Tell me about re-gearing my 5th gen
As I'm working on things to do to my 4runner (bumpers, lift, 285s), I'm starting to come across the subject of "re-gearing" a lot more. It came up recently during a class I took for learning more about off road driving. It was recommended that for a trail like the Rubicon that you have at least a 55 crawl ratio as calculated at 4lo.com
I was playing around with the calculator a little bit and starting to understand why people go from 3.73 to 4.56 or 4.88 or even 5.29. My questions are probably somewhat basic, is this something people do to their daily driver rigs? Once you're into re-gearing are you pretty much relegating the use of your rig to off road driving or is it still suitable to slog through bay area commute traffic at 15 mph? Can I still go 65mph on the highway without relative pain? I'm sure gas mileage suffers just wondering if it's still bearable for daily driving use. Also, how does re-gearing affect things like the factory locker, traction control, the speedometer and how do people work around or with these factors? Thank you for any help, as always, greatly appreciated (i did search the 5th gen forums for re-gearing and found about 3 threads which I did skim through but, they seemed centered more about someone who already made up their mind to re-gear and just wondering what they should re-gear to). |
Re-gearing to 4.56 was one of the best things I have done to my rig. You can see in my signature everything else I've done.
This is my daily driver. I wouldn't go deeper than 4.56 if you intend to also drive it daily on the street. You will immediately notice more pep in city driving with a slight boost in MPG to boot. 65 mph on the highway is slow in my part of the world and you won't notice any degradation in highway performance at that speed, except that your cruise control will work much better without dropping one or two gears at the slightest hill and then overspeeding before settling back down. I cruise at 75 mph with no issues other than a slight drop in mpg, but it makes up for it by being much more responsive. I say all this with 33 inch tires in mind. I plan to go to 34's later this year (285/75), which I probably won't notice a difference in city driving but will gain some legs on the highway. If you are planning to make your rig strictly a trail rig then 4.88 would be appropriate, but I don't see that working too well on the street. In stock trim I feel the truck is geared too high and would work better with 3.90 of 4.10 gears. With 4.56 gears and 33 inch tires it feels more like it was intended if Toyota wasn't so occupied with mpg. In addition, the transmission shift points now seem to be much better integrated to the overall performance of the vehicle. Bottom line, if you go to 33 inch tires, lift and some armor (bumper, skids, sliders, winch, etc.) 4.56 gears are appropriate and will give you better performance than stock. |
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How did it affect your factory locker or traction control (if it did)? Were you able to keep it or did you have to throw it out and get air locker? |
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What wfo9 said. No effect whatsoever on locker, speedo or ATRAC. |
Silly question but i have to ask for clarity. When one regears their rig, are they regearing all 3 differentials (Front, transfercase, and rear), only the front and rear, or only the rear?
Where can the gears be found, who can perform the service, and how much is someone looking at for the whole process? *Crawls back underneath rock* |
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Nitto makes the gears or Toyota( only offered in 4.56 and going to be $$$). East Coast Gear supply is a reputable shop where you can see pricing for just the parts or completed thirds and front clamshells to do the swap yourself. A lot of folks go ahead and add an ARB front Air locker while they are at it which adds cost (~$800-1000) + compressor cost IMHO if you have to ask 4.56 is likely the right choice and 4.88 you need to understand what you are getting if you go that route (not directed at you, just a general statement) |
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There is a low range reduction gear in the transfer case... but there is currently no option to run a higher reduction gear. I really wish there was...... I don't think there is enough room... Cost is going to vary greatly based on who does the install. The ring and pinions are not that much 500-750... but it typically gets up pretty high 1500+ with labor. |
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Any hesitation to lock the front as the CV axles are exposed and would be prone to break? I would lock a straight axle if, for some reason, it wasn't already. Just a little skeptical on locking IFS... |
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I wouldn't add a locker to the front, quickest way to have a catastrophic failure on the trails. Too much for IFS. Sent from my iPhone using Tapatalk |
It would be interesting if Gear Vendors developed an under/overdrive setup for the 4Runner. Then you could go to a 4.88:1 with an overdrive or use an under drive for off-road only.
https://www.gearvendors.com/4x4.html |
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cheers, willie |
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4.56 gears are my favorite mod. |
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Now... you can put more stress with a locker, since one wheel can take all the torque... and you can clearly bind things up. And if you don't know what you are doing...bad things can happen. It takes some skill and practice to know how and when to use it.. I just totally disagree that it is too much for IFS. I'm mostly silky smooth with mine now, but I have screwed up with it a few times and it held up fine. |
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No doubt wild driving will lead to CV failures. Your description is spot on. I'm maintaining my opinion that locking the front is asking for trouble, but you make some good points. Sent from my iPhone using Tapatalk |
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