stupid n00b question

[97BlackAckCL]

Have always wondered this, figured I would ask here. Go easy on me guys, just trying to get an answer to this question.

What does locking the center dif do, and what are the benefits of doing it when in 4WD?

 

[Doozi]

Locking the center diff "locks" the power-split to a 50/50 front/rear split. Having your Torsen center diff in 4Hi with the center diff UNlocked is all-wheel-drive which allows the power split to adjust as necessary and allows your 4Runner to make turns (on high traction surfaces) without putting stress on the center diff.

You'll also notice that your VSC turns off with the center diff locked which allows for more wheels spin.

~Doozi

 

[Gecko123]

Have always wondered this, figured I would ask here. Go easy on me guys, just trying to get an answer to this question.

What does locking the center dif do, and what are the benefits of doing it when in 4WD?

I'm not an expert but have asked this question before and have done some reading on the internet.

1. You never lock the differential when driving on dry pavement
2. You may want to lock it when driving in deep snow, mud, etc. When locked all four wheels get the same amount of power. When unlocked, the power shifts back and forth from the front to the back accordingly, and this may not always be best. The car is "guessing" what is best and shifts the power accordingly. But with the diff locked, all four wheels get the same amount of power, regardless if the wheel is in a low traction spot. Sometimes this is beneficial, as wheel spin can actually help gain traction by flinging out the mud, snow, dirt, etc.
But be very careful when driving with diff locked as VSC is turned off automatically, so your vehicle may loose control.

 

[97BlackAckCL]

Great answers guys, exactly what I was looking for, thanks

 

[Doozi]

When locked all four wheels get the same amount of power.

It should actually be stated that both front and rear drive shafts get the same power... the center diff (transfer case) locks and drives both front and rear shafts at the same speed. This is why you shouldn't turn on high-traction surfaces like dry pavement. Your front and rear diffs remain open and allow power to move left and right although A-TRAC engages to try and limit wheel spin.

Just an additional clarification... I hope,
~Doozi