SIERRAGX

I purchased a 2004 GX 4 months ago, I really enjoy this truck, it has 63k on the clock, I want to change all differential fluid including transfer case. And I don't know if my car has LSD, have some question and looking for help;
1. Does all GX come with LSD?
2. Is LSD only applied to the rear dif ?
3. I looked under the car, the rear Dif fill plug area has no label or imprint to indicate either or, so how can I tell if it's LSD equipped.
Thanks in advance for all your help.I did try to search but did not find the info on this subject.
Andrew

antonio98

From the owners manual:

SIERRAGX

Thanks Antonio, I did read the manual from cover to back when I got the car, some how missed that.

kutsyy

to be more specific, GX has TORSEN Central LSD (http://en.wikipedia.org/wiki/Torsen for more info).

SIERRAGX

Thanks for the link,learn a lot.
now I am thinking using M1 synthetic gear oil for the front and rear, get OEM T case oil from Toyota.

stiles_s

Yes, we have a Torsen center diff. It handles shifting power (torque) between the front and rear axles as needed (if one end loses traction).

I thought, though, that we also had a limited-slip rear differential. Anybody know for sure?