Swap differentials for off-road?

[yukonoffroad27]

I have a 2001 GMC Yukon SLT, with a 5.3l, and selectable 4x4. I am trying to find out what axles it has (it's stock) and possible locker/differential swap options. It will be a daily driver and part time trail rig.

 

[HiHoeSilver]

I have a 2001 GMC Yukon SLT, with a 5.3l, and selectable 4x4. I am trying to find out what axles it has (it's stock) and possible locker/differential swap options. It will be a daily driver and part time trail rig.

Look at the RPO sticker on the glove box. You probably have GT4 which is a 3.73. GU6 would be 3.42. Since you have 4wd and not AWD, also look for a G80 code. That's the locker.

 

[yukonoffroad27]

Okay thanks for the help! How would these be offroad with stock size tires? Also is there a known reason for it having a hard time coming out of 4-Low? I have to try to get it to disengage multiple times before it finally switches. It usually works if i put it in neutral and let it roll a little bit.

 

[HiHoeSilver]

Read in your manual. You should always be in N going into or out of 4LO.

 

[yukonoffroad27]

Alright that seems to work every time thanks

 

[swathdiver]

I think your differential is like mine in that it is a posi and a locker, there's a post on the NNBS side of the forum about how it works.

 

[yukonoffroad27]

I think your differential is like mine in that it is a posi and a locker, there's a post on the NNBS side of the forum about how it works.

I think it is, I got it in a ditch with one rear tire off the ground and put it in reverse, then I hit the gas and both rear tires spun, and it will do the same on gravel. Not quite sure how to tell if it's a locking differential or limited slip but it works pretty good .

 

[HiHoeSilver]

I think it is, I got it in a ditch with one rear tire off the ground and put it in reverse, then I hit the gas and both rear tires spun, and it will do the same on gravel. Not quite sure how to tell if it's a locking differential or limited slip but it works pretty good .

Locking and limited slip are the same thing.

 

[yukonoffroad27]

Locking and limited slip are the same thing.

Okay thanks for clearing that up!