you always have to put your truck in neutral before going in to 4wd or 4 low

 

Apparently quoting the owner's manual isnt good enough, so lets break it down.

4HI- tranfering power thru the transfer case to the front axle in addition to the rear axle. YOU CAN SHIFT ON THE FLY IN DRIVE!!!

4LO- transfering power thru the transfer case to the front and rear axle and lowering the gear ratio!!!! Hence the name 4LO. Of course you have to be stopped in park or neutral b/c you are changing the gear ratio to both the front and rear axles!!!

 

1++++ Read the manual. You can shift into 4hi at any speed up to 55. 4lo must be at a stop.

 

^^^+2^^^^. but if possible i always try to be at a stop when shifting in 4wd hi. it just makes me feel better.

 

Hey thanks to all for their info. I guess I am not jerking it hard enough or fast enough (minds out the gutter, LOL). I guess unless absolutely necessary I am just going to be stopped when I shift into it. Makes me feel better! Again thanks.

 

what about on a 94. My truck seems to shift into hi easiest around 15mph.. id never try it faster then that.. Is something different with the older trucks.

 

94-01 are all shift on the fly for 4hi

 

Mine shifts into 4hi more easily when I'm moving. The manual wouldn't tell you you could do it if it wasn't made for it!

 

I have a question I have a 99 V10 3500 4x4 can you shift this into 4 hi on the fly without hurting the transfer case?

 

Basically if its a manual you can put in the clutch and do it on the fly if its an auto it can be done but you will hear gear clashing because all the gears in the transfer case are still rotating and are not syncro'd