Well let me first introduce myself, my name is Carlo and im a complete noob when it comes to off roading and iam still currently in the learning process. My eyes are bloodshot red due to mass hours of searching and reading on this forum. Now here are my questions, with the 5at when would a person use 4wd hi or lo?? Is one used from 0mph-30 and the other from 30-50mph? Is there a 2wd hi or lo on the 5at? I know its a major noob question but ive gotta start somewhere!
Hopefully in the coming months ill be able to purchase a 6mt or 5at (still in the debating process) BD FJ or a black Honda s2000. Yes I know they are 2 COMPLETELY different vehicles but Im a die hard sports car enthusiast but the "practical and sensible" bug has bit me. Plus the idea of cramming paintball gear, snowboarding gear, and a mountain bike wouldnt do so well in an s2k. hahaha.
Last edited by Carbon Blue : 08-19-2008 at 04:21 AM.
Well let me first introduce myself, my name is Carlo and im a complete noob when it comes to off roading and iam still currently in the learning process. My eyes are bloodshot red due to mass hours of searching and reading on this forum. Now here are my questions, with the 5at when would a person use 4wd hi or lo?? Is one used from 0mph-30 and the other from 30-50mph? Is there a 2wd hi or lo on the 5at? I know its a major noob question but ive gotta start somewhere!
Hopefully in the coming months ill be able to purchase a 6mt or 5at (still in the debating process) BD FJ or a black Honda s2000. Yes I know they are 2 COMPLETELY different vehicles but Im a die hard sports car enthusiast but the "practical and sensible" bug has bit me. Plus the idea of cramming paintball gear, snowboarding gear, and a mountain bike wouldnt do so well in an s2k. hahaha.
2wd is for your everyday driving. Aside from slow speed snow conditions there will be no need to come out of 2wd, and even then consider not coming out of 2wd. A lot of people stick it in 4wd and forget that it doesnt help you corner or stop so they end up crashing.
For offroad (the good stuff). 4Hi is good for when your going to be moving at a decent speed. Dirt roads, sandy baja-like stuff, some mud stuff, etc. 4Lo is good for when you're crawling. it keeps the engine from working too hard to get you over an obstacle by changing the ratio of engine rotations to wheel rotations. It also gives you more control when moving slowly. Somewhere in the manual it says what speed to not exceed in 4lo, I want to say its 20mph, but I dont remember. Just remember to completely stop and put into neutral before changing to 4lo or back to 4hi.
the auto does not have a 2lo. I dont know about the manual.
thanks for the info. If im traveling to mammoth or big bear or anywhere where there are patches of snow or ice on the asphalt would I use 4Hi for this type of situation? I read that 4wd on the 5at should not be used if your on paved roads because of binding the drivetrain.
thanks for the info. If im traveling to mammoth or big bear or anywhere where there are patches of snow or ice on the asphalt would I use 4Hi for this type of situation? I read that 4wd on the 5at should not be used if your on paved roads because of binding the drivetrain.
Excellent description by HAFF.
4LO is a second, lower gear gear in your transfer case. If you are in 4LO you can still run thru the transmission gears but you be be at a substantially lower speed. It is great for climbing over tough obstacles where you need extra torque and usually want to just crawl over them at slow speeds.
As to your question, you are correct. Only use 4WD if you need it, On the street if there is ice and/or snow on it you will only used 4HI. I highly recommend that you not drive on any high friction surface (ashpalt, concrete) while in 4WD with the Part Time Transfer Case (5AT).
DEWFPO
__________________ 2007 FJ, 5AT, Sun Fusion Yellow, CQ, UP, GY, RB, 2Q, EL, VS.
"Wanted - young, skinny, wiry fellows, not over 18. Must be expert riders willing to risk death daily. Orphans preferred"
Original newspaper add placed by William Hepburn Russell, founder of the The Pony Express
4LO is a second, lower gear gear in your transfer case. If you are in 4LO you can still run thru the transmission gears but you be be at a substantially lower speed. It is great for climbing over tough obstacles where you need extra torque and usually want to just crawl over them at slow speeds.
As to your question, you are correct. Only use 4WD if you need it, On the street if there is ice and/or snow on it you will only used 4HI. I highly recommend that you not drive on any high friction surface (ashpalt, concrete) while in 4WD with the Part Time Transfer Case (5AT).
DEWFPO
thanks, would using chains and 4wd hi create too much friction to bind the drivetrain? Or would the use of chains only require 2wd??
thanks, would using chains and 4wd hi create too much friction to bind the drivetrain? Or would the use of chains only require 2wd??
As long as your on loose or slippery material it shouldn't be a problem. The tires can still slip with the chains under those conditions. You will be surprised at how much traction you have without chains in 4WD with the help of the TRAC system. It is automatically on so you don't have to do anything. It will adjust your power and apply brakes to the slipping tire(s) as needed to maintain traction. You will hear it (ABS clicking) and feel it (brake pulsating) so get used to it and don't let off the gas or panic when it happens. Just be steady. It's doing it's job.
DEWFPO
__________________ 2007 FJ, 5AT, Sun Fusion Yellow, CQ, UP, GY, RB, 2Q, EL, VS.
"Wanted - young, skinny, wiry fellows, not over 18. Must be expert riders willing to risk death daily. Orphans preferred"
Original newspaper add placed by William Hepburn Russell, founder of the The Pony Express
ive got another question for anyone out there. If the 6spd is full time 4wd and has 4Lo and 4Hi, how would 4Hi benefit the 6speed if it already is full time 4wd? I mean 4Hi would be used in situations north of 40mph correct? So why would one have to engage it if they could just use the regular gear box? I understand the idea of 4Lo with the 6 speed since it would give it a higher gear ratio.
4HI is the default highway setting for the full-time FJ it utilizes the torsen center differential to automatically split power front to rear. It also has 4HI locked and 4LO locked positions. 4HI locked is the equivalent of 4HI in the auto trans models and should not be used on hard dry surfaces.
Check out the FJ bulletin on this site. I think you will find it helpful in understanding the vehicle better (click on the engineering tab)
I mean 4Hi would be used in situations north of 40mph correct?
4HI (with the 5AT) is used from 0 mph to whatever speed safe driving and conditions permit. Use 4HI when you NEED the extra traction and you don't need the gear reduction that 4LO gives you.
As RoverGGM stated, with the Full Time 4WD unit, the center differential in the transfer case allows for driving on high traction surfaces like pavement without any problems. When a 6MT FJ is using 4HL (high lock) or 4LL (low lock), the center differential is locked and the front and rear driveshafts turn as one just like in a Part time 4WD 5AT FJ that is in 4HI.
DEWFPO
__________________ 2007 FJ, 5AT, Sun Fusion Yellow, CQ, UP, GY, RB, 2Q, EL, VS.
"Wanted - young, skinny, wiry fellows, not over 18. Must be expert riders willing to risk death daily. Orphans preferred"
Original newspaper add placed by William Hepburn Russell, founder of the The Pony Express
When we were at the Summit on Corkscrew I asked Chris nelson about gearing. On the trails we were in 4LO. If you have an AT he recommended Drive for going uphill because it would give you more power. When going down hill use a lower gear to let the engine help in braking. In really steep situations you want to use low. An interesting side note - when in 4LO 4th gear is the highest gear you can use. When in 4LO the overdrive gear does not engage. Welcome to the Forum Carlo.
2007 FJ, 5AT, Sun Fusion Yellow, CQ, UP, GY, RB, 2Q, EL, VS.
Linear Mode
