Transferbox question

[Dieseler]

My JDM 41 has a vacum transfer box can it be activated while the vehicle is in motion or does it have to be at a dead stop,the instruction plate on the glovebox is in Japanese so i am not sure,my 83 bj I can shift in and out on the fly but not sure about my older 41 and dont want to take a chance pulling the dash knob while in motion.

 

[3_puppies]

not certain ,but I would think as long as the hubs are locked in (if equipped) and the rear wheels are not spinning, both front and rear driveshafts are spinning at the same RPM, you should be able to shift in and out of
4H , you would need to stop to go into 4L

I was doing just that with my 62 series yesterday.

 

[spotcruiser]

You should be able to do it on the fly. My 40 will shift into 4H easily between 20-30 mph (I don't do it at higher speed than that, although I probably could). I typically use the clutch when I am doing it, but I don't think it is necessarily required. I usually stop to put it into 4L. If I need 4L (especially with the Orion), I should be going slow anyway. It is usally more difficult to get out of 4wd. I make sure that the truck is coasting in a straight line, put in the clutch, and occasionnaly work the clutch in and out a little until it'll go into 2WD.

 

[Dieseler]

Spotcruiser does yours have the FD pull out knob on the dash,with the snow we are experiencing I would like to leave my hubs locked in and be able to select 2W or 4H as I drive on the constantly changing road conditions.

 

[spotcruiser]

Nope. I have the manual linkage on the floor. The vacuum shifter would certainly be more convenient, but I don't mind yanking the shifter handle. Been doing it for about 31 years now.

By all means, leave your hubs engaged. You ought to do that occasionally anyway, even during good weather, just to keep everything up front lubricated and exercised. It'll just lower your fuel mileage a little and make it a little stiffer to steer. My '78 came stock with just drive plates on the front axle (not locking hubs). I carry the drive plates on the trail in case I lose a hub.

Spotcruiser does yours have the FD pull out knob on the dash,with the snow we are experiencing I would like to leave my hubs locked in and be able to select 2W or 4H as I drive on the constantly changing road conditions.

 

[amaurer]

not certain ,but I would think as long as the hubs are locked in (if equipped) and the rear wheels are not spinning, both front and rear driveshafts are spinning at the same RPM, you should be able to shift in and out of
4H , you would need to stop to go into 4L

I was doing just that with my 62 series yesterday.

You should be able to do it on the fly. My 40 will shift into 4H easily between 20-30 mph (I don't do it at higher speed than that, although I probably could). I typically use the clutch when I am doing it, but I don't think it is necessarily required. I usually stop to put it into 4L. If I need 4L (especially with the Orion), I should be going slow anyway. It is usally more difficult to get out of 4wd. I make sure that the truck is coasting in a straight line, put in the clutch, and occasionnaly work the clutch in and out a little until it'll go into 2WD.

I've shifted in and out of 4H while moving, works fine. As others have said, it requires flat ground and straight-line travel to be safe, although I bet there is enough slop in the various components that you could jam into 4H is less-than-flat conditions at your peril