explain center locking Diff.

[britton406]

So I know my T4R has a center locking diff.. I just have no idea how it works. does it lock power 50 to the front and 50 to the rear? does it allow slipping by giving power to the tire with least resistance? Any one know how it works?

I looked it up in my manual, but there really isn't much of a description. Its more of a "how to use central diff" section.

 

[subst4nce]

I posted this a while back:

http://www.toyota-4runner.org/gener...ferentials-explained-those-who-dont-know.html

It doesn't really explain exactly what you want to know, but maybe it'll help

 

[sonerick]

If you lock the center diff, you will lock the front and rear driveshafts together so they will turn at the same speed, 50/50 torques split to front and to the rear. In 4HI, locking the center diff also turns off VSC (engine won't dethrottle with wheelspin). IN 4LO, VSC turns off automaticaly, so locking the center diff will only, well, lock the center diff...

Without the center diff locked, the vehicle senses wheelspin and adjusts the torque split to the front and rear driveshafts accordingly.

 

[britton406]

Alright thanks! So to clarify using the rear as an example; even with it locked, one wheel in rear can still spin at a different speed since its looked in the center instead of rear?

Sent from my ADR6300 using Tapatalk

 

[4Runner8]

theres a search button, couldve found that answer pretty quickly as it was talked about only a few days ago. not to bash you but im tired of ppl post whoring new threads. they dilute all the good ones. rant over


hope you figured it out. have fun with it

 

[sonerick]

Correct, you would need a rear locker for both rear wheels to turn at the same speed regardless of traction. However ATRAC will work by applying the brakes to the spinning wheel to aid in traction.

 

[M1911]

With the center diff locked, that means both the front and rear driveshafts turn at the same speed. However, you still have unlocked front and rear differentials. So that means the right rear wheel can turn at a different speed than the left rear wheel (and the same for the front as well).

You will find it hard to turn with the center diff locked, and you should not drive on dry pavement with it locked.

 

[britton406]

theres a search button, couldve found that answer pretty quickly as it was talked about only a few days ago. not to bash you but im tired of ppl post whoring new threads. they dilute all the good ones. rant over


hope you figured it out. have fun with it

I was under the impression this was a discussion forum. With that said, the searches I found didn't really answer my question 100%, and even if it had, I wanted someone to confirm it. Hopefully, you don't actually think every topic will only be discussed once because of the search engine, otherwise you should sign out because it's going to keep happening. I get tired of people like you that gripe about questions. After all, this isn't a new model and I imagine a large portion of the 4th gen has been covered, so according to your philosophy, we might as well shut the forum down.

 

[britton406]

oh and thanks sonerick and M1911!
that answered my question

 

[4Runner8]

I was under the impression this was a discussion forum. With that said, the searches I found didn't really answer my question 100%, and even if it had, I wanted someone to confirm it. Hopefully, you don't actually think every topic will only be discussed once because of the search engine, otherwise you should sign out because it's going to keep happening. I get tired of people like you that gripe about questions. After all, this isn't a new model and I imagine a large portion of the 4th gen has been covered, so according to your philosophy, we might as well shut the forum down.

or a simple pm to someone that talked about it. you said you found things, but it didnt answer your question. pm would have been fine. as i said i wasnt trying to burn you, but since you took it personal i guess i cant do anything about that. maybe you should just learn to :rtfm: not that hard. if ppl posted new sh1t all the time no one would want to answer their questions, because as i said you can find a ton on search, or even google search.

im glad you figured it out. enjoy your 4runner, they are fun, capable machines, and will last a long time

ps. all you had to do was ask the question in one of the threads you found and it would have been answered. no need to make a new thread. "when in doubt about starting a thread, just ask in one that is similar topic, even if it might be a little off topic of that thread"

 

[britton406]

or a simple pm to someone that talked about it. you said you found things, but it didnt answer your question. pm would have been fine. as i said i wasnt trying to burn you, but since you took it personal i guess i cant do anything about that. maybe you should just learn to :rtfm: not that hard. if ppl posted new sh1t all the time no one would want to answer their questions, because as i said you can find a ton on search, or even google search.

im glad you figured it out. enjoy your 4runner, they are fun, capable machines, and will last a long time

ps. all you had to do was ask the question in one of the threads you found and it would have been answered. no need to make a new thread. "when in doubt about starting a thread, just ask in one that is similar topic, even if it might be a little off topic of that thread"

Like i said, I read the manual and there was no section on how it works or what it does, only what its for. and posting in an already open topic would just Bumb it anyways.

 

[4Runner8]

it really doesnt matter anymore, its already been done, glad you figured it out. i dont want to make enemies with anyone. now go have fun with it, try some donuts in dirt. thats always fun

 

[Dawg4Runner]

im tired of ppl post whoring new threads. they dilute all the good ones.

Wow!:wow: "He who lives in a glass house should not cast stones." A search of a certain member's posts on this forum and 120 would certainly reinforce that proverb. Chill out Will, the forum is here for people to share information and learn. Thankfully there are those who take the time out to help others understand. Sometimes the information offered in the new posts contain more current or additional information beyond what a search might yield. If the post bothers you that much, you can always ignore it.

Cheers :beer:

 

[03_4x4Runner]

So I know my T4R has a center locking diff.. I just have no idea how it works. does it lock power 50 to the front and 50 to the rear? does it allow slipping by giving power to the tire with least resistance? Any one know how it works?

I looked it up in my manual, but there really isn't much of a description. Its more of a "how to use central diff" section.

Unfortunately this is probably why Toyota went back to a part time sysyem on the 5th gen 4runner. No one could figure out how to use the dif lock etc. To bad because it is a great system.

 

[britton406]

Yea well I finally understand I will try and spread the knowledge!

 

[Bedstraps]

I will be driving on the beaches of the outer banks this summer. From what I have read people said to use the Diff lock or else the ATRAC will annoy the crap out of me. But I have also heard to not use it except for short distances. So I am wondering how many miles and at what top speed I should drive with the diff lock engaged. I think normal beach cruising is between 15 and 25 mph.

For those of you who do not know the outer banks are all sand. Deep sand, shallow sand, wind blown sand, shelly sand, orange sand, white sand, yellow sand etc. Alot like playground sand.

 

[M1911]

Bedstraps, I run my 4Runner on the beach at Cape Poge every year for two weeks. I lower my tire pressure to 15 psi and lock the center diff. I've done it in 4hi, but the engine seems to work easier in 4lo, so that is what I use. My speeds are usually less than 20 mph. There is absolutely no problem having the center diff locked for long distances, provided that you are offroad on a slippery surface like sand.

No problems at all doing that, and I've been doing it since 2003.

 

[chaz]

bedstraps, when ur in 4wd, ATRAC is on whether the center diff is locked or not. its VSC which can get annoying, thats turned off when locking the cent. diff.

 

[Bedstraps]

Bedstraps, I run my 4Runner on the beach at Cape Poge every year for two weeks. I lower my tire pressure to 15 psi and lock the center diff. I've done it in 4hi, but the engine seems to work easier in 4lo, so that is what I use. My speeds are usually less than 20 mph. There is absolutely no problem having the center diff locked for long distances, provided that you are offroad on a slippery surface like sand.

No problems at all doing that, and I've been doing it since 2003.

Do you have a V8 or the V6? Why would you need 4-lo?

 

[TOYLUVA]

I will be driving on the beaches of the outer banks this summer. From what I have read people said to use the Diff lock or else the ATRAC will annoy the crap out of me. But I have also heard to not use it except for short distances. So I am wondering how many miles and at what top speed I should drive with the diff lock engaged. I think normal beach cruising is between 15 and 25 mph.

For those of you who do not know the outer banks are all sand. Deep sand, shallow sand, wind blown sand, shelly sand, orange sand, white sand, yellow sand etc. Alot like playground sand.

I was just there yesterday. Live 10 minutes away. 20 lbsof air 4lo diff locked and speed limit is 15. creep around in the ruts. there packed. dont cross ruts any more than you have to it just makes it harder on everyone else and stay on the right just like you were driving on the street. donuts and even spinning tires is illegal. be careful . have fun. take a fishing pole for sure. I love oregon inlet. beautiful place. the tip of the north side is closed for nesting so you wont be ablt to get to the bridge.