When I try to slide it up on there its not only that teeth count are less on the driveshaft, but the overall size of the nub on the T56 is too big for the driveshaft's nub to slide onto it.
31 Spline. Looks like according to D&D it is in fact a Magnum. Hmm great for the customer but omg a pain for me. Wow the punches keep rolling. At least Troy here sent me a driveshaft I can hack up. thanks again Troy.
There is no way this is a magnum t-56. As stated in my original add this was an early mexican built version of the t-56. It might have a better output shaft but it's only rated for 450lb-ft of Tq. In my original add I stated that is why I replaced it with a magnum, because my motor was going to far exceed that 450. If you look at the shifter housing a magnum shifter uses 6 bolts. Stock t-56 only uses 4. It has four. I saw you post today and just wanted you to be clear on what you bought. This is not a magnum...
Congratz on getting her fired up! Ps
That was me that upgraded the throw out bearing sleeve. It's a bran spanking new ford racing piece.