I have found the perfect tubing for toyota driveshafts. I'm a machinist and when I done my first dual t-case I was digging in the stock rack at work for some heavy wall tubing to build my driveshafts with and it just so happened that I found some .156" wall seamless tubing that is almost exactly the same ID as a factory toyota driveshaft. Toyota driveshaft ID is 2.443 and this tubing is 2.438 ID. Thats only .005" difference so even if you don't have access to a lathe you can just use a die ginder on the ID to get your yokes to fit. Just don't expect it not to vibrate unless you put it in a lathe and make sure it's running true before you weld it, but I see people booty fab driveshafts all the time so I guess some people don't care if it's straight.

Here's the spec for it: ASTM A513 TYPE 5 HT-852649 ERW MT-1026 2.750 OD x 2.438 ID

This is some extremely strong stuff. I have built about 10 driveshafts out of this and have yet to see anyone even put a dent in it. I have seen someone bend a MC long spline slip yoke , break the ears off a yoke, and I hit mine so hard on a rock ledge that it knocked the u-joint cap out of my rear yoke. All of this and still no damage to the tubing.

I don't know where you can get it or what it will cost. I found a surplus of it left over from a job we ran, so needless to say it went home with me.

Something strange about this tubing is that it read on the side of it: "used for drilling of oil and gas" I'm not sure what it is, but someone told me it was used as drill shaft for drilling oil wells ?? I'm not sure , maybe someone out there knows what that means. All I know is that it works perfect for toyota driveshafts.