Doc's 05 Tacoma Build Thread

Dave Bennett

Adventurist
Garmin Nuvi 3750 Review

Hey any chance on getting a review on the new GPS you got awhile back? How's it working out for offroad purposes?

First let me say I hated Garmin and their expensive proprietary software (bad experience with my first Garmin GPS) before I bought this one so I was very skeptical right from the get go and mainly bought this one based on Magellan's recent switch from NAVTEQ to TeleAtlas (the mapping software service that TomTom uses). I really like the old NAVTEQ driven Maggellan crossover that I have but it was time to get a newer unit and now Garmin is the only maker with NAVTEQ maps... anyway, here's a quick rundown:

1. Best GPS I've ever used. Easy user interface.
2. Has maps of US, Canada, and Mexico built in. Planning a trip to Panama? No problem, basic worldmap with major highways and such built in. Can scroll across the globe.
3. Off road applicable. For example, it shows every trail in Death Valley to include Mengel Pass and the trail to the Briggs and Stone cabins! Looking for Mikes Sky Rancho? No problem. VERY impressive IMO.
4. Can enter lat/long coords and route to them, turn by turn only works on named/numbered roads.
5. Can pre-load your trips (up to 10 lat/long coord waypoints IIRC) before you leave, and have multiple pre-loaded trips saved in advance.
6. "Where am I" feature gives you instant lat/long, elevation etc.
7. "Bread crumbs" - When this feature is turned on it leaves a green crayon trail behind you showing everywhere you have driven. I've left this on for a few days now, pretty cool feature.
8. Mini SD capability for expanded memory or additional maps (haven't got that far yet).
9. Unit is very thin and light, can mount just about anywhere IMO (not weather proof though), excellent screen and daylight readability.

I give this GPS 4 out of 5 stars
 

Dave Bennett

Adventurist
Haven't really needed to. This thing already shows every trail or road I've ever looked for. Combine it with good maps like a Gazeteer and I'm good to go.

The newer version (3790 IIRC) even shows 3D terrain.
 

ersatzknarf

lost, but making time
Looks great !
Less is indeed more... :sombrero:

Sealed up during the day to keep the dust out, note the new cleaner look sans decals
DSC_03601.jpg

Nightfall in Amado, AZ
DSC_04491.jpg
 

AlexJet

Explorer
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.
 

TacomaZach

New member
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.

Thanks for the info. The reason that I was asking the op about his gears is because I have 255/85's as well and I'm trying to get the best gas mileage I can, and was wondering how his 4.88 gearing does.

What brand of gears would you suggest?
 

AlexJet

Explorer
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?
 

TacomaZach

New member
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?

I'm not in the market for 'em just yet, still researching to see if it's worth it. I've also been hearing that the stock gears in my TRD O.R. tacoma (same as the truck in this build thread) are really crappy and failure can happen at any moment especially while off roading. So I want good quality gears that can take a beating and are more suited for my tire size.
 

Dave Bennett

Adventurist
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?

I've had Nitro gears on for a couple years now without issue. Mine were set up by East Coast Gear Supply, having a great shop set up gears is key IMO.
 
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maxama10

Welcome to Nevadafornia
I did a little research into gears myself as I just switched to 35s on my Tacoma.

I calculated RPMs of different gears at 75MPH (standard hwy speed limit out here) and different tire sizes.

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.

You'll basically have to translate how this will affect gas mileage but... RPMS correlate with MPG pretty solidly I believe.


Edit:

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.

Also most of the problem locked rear ends are from 05 trucks.
 
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