Hey any chance on getting a review on the new GPS you got awhile back? How's it working out for offroad purposes?
Sealed up during the day to keep the dust out, note the new cleaner look sans decals
Nightfall in Amado, AZ
4.88 are most likely be too short for anything under 35. It would not bring benefit of gas consumption. 4.56 may be the better option. Short gears may give you benefits in the city, but would suffer losses on the highway, especially at 4.88 range.
See, I have 315/70-R17 (35"). Use to run stock 3.73s, then switched to 4.56.
I got better respond with 4.56, but did't gain much in consumption; my city mileage increased by about 10%, but highway droped by 5% if not exceed 70mph (80mph has about 20% loss). I do most city, so it's fine with me.
Consider as well that gear swap will get you down for ~$1'200. would it compensate for extra gas you're burning?
Yukon is a good brand. I used to have Nitro, had them failed at 8'000mi (they worn out 70% in 8k), had to fight with Nitro for warranty, but got tired of hitting "brick" wall and got Yukon. Stay away from Nitro. Precision is also good choice. What brand do you have in mind?
Doc,
What size snowpeak table is that?
Do the 4.88 gears help get better gas mileage? thanks
I used to have Nitro, had them failed at 8'000mi (they worn out 70% in 8k), had to fight with Nitro for warranty, but got tired of hitting "brick" wall and got Yukon. Stay away from Nitro. Precision is also good choice. What brand do you have in mind?
The 6 speed has a ratio of .85 in 6th gear.
Using an online calculator I came up with...
@ 75 mph
3.73s:
265/70/16 = 2611 RPM (stock baseline)
285s = 2434 RPM
315s = 2309
4.56s:
265/70/16s = 3192 RPM
285s = 2975 RPM
315s = 2823 RPM
Ideally to get it back to stock RPMs with 35s you'd want about a 4.22 gear ratio, obviously you can really only get 4.10s, 4.56s, and 4.88s and the 4.10s are hard to make work so 4.56s make the most sense. 4.10s would also make a good choice as this would lower your RPMs to about 2538 and probably help improve mileage as the 6th gear could be a bit taller.
The auto's 5th gear at .72 is putting you at 2391 @ 75 mpg with 4.56s or 2520 with 285s.
http://www.ringpinion.com/Calc_RPM.aspx
http://www.snoman.com/HTML/axlecalc_5a.html
http://www.tacomaworld.com/forum/tirecalc.php
5 spd Auto
1st= 3.52
2nd= 2.04
3rd= 1.4
4th= 1.00
5th= 0.72
R= 3.22
6 spd
1st = 4.17
2nd = 2.19
3rd - 1.49
4th = 1.19
5th = 1
6th = .85
r = 3.73
Random tid bit:
T-case 2.57:1
6 spd overall crawl ratio with stock gears = 39.97:1
6 spd with 4.56s = 48.87
auto with stock gears = 33.74
auto with 4.56s = 41.25
75MPH, 6th gear, 4.56s
285s = 2975 RPM
255s = 2954 RPM
vs stock at 75
2611 RPM
Which is still a bit high for cruising...
3000 RPM will eat up your gas though...
That's why in our trucks we get the best mpg right about 65 and 70 or 2263 RPM and 2437 RPM.
4.10s are about the best option for 33s IMO but, they're hard to do.
yes its possible, I'm going to be doing it.... but for the front you need a new carrier for the 4.10's. Either one of the 3.90 FJ cruiser front carriers, or an ARB locker setup for 3.90up gears.
The Toyota 4.10's also wont fit the E-locker 8" rear diff in the TRD Offroad trucks, only the 8.4" rear.