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Post by lakemarykid on Nov 12, 2005 22:11:05 GMT -5
Ok, i just tried searching but no luck. Im curious as to what all the kind of differentials do/are. What is an open diff, what is a ls diff and so. Also what is it that a stock tacoma comes with(the lever to the right and below the steering wheel). Thanks in advance. Also any ideas on what to search for to just learn basics about the taco??
PS: just curious, but how is the saftey of the toyota in accidents and such.
Thanks in advance, The Kid aKa Curtis
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Post by 94cnytoy on Nov 13, 2005 6:20:24 GMT -5
Here's some help with the differentials.
Open Diff.
Most common on all axles. One axle shaft will always be able to rotate faster or slower than the other. The driving force will take the path of least resistance.
Example: One tire on pavement, on tire in mud. The tire in the mud(least traction) will spin or dig until traction is found(or not found). OR 100% of the available power will go to the path of least resistance, while the tire with 100% traction, will set there idle, waiting for the other wheel to move. Also open has the least amount of steering pull and tire wear(one wheel allowed to turn at different speeds at all times).
Limited Slips.
This is the most common factory available traction aid.
LS's are an actual differential assy that, depending on type, will put a biased amount of power to a traction-less axle.
Example:
One wheel on pavement, one wheel in mud. This time the wheel in the mud will still spin (80% of available power), but now the wheel on the pavement recieves the 20% balance of power. This wheel may now drive the vehicle out of the situation. BUT notices, only 20% of the available power is there to use!.
LS's are typically factory options for rear axles.
They do cause slight tire wear beyond normal/open diffs
LS's are typically built on a clutch type system and do wear with time/use and require special fluids to lubricate.
Lockers(Detroit,Aussie,etc)
These are 100% non reversable lockers. By that I mean, when engaged and working, one wheel may never turn slower than the other. Only faster. As long as the differential is turning, so are both wheels.
Max traction! BUT can be cumbersome on the pavement.
There is no on/off switch, just the gas peddle. The like to push the vehicle straight ahead, reguardless of where the steering tires are pointing. Moderate to heavy tire wear
Spool/Arbs/Ox
These units lock the axles together 100% (similar to your Atv axle) There is no differential anymore. As with full lockers, 100% traction or power to both wheels at all times. THE MAIN DIFFERENCE HERE is the Arb and Ox may be disengaged. This then changes these axles back to open diff's for street driving, turning or when 100% traction is not required. The Toyota factory rear lockers work the same way. Open or 100% at the flip of a switch.
Hope I at least got you in the right direction. I tried to shorten this up a little.
Now, pick one and the application, then re-post your concerns. More than likely, anything you want to do, someone here has done it and can offer great advice.
Thanks,Good luck and Welcome to the site!
Stew
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Post by lakemarykid on Nov 13, 2005 6:58:05 GMT -5
  Man Stew, thanks A TON. That is the exact response i needed. I just wanted to know what each kind was and their performance. So a stock toyota comes with an open differential in the rear, but when needed, you can engage it to a locker? Are they go performance wise? or are they cheap? Thanks again man! Curtis
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Post by 94cnytoy on Nov 13, 2005 7:07:45 GMT -5
Slow down there.....
A stock or open Diff can not be "engaged" to a locker.
An open diff can have a "drop in" locker added. These are like the Aussie or lockrights. They fit in the factory differential case.
A Toy with the factory rear locker option, can be "engaged"
Or, you can have new Arb's installed(replacing the stock diff assy) to allow you to lock or unlock.
Also FYI, the Aussie's are the cheapest. Arb's the most expensive.
Stew
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Post by lakemarykid on Nov 13, 2005 9:15:56 GMT -5
ok now i gotcha, will the stocker last? Or should you go ahead and upgrade?
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Post by 94cnytoy on Nov 13, 2005 9:23:15 GMT -5
Are you refering to the stock open diff left open?
The stock open diff with a Aussie or Lockright added?
A stock LS?
A stock electric locker?
If the stock open diff is in good shape, a drop in Ausie or ? will be ok. with the existing gears and bearings.
If the stock housing and internals are worn, it will fail and not operate properly.
If you go with a detriot locker or Arb, all the internals are typeically replaced during the install.
Stew
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Post by lakemarykid on Nov 13, 2005 9:29:21 GMT -5
Sorry for being so vague, new to all this.  The stock rear locker option is what i was referring to. I am going to be looking at a 96+ Taco. Do you have AIM? |
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Post by 94cnytoy on Nov 13, 2005 13:53:22 GMT -5
If you are lucky and find a factory electric rear locker. They are cool as hell. I believe in factory set-up, they last great, but can only be engaged on low range.
IF it just has an open rear diff,They last quite well. Performance and traction is the neccessity. Stock opens seems to last forever. the interior parts of the open carriers(spider gears), which are what allows the axles to rotate independantly, are usually only damaged by lack of lubrication, or repeated heavy(fast) tire spinning then grabbing extreme traction(this "shocks" the gears causing wear and possible stress fractures).
There's no need to replace the open diff's unless
1) You are changing the axle gears and have it apart anyway, so spend the money and GET a locker in there)
2) You need a locker, reguardless of the axle gearing.
If I could go back in time a little, I'd still have my old 31's on my truck, no body lift, but I'd have a rear locker.
My advice to you, find a friend or family member with another truck(to pull you out or/and safety) and take the truck wheeling first and see what you like. An experienced driver can get any vehicle further up(or down) a trail with less breakage and less "add-ons".
Go out, have fun and try to see what you "need" VS. what you "want". Theres a big difference.
By the way, sorry but I don't do the internet "chat" thing. This is very rare for me to reply this often and this fast.....even with my big mouth and big opinions.
Stew
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Post by lakemarykid on Nov 13, 2005 15:35:48 GMT -5
Lol well i feel honored to get this much attention from you then. ;D  You have pretty much hit the nail on the head brother! I think you have answered any possible question there is on this subject. Now for another question, how hard is it to change your own gears? Say i want some 33's and i wanna put in some 4:88's, would that be a DIY job with the specialty tools? Also what are your opinions on something like the AUSSIE or ARB drop in? |
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Post by 94cnytoy on Nov 14, 2005 5:12:46 GMT -5
Do you personally know any mechanics?
Differential/gears require special tool and precision down to .001th of an inch.(thousandths)
If you've got good mechanical experience, the proper tools and the ambition, by all means go ahead and do it.
I myself wouldn't. Only because my trucks my Daily Driver and if there is any problems, I can't get to work without her.
If you are not changing the gears, the aussie is a good choice. You do have to pull the diff apart, but you aren't resetting the gears.
The ARB is a full unit, so if installing, you might as well regear. I prefer the ARB because it has an on/off switch.
PS: After this thread is done, try to start all new threads in the respective webpage sections. Example: Toy Tech/Tacomas, or Reviews/Lockers / Gears.
This way you will get a wider array of responses. While you say I'm helping you, there are others out there with different opinions and better/more experience.
We are a team here and all work together, eventually.
Stew
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Post by jcdillon on Feb 7, 2008 22:40:14 GMT -5
I have an Inoneisan verison of the FJ40 3spd. What's the spline size , piniongear size & ratio??? I have 31"s on it now & plan to go to 33"s, It ses 20% off road What ratio do you recomend  ?? |
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Post by fourwd1 on Feb 8, 2008 12:25:56 GMT -5
I have an Inoneisan verison of the FJ40 3spd. What's the spline size , piniongear size & ratio??? I have 31"s on it now & plan to go to 33"s, It ses 20% off road What ratio do you recomend ?? What year ? Rear axle is 30 spline, 9.5" ring gear. Front could be 9.5" or 8" rev rotation (Approx 1990 on) Stock ratios are 3.73 (30) 4.10 (29) 4.11 (08) 4.30 (28) 4.56 (25) 4.88 (14) most common are 3.73 or 4.10/11 8.5 " R&P (G) 9" R&P (K) axle code (found on VIN plate on firewall) can be decoded use above info, format is: letter, number, number, number where letter is R&P size (above) first two numbers are ratio (in brackets ( ) after ratios above) third number is open diff (2), LSD (3) or (5), locker (4) |
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Post by fourwd1 on Feb 8, 2008 12:26:47 GMT -5
Oh yeah, you'd want 4.88's for 33's.
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Man Stew, thanks A TON. That is the exact response i needed. I just wanted to know what each kind was and their performance. So a stock toyota comes with an open differential in the rear, but when needed, you can engage it to a locker? Are they go performance wise? or are they cheap?
??
