snowmageddon 2014

[justbecause]

Your last few posts have given me a small glimpse into why exactly you think the 80 is an inferior vehicle.... it's because you don't know shunt about it.

start another thread please. This one is about snow-white.
or better yet. read the newbies guides on Slee's website.

The snow melted how long do you think this thread about something that's gone is going to last?

...via IH8MUD app

 

[Land Speeder]

let the thread die then.

 

[xodeuce]

Nuh uhh. I still got snow in my driveway. This is what it looks like when you slide down the fall line while oriented perpendicular to it, and then save it. I got a kick out of the track shape.

Sent via carrier pigeons to a computer near you using the ih8mud app.

 

[xodeuce]

Sent via carrier pigeons to a computer near you using the ih8mud app.

 

[jemsec]

This has a lot of information and answers regarding the function of the different 4WD operations in 100's.

https://forum.ih8mud.com/100-series-cruisers/787959-uzj100-4x4-4wd-system-explained.html

 

[xodeuce]

This has a lot of information and answers regarding the function of the different 4WD operations in 100's.

https://forum.ih8mud.com/100-series-cruisers/787959-uzj100-4x4-4wd-system-explained.html

Some good stuff in that thread.

Is there a difference between 80 and 100 4 wheel drive system? What about other120 series full time like the 4runners that are full time?

Zack, I'll describe things as directly as I know how.

For the 100 series:

4Hi, CDL Unlocked - Full time ATRAC, Full time ABS. ATRAC engages gradually applying hydraulic pressure to the slipping wheel to gradually transfer power. Eliminates the possibility of the "one wheel peel," but does so gracefully.

4Lo, CDL Unlocked, Full time ATRAC, Full time ABS, ATRAC engages suddenly, providing instant hydraulic force to the slipping wheel to immediately transfer power.

4Lo or 4Hi, CDL Locked, Same ATRAC / ABS performance (instant for Lo, gradual for Hi), but on a "per axle" basis. ATRAC is only concerned with slippage DS to PS, and not F/R, since the CDL is splitting power 50/50 F/R. Easier on your brakes and brake booster.

4Lo, CDL Locked or Unlocked, gear selector in "R", or while transmission is in 1st gear while "2" or "D" and engine speed under 3k RPM - Maximum braking assistance. Adds front wheel descent control if slippage is detected on an incline.

Source:http://www.ezdries.net/Vidpics/ATRAC/LC100 new features.pdf

The difference between a "4x4" and an "AWD" transfer case is that an "AWD" transfer case doesn't have a differential, period. It's just two output shafts driven off of a pre-set gear ratio in the case. The shafts always spin at the same rate.

The center differential in an AWD case allows the F/R shafts to have differing speeds, enabling full time 4WD on high traction surfaces. Without ATRAC or a CDL, a "one wheel peel" would be possible, as you have three differentials in the system.

ATRAC allows you to drive on high traction surfaces, and drastically reduces, if not eliminates, the possibility of a one wheel peel, in 4Hi or 4Lo.

I can tell you, driving the Tacoma and other part time 4x4's in this stuff requires some thought, because if you DO get on pavement, you have to disengage 4x4, and then re-engage once on low traction surfaces. Driving in 4x4, without a center diff, on high traction surfaces, will eventually damage driveline components. I think that's a major win for full time 4x4 with a lockable CDL. For those who have mentioned Subaru, they have an optional feature similar to a Torsen center diff, and they give the user the ability to set the amount of resistance it has, from fully locked to like a 70/30 F/R split. If you drive it in "snow" (locked) mode on pavement, you'll grenade something.

The difference between an 80 and a 100, is that the 80 doesn't have ATRAC, but you can get lockers. On this stuff, I prefer ATRAC, because the lockers can get really squirrelly in a hurry. Off-road where you're going to be actually lifting a tire, I think lockers are preferable. Horses for courses.

In an 80 without 7 pin, the CDL automatically engages in 4Lo, eliminating the ability to drive on high traction surfaces in 4Lo. That's somewhat limiting, so the CDL button adds the ability to make that selectable. However, with the CDL unlocked, in 4Lo, and no lockers, an 80 is fully able to do the "one wheel peel." A 100, unlocked, in the same situation, would have ATRAC to brake the slipping wheel and send power to the drive wheel.

An unlocked 100 vs and unlocked 80 on snow and ice, would probably do better. An unlocked 100 vs a locked 80, the 80 would probably do better assuming the driver was capable of managing the slippage. Unskilled driver, the unlocked 100 is probably going to do better than the locked 80.

 

[bhmmapping]

you are leaving out the fact that the fzj80's have a viscous coupler in the transfer case. In high or low with the cdl unlocked if one tire slips it gradually sends power to the non slipping end proportional to the speed of the slipping tire. It makes for a very smooth, seamless experience on low traction surfaces.

 

[Land Speeder]

you are leaving out the fact that the fzj80's have a viscous coupler in the transfer case. In high or low with the cdl unlocked if one tire slips it gradually sends power to the non slipping end proportional to the speed of the slipping tire. It makes for a very smooth, seamless experience on low traction surfaces.

And you are leaving out that not all 80's actually have a VC. The early ones did not.

 

[bhmmapping]

and you are leaving out the the fact that I specified f"z"j80's - fj80s did not have a VC, correct.

 

[ClankBang]

Nuh uhh. I still got snow in my driveway. This is what it looks like when you slide down the fall line while oriented perpendicular to it, and then save it.

Sent via carrier pigeons to a computer near you using the ih8mud app.

Your Cruiser poops a glowing sphere?

 

[Blackdog]

HAAAA HAAAAA AAAA HAAAAAA....


Poops a glowing sphere!


HAAAAhaaa

 

[justbecause]

you are leaving out the fact that the fzj80's have a viscous coupler in the transfer case. In high or low with the cdl unlocked if one tire slips it gradually sends power to the non slipping end proportional to the speed of the slipping tire. It makes for a very smooth, seamless experience on low traction surfaces.

This is essentially what I was asking about.

Thanks matt.

...via IH8MUD app

 

[xodeuce]

Your Cruiser poops a glowing sphere?

My barista Elf threw that out when I told him I needed a light. I think it runs on fusion.

 

[ClankBang]

So is it going to happen again?
I'm sure we have all heard that we might have a snow storm as early as next week.
I have also heard that there is a chance of one in a couple of weeks (both seem far off to me).

I think I'm gonna load up some extra winter gear today just incase.

I know kieth and I talked about running a transport survice for medical folks and I whish we had that in place last week.
Maybe somthing we should really think about.

 

[justbecause]

So is it going to happen again?
I'm sure we have all heard that we might have a snow storm as early as next week.
I have also heard that there is a chance of one in a couple of weeks (both seem far off to me).

I think I'm gonna load up some extra winter gear today just incase.

I know kieth and I talked about running a transport survice for medical folks and I whish we had that in place last week.
Maybe somthing we should really think about.

We are heading to the thrift store today to pick up the "extra" stuff we need for our 72 hour bags. I dont want to have to pack/unpack it when I need "that jacket" "that pair of pants" "that pair of boots" ETC.

if it isnt a snow storm next week, it will be a wreck and a closed bridge the week after.
if its not that it will be a volcano earthquake april 27 tornado with ***eshima radiation.


something is always about to happen. No harm in having a bag ready, it doesnt have to be a true BOB. some water, flash light, first aid kit, a change of clothes in case you arent dressed for the cold/sun/insert exposure your gym shorts and t-shirt arent adequate for, a couple of power bars and a good pair of hiking shoes should be enough to get you back home if you cant drive there.

ZSC:014 If you're ready for zombies, a hurricane is a breeze!

 

['74 UA FJ]

I don't know how anything could do much better than the full time 80 setup in the snow and ice. Even with the worn out tires I didn't really have any problems. Now the ABS system... I'm not sure how it is supposed to behave but I am not a fan.

My FZJ80 was outstanding. I drove all around Calhoun county Tuesday night, Wednesday and Thursday. Uphill, downhill, didn't matter.

I was very impressed with the ABS system. I was trying it out just to get a feel for how it works. I could get on a patch of ice at 15-20mph, slam on the brakes and not slip a bit. I would get huge feedback through the brake pedal, but no slipping on the ice. I was impressed.

All wheel drive is awesome on ice. These 80s were built for this.

 

['74 UA FJ]

Oh, it only took me 3 hours to get home from work. My normal commute is 25 minutes. My Avalon handled it fine, it was all the idiots/traffic that caused the problem.

 

[justbecause]

VC, VC, VC - get that out of your heads. Here is what a VC does. It determines torque split between the F/R output shafts of an AWD vehicle. It uses a bunch of discs with holes in them spinning in thick fluid that constantly varies the torque split - perhaps from 80/20 to 50/50. Great little device, and it generally replaces the center diffy altogether though there are a few variations.

The device in the 80 is not this device at all. In normal operation, torque is transferred by the steel gears in the 80s traditional 4WD center differential at 50/50. When cornering, this is still the case. So the gears are in conventional use. The device on the 80s center diff merely allows a small amount of rotational speed difference without varying the 50/50 torque split - a key difference.

There was a great discussion and explanation about this device by Norm on 80sCool a few years ago. Norm is one of the Cruiser Gods, and owned a well known shop in Oz.

So, it's definitely NOT a viscous coupling. Can't remember the term to describe it as it's very unusual. I'll think of it.

DougM

Rich,

There is no biasing of torque. It's 50/50 via steel gears at all times. In high range, you're running steel gears, in low range the same - steel gears. Repeat after me - this is NOT a viscous coupling.

DougM

The easiest way to think of it, as has been mentioned before is that it is a limited slip locker for the center diff. You have three systems in parallel, open diff using spider gears, electric central locker and then the VC coupler.

With the VC coupler removed the transfercase is still AWD, but with a complete open diff. Just like a open axle differential. The central diff lock is used just like an axle locker and ensures a 100% lockup and 50/50 power split between front and rear.

Everything I have read seems like the VC is a great thing to have (when it works) because it eliminates the possibility of 1 wheel drive while allowing for slippage when you want it.

Was it only eliminated because it is so infrequently utilized and very expensive?

 

[BMThiker]

FJC's with manual trans have a Torsen (Torque-Sensing) transfer case and are full time 4WD.
This might be the phrase you're looking for (instead of VC).
http://en.wikipedia.org/wiki/Torsen

 

['74 UA FJ]

Idahodoug is a retard. sleeoffroad is right on.