Regearing and Low range

Question about regearing, I am running 285's w/Auto trans and stock gearing.

My 4lo range simply is to high, I am curious exactly how much of a difference I will see in low range with the new 4.56. I would love to go FJ Case/Crawler but its not in the budget right now. Looking for an interm solution to help, and maybe pickup some power/mpg along the way.

Thoughts?

 

Good morning bump

 

Is your truck 4 cyl or V6? If it's 4 cyl it will have 4.10s and if it's a V6 it'll have 3.73s.
The Tacoma transfer case has a low ratio of 2.57 regardless of powertrain.
So, if you have a V6 your effective ratio is (3.73X2.57=) 9.59:1.
4 cyl (4.10X2.57=) 10.51. A 4.56 swap will increase it to 11.72.
Doing this swap likely won't improve milage because the engine will run at a higher rpm on the highway, but the truck will be quicker around town

 

V6. Mpg isnt that much of a concern as is lower gear ratio in low range. I just dont know how signifigant that jump to 4.56 will feel in 4lo

 

ive never heard of someone with an auto and 4.0 with only 285s say the low range isnt low enough? its an auto, its low enough to do alot of stupid stuff

 

Crawl down steep slickrock trails in Moab and you will change your mind in a hurry. My brakes are working way to hard and last year on Hells Revenge I experienced scary brake fade.

Going up is fine, coming down is not lol

 

its going to change just as much as you regear the diffs.

whats so special bout the fj case? lower low range?

 

Yes,I understand that. I just dont know how signifigant of a difference it will make.

FJ Case is lever actuated instead of electronic.

 

yeah i knew it was manual instead of electronic... but whats the point if it offers no more gearing?

Regearing to 4.56's would bring your crawl speed down slower than stock 265/70/16 w/ 3.73's

With 285/75/16 to have the same crawl speed as stock your looking at a 4.00 diff gears to account for the 7.3% difference in tire size. Id say if your looking to stick wth 285/75/16 go with a 4.10

 

K, maybe im not being clear enough. If I were going to install a Marlin Crawler, I would put in an FJ case at the same time. Not to change ratios, but to eliminate the crappy electronic actuator on the stock Tacoma TC. I dont plan on swapping the TC if I am just regearing.

I know how the math works. I dont want to spend $2k on 4.10s so I can be close to stock, I want IMPROVEMENT while maintaining some highway milage (ie 4.88s are probably to low with 285s)

<b>I am looking for a Real World Experience, from somone who HAS 4.56s WITH 285s. How did this combination improve YOUR wheeling experience? </b>

 

If you know how the math works what's the point in this thread!?

You know it will be an improvement in 4lo.

 

Knowing the math is different from knowing how it feels.

 

Thank you, I agree.

The point of this thread was I was hoping for input like

"I have 4.56 and they are amazing offroad, you will love them"

or

"I have 4.56 and they helped with my power on the road, but save your money if you are expecting much more offroad"

 

if you want a lower low range don't even bother with regearing and go straight to a crawl box with 4.7 gearset. if your sticking with 33's and you have a v6 regearing doesn't make any sense unless you were putting lockers in at the same time.

 

Fj case is supposed to be stronger also. This thread compares the two.

http://www.tacomaworld.com/forum/2nd-gen-tacomas/131275-inside-05-tacoma-t-case.html

I was also wandering about a gear change. I run 33's and would like to get a slower crawl speed to keep the rig slow down the steep stuff. Many that run 35's have done so but I'm not sure what ratio they are using. Based on the numbers above the 4.10 might be good for me as I want to keep rpms low at freeway speeds. If crawling is your primary concern the 4.56 might be the ticket.

 

i have 4.88's and 35's, i would still buy a crawl box if i had the cash. regearing doesn't make enough of a difference to even make it noticeable in 4low.

 

The 4 cylinder 4wd already have a 4.10 ratio, so no need to re-gear if you are going to put in 33-35 tires plus a 6 inch lift?

 

Even for 33's I would regear a 4 cyl truck, they are already low on power for the weight and 33's will really suck the power and torque.

 

Is the 4.10 ratio not enough for the 4 cylinder with 33's? Ideally, what would be a ratio for it?

 

4.56 or 4.88 if you plan on eventually going to 35's. You could probably live with stock gears and 33's if you had a manual tranny though.