4x4 not engaging need help

Drewtay · April 12, 2019

I have a 02 gmc 1500 HD with the 246 transfer case when I push the buttons it sounds like it is engaged but 4x4 won’t work

Brian715 · April 13, 2019

What kind of sound does it make that makes you think it is engaging? Does the front driveshaft spin when engaged? This could narrow it down to an issue in the front end and not the Tcase. If the front driveshaft doesn't spin, then your issue is in the Tcase or the solenoid that shifts the Tcase. Also maybe get it on a lift or jack stands if possible to easily see if the wheels spin

Edited April 13, 2019 by Brian715
Add info

Drewtay · April 13, 2019

No the drive shaft doesn’t spin the t case sounds like it is engaging but it just not driving the front diff

Drewtay · April 14, 2019

On 2019-04-13 at 12:02 AM, Brian715 said:

What kind of sound does it make that makes you think it is engaging? Does the front driveshaft spin when engaged? This could narrow it down to an issue in the front end and not the Tcase. If the front driveshaft doesn't spin, then your issue is in the Tcase or the solenoid that shifts the Tcase. Also maybe get it on a lift or jack stands if possible to easily see if the wheels spin

No the front drive shift doesn’t turn when the truck is on the ground but I have 4x4 when the truck is lifted up I can hear the solenoids working when I engage the 4x4

Brian715 · April 14, 2019

Sounds like the Tcase clutches are shot.

Drewtay · April 14, 2019

41 minutes ago, Brian715 said:

Sounds like the Tcase clutches are shot.

Are they easy to fix

Brian715 · April 14, 2019

If that is indeed what it is, a rebuild is in order. If you feel confident in removal of the Tcase, there are a few YouTube videos that show the process of the rebuild. It's not super complicated IMO. Might be worth trying to find a junkyard or used one if you aren't confident on the rebuild, and then it's just a matter of remove and replace.

Drewtay · April 14, 2019

4 minutes ago, Brian715 said:

If that is indeed what it is, a rebuild is in order. If you feel confident in removal of the Tcase, there are a few YouTube videos that show the process of the rebuild. It's not super complicated IMO. Might be worth trying to find a junkyard or used one if you aren't confident on the rebuild, and then it's just a matter of remove and replace.

I’ll probably pick one up until I get mine rebuilt