Driveshaft will not engage with output shaft

[FTA1995]

Just got my new t56, the output shaft is appropriately splined for the driveshaft yoke, but I can't get it in much past the seal before I hit a solid resistance. I think it's caused by the copper-ish looking bushing right behind the seal farther up along the output shaft. Any idea's? Would I be ok to sand the driveshaft yoke with some relatively high grit to clear the bushing?

[FTA1995]

Nothing? The yoke is about a 64th of an inch too large, if that.

[Joe 1320]

The yoke should be able to slide in and out with relative ease. This is needed to allow for differential and rear suspension movement and changes in pinion angle. Who rebuilt your transmission or is it brand new?

[FTA1995]

It's new, just came back to repost; the yoke was warped (probably) into the thousandths, and after a few hours of resurfacing finally slipped past the bushing.

Valid point with the sliding freeplay needed when the rear suspension compresses, that's why I didn't just jam the thing in there. Even if I did, the bushing type in there has rifling in it to pull any worn materials out.

For reference too, when I started the yoke would hit the bushing and stop completely. Now it will fully engage like it's supposed to.

Off to drop the trans for the 2nd time this month. Depending on the condition after I rebuild the old one, I will have either good components or a full trans to sell if anyone needs parts.

Thanks Joe