Yep . . I have trusted friends in the gear business. I'll have the 4.10 back within a week, and a test drive will tell me plenty. What concerns me most is what I'll find at the top, as I said. 55 is a sensible speed for an old truck, and I want to feel good there. I know that what I have in the SM, effectively, is a 3-speed road tranny with an emergency stump-puller boat ramp gear. I know, too, that there would be times I'd miss that low if I went to either of the NV's. I like goin' fishin', you see, and tire chains will be standard equipment. Even so, I think that it would be okay to slip a clutch judiciously on those rare occasions. But first the diff. Stand by . .