I contacted rancho about this the reply from technical support is you can jack the vehicle up under the glide plate but the floor jack should be below the differential housing itself so the weight will be directly transferred to the glide plate and thus the differential housing.I understand that Jacking the car up directly on the pumpkin is not the greatest idea. What if it has a rancho differential glide plate, is that any safer?
Gosh! This reminds me that I don’t think that I have even seen a phone book in the better part of a decade. Do they still drop them at your door step?This is a great use for those phone books they send out. I've been using the same one for about 10 years now.
I wrap it in duct tape so it doesn't fall apart.