I recently had the front differential replaced with a used one due to the high expense. After I got it back - when I hard accelerate taking a left, right or straight, the DSC light comes on and I can hardly control the vehicle as it seems that it pulls back or forth. It eventually kicks off, but it takes about 10 seconds or so for it to reset. This cannot be normal, any thoughts?

 

Did the used diff come from a supercharged sport? Different gearing...

 

Thanks for that as I will discuss this with the mechanic tomorrow. If it is different gearing, wouldn't it act up all the time then?

 

I've never experienced it but know a shop that did. The way he described it was at take off speeds. They didnt drive it too much as they knew there was a problem straight away.

Does it happen at the same speeds every time or it's intermittent?

 

If the gearing is different, one of the differentials and/or transfer case isn't going to last very long. With all wheel drive, one will be turning faster than the other.
The symptoms don't sound like thst's the problem though.
Does yours have the ACE steering system on it?

 

ACE? That's a DII feature, not on the LR3. OP...is this an LR3 or a DII?

 

Sorry, I thought it was in the D2 section.
My phone doesnt tell me which

 

I've experienced similar behavior due to poor alignment or wheel/tire changes.

When you floor it, acceleramators to into crazy mode to figure out what's going to bust loose first. Any slight issue with steering angles or suspension geometry will throw off the sensors and computers.

There was one corner on my way home from work that would ALWAYS randomly trigger DSC. Uphill left-hand turn off-camber unloading suspension. I just started pressing the button to disable it before the turn lol. Never even an inclination of an issue - totally a calibration or alignment issue.

DSC is important though, totally saved my butt in my RRS.

 

When my front and rear suspension bushings were getting sloppy it would trigger on turns that would otherwise be easily doable.

I would get underneth and flex your suspension bushing well to see if you are developing play. Becasue of the weight of the truck, they seems to get dangerously worse rather quickly... at least that was my experience.