With the R200A (front diff) the weak link isn't the diff, it is the drive axles. The CV joints don't hold up well in any IFS under duress. They are basically front wheel drive automobile parts although a little stronger than that. They also don't take well to to stiff angles. That's one of the reasons I chose the SLR kit. It may not drop the diff a lot, but it is better than nothing. Especially when lockers and larger tires are factored in.