Front Driveshaft Always Suppose To Spin?

[MikeNH]

Ford has also gone back to a hub setup to disconnect the axles from the wheels in 2WD. It's not selectable but vacuum actuated and sits behind the wheel bearing (hopefully it's not part of it cause that will be a big repair bill when a bearing fails!).

[pm26]

My '95 Nissan V6 pickup had automatic front locking hubs and a manually activated transfer case. I never had any problem with the 4WD system on that truck. The front axles and differential did not spin in the 2WD mode. To unlock the automatic hubs, you had to move the vehicle in the 2WD mode about 5 ft in the direction opposite to the direction when the hubs were locked in last.

[Fallz]

 

 

The front drive shaft will turn no matter what transfer case you have unless you have locking front hubs - that are unlocked.

 

 

This is totally correct .

[Doug_Scott]

Manual transfer cases don't spin the front driveshaft in 2WD. My 2007 Toyota FJ Cruiser and 1985 Ford F150 did not spin the front driveshaft in 2WD. I haven't checked my 2005 Silverado 2500HD to see if it spins in 2WD.

 

DEWFPI

 

The front drive shaft will turn no matter what transfer case you have unless you have locking front hubs - that are unlocked.

 

 

Maybe in a GM product but that is not necessarily true of other manufacturers.

 

My 2007 Toyota FJ Cruiser with Part Time 4WD, does not spin the front driveshaft and does not have unlockable hubs. It does have an "Automatic Differential Disconnect". When I manually shift the transfer case into 4Hi or 4 Lo it mechanically engages the front driveshaft and thru an electrical actuator, connects the CV shafts to the front differential. The Part-time 4WD FJC"s get about 2 mpg better than the Full Time 4WD FJC's with a 3rd differential (Gleason-Torsen) in the Transfer Case.

 

Other manufactures may use different technologies but not all 4WD vehicles spin the front driveshaft in 2WD, even without unlockable hubs, that's a fact.

 

DEWFPO

 

 

What you are describing is still a form of locking hub. Something is disconnecting the wheel from the diff. Never said it was a manual locking hub. And the OP was talking about a current GM model wasn't he?

[dewfpo]

What you are describing is still a form of locking hub. Something is disconnecting the wheel from the diff.

 

Yes, a wheel hub disconnect and a differential disconnect essentially do the same thing. They minimize rotating mass.

 

] Never said it was a manual locking hub.

 

That's correct, you never did.

 

] And the OP was talking about a current GM model wasn't he?

 

He didn't specifically state so but it would appear so, yes.

 

DEWFPO

[Mckenzie]

i was talking about the truck in my sig

[WilliamBos]

Is this the same for my 2011 GMC 1500 manual shift MP1222 transfer case?

 

In 2 wd everything spins, but the front diff is disconnected?

[CapitalTruck]

The driveshaft in my 4wd with manual tranfer case doesn't spin in 2wd. I feel like the front axle actuator is responsible for disconnecting the front end of the driveshaft.