Hi guys, I don't write really often but I follow some of the nice build here. 
My problem is pretty difficult to explain: When I drive on 2WD, everything is normal and fine but when I put the 4WD Hi, the truck seems to have difficulty to move. I noticed that strange trouble last winter while I was pulling my race truck. But I assumed it was normal on a full size 4WD truck. (It's my first truck and I'm more use to drive AWD cars!!)
Now, I geared the 4WD yesterday to just climb in my yard and I noticed that the problem was more worst than ever. I even tried to drive on a flat straight road and it feel like if I'm braking constantly when on 4WD Hi. I have to push ******* the gas pedal to make the truck begin to move.
My truck is a 2002 Yukon XL SLT, I changed the T-case oil like 2k miles ago and checked transmission and front diff oil level.
I hope someone will be able to point me something because I confused with this...
My problem is pretty difficult to explain: When I drive on 2WD, everything is normal and fine but when I put the 4WD Hi, the truck seems to have difficulty to move. I noticed that strange trouble last winter while I was pulling my race truck. But I assumed it was normal on a full size 4WD truck. (It's my first truck and I'm more use to drive AWD cars!!
)Now, I geared the 4WD yesterday to just climb in my yard and I noticed that the problem was more worst than ever. I even tried to drive on a flat straight road and it feel like if I'm braking constantly when on 4WD Hi. I have to push ******* the gas pedal to make the truck begin to move.
My truck is a 2002 Yukon XL SLT, I changed the T-case oil like 2k miles ago and checked transmission and front diff oil level.
I hope someone will be able to point me something because I confused with this...
