Engine/Transmission (1998.5 - 2002) Truck Has A Hard Time Going Into 4x4

[VHolloway]

You Need To Stop The Truck Put It In Park And Then You Can Get It To Go Into 4 Wheel Drive. But Even Then It Does Not Want To Go In

It Makes A Grinding Sound.

99 2500 4x4

 

[FLynes]

My 97 was a pain it the rear like that too, and the stealership tech told me that it was normal. I think that's BS. Seems like something needs to be periodically lubed.

 

[VHolloway]

These Trucks Are Shift On The Fly

But We Are Easy On Our Stuff We Even Backup 15 Feet When Going Fron 4 Wheel Drive To 2 Wheel Drive

 

[liberty]

I know tire wear can play a big part in how the 4x4 engages and disengages, If your tires on the rear are worn at all more than the the front set you will have problems with engagement.

 

[VHolloway]

We Have New Bfg Mt Tires

Coud The Transfur Case Be Low On Fluid

 

[nutter3]

Did this start when you put on the new tires? I had a problem with a Les Schwab putting on one wrong sized front tire. Gave me problems with engaging/disengaging 4. I wasnt too happy when I found that one out.

 

[FLynes]

You know, come to think of it, I had the problems shifting into 4wd when I had the 305's on. When I went down to the 265's the problem disappeared.

 

[Extreme1]

Shift on the fly is an ad campaign made up by marketing folks. There is a ton of stuff to spin up (unless you have a late second gen without the CAD on the front axle). I've had my T-case apart and I WILL NOT shift it above 10-15 mph.



If you are familiar with manual transmissions, the T-case uses a nice synchro ring to spin up the big, thick gear that is on the rear output shaft (weighs a couple pounds) which spins the chain (a few more pounds) which spins the output shaft gear (weighs a few pounds) which spins the DRIVESHAFT which spins the FRONT CARRIER. Lots of mass to accelerate with a synchro ring. Oh, and the shifter fork has plastic wear pads on it where it rides on the shift collar.



As for your problem, make sure the T-case is full and the fluid is in good shape. When you shift, be going slow with you foot off the throttle (auto) or in neutral with the clutch in (stick). If it still doesn't want to go, stop and put the trans in neutral (not park). For shifting into 4 Lo, stop and use park (auto) or in gear with the clutch in (stick).



The backing up 15 feet was to disengage lockouts, it doesn't do anything on these.