So I bent my rear drive shaft in my 2010 f150 4x4. Been trying to get a new one but that is proving to be more difficult than it should. Part number on drive shaft is non existent as no one can find it in the books. I've had 3 different driveshafts shipped in and all of them are shorter than the one I had in it. The best one I have gotten is an inch shorter than the one I took out. Can't find one that matches length perfectly. Is 1 inch shorter a big deal? Can I run it anyway?

 

There are shops that specialize in fabricating driveshafts, you just need to locate one closest to you. They will make the shaft to the exact length and balance it at the same time.
They may need the ends if they can't locate the end pieces.

 

Second hanky’s suggestion

A driveline service generally can re tube your bent unit cheaper than the cost of new. Turn around time is generally fairly quick too depending on shop work load..

 

This is where I have my work done.

Henderson Drive Line & Axle - Drive Line Auto Services | Westlake, OH