Why 4.1 axle?

valhalla360 wrote:

JRscooby wrote:

No matter how the weight compares to the rating, for a given weight, all other things equal, a higher numerical rear end ratio will put less strain on the rear end housing, the rest of drive line, and the part of the frame that joins engine to rearend. This is the reason the manufacturers change the ratio when they change the rating.

Sure, a higher load will add more stress but...

Carry a 5lb bag instead of a 3lb bag will put more strain on your arms..but a 5lb bag is well within the load carrying capability of your average healthy human...so the fact that it puts more strain on your arms is largely irrelevant moving the bag 50ft. You can pick just about any healthy human (and a lot of not so healthy humans) to get the job done.

Now if you are asking someone to carry a 200lb bag 50ft...that does exceed the capability of many humans but some could handle it without difficulty. If you need to move a 200lb bag 50ft, you want to upgrade to a stronger human.

Same here...as long as you are within ratings, the extra strain has negligible effect on the drive-train.

I don't how to get this idea between your ears. You say If in ratings you will not over stress things. This is true! No disagreement from me. The OP asks why 4.1. The point you act like you do not understand is Because the lower speed gears reduce stress on the rest of vehicle they can increase the ratings!
Still need to tow in the ratings to keep the stresses at acceptable level, but the ratings are higher.