Regearing for 33s. 4.30 vs. 4.56

Plenty of hills going through Kentucky and Tennessee. No real "mountains" but certainly some good elevation change. With a trailer on the back, the truck hit 4th plenty of times (actually, I did it manually more often than not). However, 4k+ would be 3rd gear which is excessive. Only way I could see you needing that type of power band would be mountains at fairly high elevation. In Colorado, at 7,000+ft the truck definitely has a hard time. However, that's not due to the gearing, that's due to the lack of air. And a supercharger would DEFINITELY be THE solution to that problem. I've been contemplating that myself.

 

justinf307 I drove my 2015 V6 DCSB for right around two years with 35x12.50x17 super swampers with the factory 3.73 gears. I recently installed 4.56 gears in it. It's perfect. However, for 33s i suggest going with 4.30 rather than 4.56

 

I probably would have gone 4.30 if it was available when I regeared. It's probably the best ratio for 33/34" tires. I'm happy I went with 4.56 though because I suspect I MIGHT end up with larger tires in the future.

 

Like I said, relatively flat. The hills of western Kentucky and Tennessee aren't much to write home about.

 

With stock gearing and 265/75 I am sometimes wound out in 2nd gear (+5,000 rpm) pulling my trailer in the Sierra Nevada Mtns. Climbing from 1,000ft or less in elevation to 4,500ft at the most is very different than going from 4,500ft to over 6,000ft.

 

This

I'm from Ohio. I've been through Tennessee and Kentucky (and all over WV). I live in Montana. Not any similarity whatsoever.

 

What elevation?

I live at 5,000 feet. Most everywhere I go to play is "uphill" from here. (7k - 9k feet)

As also, if you have larger tires you will be at a LOWER RPM.

Just a example:
Helena, MT is 3,875ft.
Bozeman, MT is 4,820ft.
Butte, MT is 5,538ft.

Helena to Bozeman is a 1,000 for incline. We call that drive "flat". It's roughly 90 miles.

Going from Butte to Bozeman is roughly a drop of 800 feet. Except you go over a pass that peaks at 6,329 feet. And that pass is a really steep climb RIGHT outside of Butte Straight up, straight down.

So you climb 800 feet. Then you head down 1,600 down to Bozeman. The whole pass is like 4 to 5 miles long?

 

Thanks, I take it the 4:10 carrier will fit 4:56 gears then, it off around 3:9x

 

Hopefully you found that they have two different cuts depending on your carrier. Also from your comment you have the 4 cylinder 4x4 with the 4.10 gearing. Anyone who orders the gears should have been able to see the difference in the sets.
I am going 4.56 on my truck as with the weight and later options I will be running 34-35s year round

 

Im thinking about re gearing....I drive a 2011 Tacoma 4.0L 4x4 Automatic with 33's E rated tires, looking at re gearing to 4:56. Do they make 4:30 gearing for 2nd gen Tacomas?

NOTE: I drive with a snug top shell with recovery gear, hi-lift, tool bag, etc.... truck is heavy. Should I go 4:30 or 4:56?

 

Yes, they make a 4.30 for the front and rear. However, if you're typically loaded up a bit I'd recommend going with 4.56 gears. I run a 34" tire (really more like a 33.5") with no shell or gear (normally) and I run 4.56 gears. I think it's perfect.

 

I know a lot of people are looking into regearing to 4.10 Is that for a Tacoma with very little to no cargo weight? (Example: camper shell, recovery gear, tools, power tank, etc....) 4.10 seems hardly any change from 3.73. I guess it’s ok if you pack super light.

I carry what I mentioned above and then some when I Off Road, I’m going to switch from 32s to 33s pretty soon and definitely going to regear. I’m looking at 4.56. What’s your thoughts on this?

Should I go 4.30 or 4.56?

 

I would say 4.30 unless you never go over 60mph because you have the auto. It compensates already to help you so you would be throwing away fuel imo

The stock system is geared on the lowest of the economy spec sheet. I don't follow the sheet as much as I just try and bring it as close to what the truck was designed for.

The manual transmission is geared to run about 350 to 400 rpm higher. So by gearing to 4:10 they are changing how they use their gears and should get a little better mileage while having a more manageable first gear.

With the auto I would pick 4:30 unless you plan a possible 35" tire in the future. Even then the 4.30 will still be awesome in comparison to what you have now.

 

Bumping and sort of old thread instead of starting a new one...I just got my first 2nd gen, I've only owned 1st gens up to now. If I wanted to go to 4.10 gears, I'm reading that you can use the diffs out of a 4cyl 2nd gen, but what about the rear diffs from a 1st gen? I know the front clam-shells are different, are they the same 3rd member used in the rear end?

 

I have 4.56 in an auto and its fine. RPMs are not too bad, 2500 give or take at 70mpg for reference. I would have gone 4.88 but until I go up to a 35 it would be overkill for 285's.

My other buddy did 4.3 on 35's with a manual and loves it. 4.56 would be more pep for the 35's off road.

285s and stock gearing in an auto was trash, I was constantly downshifting on hills. Now you can still feel it pulling, although not crazy its not as sluggish and I have a ton of 1/4 plate steel on my rig.

 

4.0 auto w/ 285’s .. 4.30’s probably one of the best things I’ve done to the truck. 2650 rpm at 80mph.. truck now feels as if it’s being pushed , not like it’s dragging heavy tires. Also feels like it needs less throttle to maintain freeway speeds.

 

I loved 4.56 with 2.85’s

 

I’m 4.56 with 255/85r16. Feels like stock but a little lower geared.

 

I ended up going with 4.56 (auto trans) and 285/75/16. It's definitely much peppier than it was stock. RPM are about 2600 at 75mph.
I actually ran the 4.56 for a couple months with 265's as well, felt really good too

 

Is ur truck outfitted with a bunch of weight or mostly stock?