alright, i could buy into that. electronics inside the t-case to send power to lock the spools in the diffs i guess.
Ummm… there’s no cheap feel here. Very nice all around.
You guys suck.
4hi is part time 4wd… doesn’t kick in until traction is lost. You can drive anywhere at any speed in 4hi and unless you lose traction the front tires will never engage.
4lo - is locked in 4wd …
2hi - is for playing in the snow. You don’t have to worry about the 4wd kicking in during a drift… and these things really drift nicely, ask SilverGTP…
It is a cheap feel. Sit in a SUV that costs more than 30k new and then you will understand.
I’ve taken turns pretty quick in Maria’s, its not tippy at all… just don’t be a dumbass.
4wd will help you turn and stop better than 2wd.
AWD will do it even better.
When you apply the brakes in a 2wd, ~70% of the braking force is applied to the front wheels. If your drive wheels are in the back, they will continue to push the vehicle. If your drive wheels are in the front, and you apply the brakes, you will skid (with no ABS) and you will not be able to turn. In AWD/4WD you can downshift, or remove your foot from the gas, the front and back tires will turn at the same speed giving you more control. During braking, all 4 tires will be slowed at the same speeds… again, allowing you to control the vehicle much better. My truck, is 2wd… when I apply the brakes on ice/snow, the rear tires continue to push me, and the front tires lock up. This isn’t fun when your actually trying to stop. You have no control. Either release the brake so you can turn… but then your not stopping, or stay on the brakes and and hope you stop in time and don’t have to swerve.
I’m probably over stating the obvious for some… but there is a reason the VR4 is still on the road… when it snows, I’m safer in it, and having a lot more fun. I don’t have to worry about getting stuck in my driveway, and I can avoid accidents very easily.
No Jack, 4wd is not 4wd sometimes. In some vehicles they offer the sensing system that You mention. That’s electronic via the pcm.
If You take a Willys Jeep (or any mechanical 4wd setup), it is not parttime 4wd.
Jeeps & AWD: The NewGear (or whomever made it) 241 Tcase on the older Zj’s was “fulltime” AWD. You had 4hi, or 4lo. That was designed for highway speeds.
You want to know how many of those I replaced? Every one of them was a bad viscous coupling.
Otherwise, it’s still not recommended.
It’s also not recommended that You turbocharge a factory N/A motor.
Do people do it and have 0 problems? Yes.
Do people do it and have 13240198 problems? Yes.
um yeah…no
mecahnically actuated 4wd systems (cable or vacuum) which is A LOT of 4wd systems, means that when you are in 4hi OR 4lo, your front and rear wheels spin. most however, only have open differentials so only 1 front and 1 rear wheel actually provides power to the ground, usually the wheel with the least resistance to the ground. the only way your diffs would be locked in 4lo is if you had lockers, which you would also be able to use in 4hi. VERY FEW SUV’s or jeeps come with factory lockers (im not talking about AWD, thats different).
as far as stopping, mechanical 4wd will NOT help you stop, or steer for that matter, any better than 2wd. when braking, braking power is applied at the same ratio in 2wd as in 4wd, the driveshaft and axle have nothing to do with braking unless you downshift.
as far as turning in 4wd, its still exactly the same as turning in 2wd. i dont know how that works, but its like that, unless maybe you have your foot on the gas while youre executing a turn, which would be retarded if you had lost control of the vehicle.
www.howstuffworks.com is your friend.
and nikuk, the transfercases most jeeps use is a nu-process
that’s it, thanks. it’s been a while since i had jeeps.
turning my bronco in 4wd is easier and more controlable compared to 2wd.
because like someone allready said it helps “pull” the truck to where i want it to go.
ex. like driving on slant, in 2wd i slide right down the side, in 4wd the truck didnt slide cause the front tires “pulled” the truck instead of just steering. THIS IS FROM EXPERIENCE.
also… i have a limited slip diff in my rear axle, (most of the time is one wheel peel), when i lock the hubs and put it in 4wd, the front tires always turn together, or they dont turn. there has not been a time yet that only one front tire has turned and the other hasent. the rear end only does that.
:tup: again robert
I was referring to a 2004 Jeep Liberty Sport. Which when placed in 4HI is part time 4WD. When you place the shifter in 4HI a light on the dash indicates that PART TIME has been activated. I experimented with this many times. Place in 4HI, do burnout. Initially only the back tire(s) spin, then the front. I don’t care about other 4x4 setups, only the one in question.
As far as braking and steering… I don’t know if I should bother arguing the point… or if you guys just have to experience it for yourselves. 2WD could be FWD or RWD… but in either case… having power going to all 4 tires or 3 tires or 1 tire in front and 1 tire in the rear will help you in both cases more than not having any power going to either the front or the rear.
I’ve pretty much driven every application of FI and NA on all platforms… and know from experience, if I want to turn in the snow 4x4/AWD is better than 2WD anything.
http://auto.howstuffworks.com/four-wheel-drive4.htm
quoted from this page on howstuffworks:
“There are also some situations in which four-wheel drive provides no advantage over two-wheel drive. Most notably, four-wheel-drive systems won’t help you stop on slippery surfaces. It’s all up to the brakes and the anti-lock braking system (ABS).”
if you want to argue with this, then fine, but the guy who wrote the article is a mechanical engineer from cornell who worked for caterpillar and desgined HEV’s. im sure he knows more than you.
pointstoshifter
“I call that the cone-bone.”
Example 1 - Descending down a snowy hill. You apply the brakes to stop. You slide. Place the transmission in Reverse, lock the diff, and release the brake. Right now, Reverse + Traction is preventing you from sliding down the hill.
Example 2 - No ABS, and usual 70-30 braking ratio F/R. You apply the brakes, your front tires lock up, your back tires continue to push the vehicle. From the wheels that slip to the wheels that grip… now the power is taken away from the ones pushing you because the resistence from the brakes up front is now seen as “traction”.
If you are on ice, the only thing helping you stop is an anchor, or studded tires.
example 1: who the hell would put their transmission in reverse while they were moving forward going down a hill? why dont you just do it driving down the road at 10mph? if youre going down a hill and you want to stop, shift into a lower gear until youre at a speed where you can stop without sliding.
example 2: what are you talking about? i dont have ABS, and i have 4 wheel drive, braking in 4 wheel drive makes NO difference. you must be thinking about some sort of electronically controlled braking system, which DOES exist. it transfers braking power based upon which wheels have traction to stop, but thats a BRAKING SYSTEM, not a 4 wheel drive system. and this system only exists with ABS, if you dont have ABS, pump your brakes or downshift, thats all you can do, it doesnt matter if youre in 4 wheel or not.
:word: 4HI is part time… it definately says so right in the gauges :tup:
part time isnt specifically restricted to what jack is talking about. my 4 wheel drive is considered part time. basically anything that isnt AWD is part time.
If you are sliding down a hill… reverse is the only thing that will help you. I don’t think your seeing things clearly… If you are sliding… that means you are not rolling… which means your tires are not spinning 10mph, which means putting it in reverse will have no ill effects on the drivetrain at all. Obviously the brakes aren’t helping you… reverse is your friend.
Also - If you want to talk about other 4WD systems, thats fine, but this thread is about 2004 Jeep Liberty Sport. Last time I tried locking up the brakes in 4HI in a 2004 Jeep Liberty Sport when the front brakes locked up… the back tires stopped moving. When I did it an hour ago in my 2WD Chevy 1500WT Pickup truck, it almost pushed me into the neighbor’s fence.
:word: on reverse when sliding, it does work, it would be one thing to slam the tranny into R when the tires are moving in the foward direction, but when all 4 are locked up, put it in reverse and eas on the gas, if u floor it, especially in my truck the tires will just spin.
I could add to this whole debate, but I’m too lazy right now. What would I know anyways…I was only the Ranger/Explorer/Sport Trac transfer case engineer the past year at Ford…:gotme:
^^^ :wtf:
know anything about 88 bronco transfer boxes
i still dont think thats a good choice considering downshifting is much safer than throwing it in reverse while your sliding forward with the brakes locked up then flooring it in 4 wheel.
1st, im telling you thats not an attribute of a 4wd system, i think its called active BRAKING, its a BRAKING SYSTEM, not a 4wd system. it works by applying different amounts of breaking power to wheels that the sensors determine can stop better than other wheels. if you can show me something written by a credible author saying that whatever youre talking about is an attribute of a 4wd system, and not a braking system, i will gladly bow down and before you and apologize.
2nd, how do you lock up the brakes with ABS?
i ask that you add to this debate. i dont mind being wrong, but id like some more fact than ‘‘ive driven everything, i know how it works’’