.....I will have to find the catalog. And yes, I could be mistaken but I don't think so as I've looked at the catalog many times. I'm like 100% sure! Pack rat isn't the word for it! I never throw anything away!!! {unless, it's something that I end up needing later!!!}..... I'll look & if I can't find it I'll errase these posts. That's only fair to them no matter how sure I am of what I read..... It just REALLY upset me as I had a driveline shop rebuilt my modular iron center section w/ a true track that was set up for 31 spline axles. I took it in the shop yesterday to have them itstall it & build a stronger driveshaft. Then I get a call from them this am r/e "you have 28 spline axles"..... thanks, Bill