4wd front Diff engagement

I've had my taco now for a couple months and noticed that the drive shaft from the transfer case to the the front diff spins freely in 2wd when parked, but the shafts to wheels don't . Does this mean the front diff locks when torque is applied? Came from a Jeep where all of that hardware is engaged to the front wheels whether in 4wd or not.

 

What generation Tacoma? Manual hubs or automatic? Need a bit more info.

 

Sorry , Just updated my profile. 2014 Off Road .

 

I wouldn't think it would spin freely unless it's some new design Toyota has come up with lol

 

this seems accurate enough

 

It is very accurate. Doording is right on the money.

 

Interesting , This means when you switch to H4/L4 two mechanical actions occur- transfer case and front diff.?

 

yup.

Toyota used to call it ADD (automatic disconnecting differential)

now its just standard as none of their 4wd systems offer manual hubs.

 

It's still an ADD, for shift-on-the-fly 4WD... an improvement over Auto. Locking Hubs, which required driving in reverse to unlock them. Some still swear by manual locking hubs, so they know it is 100% locked for 4WD!

 

Is there an ADD fuse you can pull to get L2? If it is uneven terrain, won't L4 work?

 

Mine does the same thing, it should do this.

 

Of course.

Me too x10 ... I've looked at the mod a lot for I guess 3 yrs now ... it still scares me. Had my son (he's pretty good with wiring/electrical) look at it too ... it scares him as well.

I'd sure like to have that functionality though.

 

My Tacoma has ADD?

 

Can someone post a link to the mod? I tried to get it myself but the 4x4 controller knows if the front has done its job or not. The trick is making the computer think the front is engaged.

 

Here ya' go.

 

Ty

 

No wonder I couldn't find it under ADD MOD

 

Since H4 can be engaged at 50MPH , I would think the front propeller shaft and associated gears would need to spinning and synchronized with the rest of the drive train? Just trying to understand how this works compared to the Jeep Select-Trac .