeks, except i have 4.6 and 3.55s. i could be wrong since i dont know a whole lot in the way of gears but, if hes doing mostly highway driving and he gets larger gears (4.56 or 4.88), wouldnt that put him at higher RPMs, and therefore...less mpg?
Your engine is nt working as hard with the numerically higher gears.
Imagine pedaling your bike up a steep hill.
In a tall gear, you aren't pedaling as fast, but it's REALLY hard work.
Now put your bike in a lower gear. You're pedaling faster, but it's easier.
#15
Now it never downshifts and usually the torque converter will stay locked the whole time even with the cruise on.
Some people on here say that even gears that are too short won't hurt your MPG too much because these motors don't use much more gas at 2000 rpm than at 3000 rpms. I don't know though.
and others say that low gears help in the city but hurt some on the hwy.
All I know is that 12.5 with a 5.4 with 35's is not bad.
and it drives a crapload better than it did with the 3:73's