I posted this in transmission a couple of days ago but I got no response...maybe I will here:

I just purchased a TKO-600 kit for my new powertrain buildup. It's coming with a driveshaft and they need to know what type of U-joints (1330, 1350, etc). I don't have the new rear-end yet but I know it is going to be a 12-bolt with a 4.11 posi. Do those use specific U-joints or what sort of things do I have to find out to give them that information. Thanks.

You will probably have to ask them what yokes they are supplying or specify what yokes you wish to receive along with the driveshaft configuration. If you can use the 1350's they are the strongest from what I understand. I think I'm running 1330's in my setup but I'm running a slushbox. You will probably want the stoutest u-joints you can run with the manual trans. If you are going to put slicks on it for a trip to the track you probably want to opt for the solid u-joints as opposed to the greasable types.

I'm no expert but I think that's pretty close to the facts.

Troy.

If you get a slip yoke and pinion yoke for the 1350s you'll be better off.I use them in my car and believe me when I say they take a beating,they haven't given up yet after many years of abuse.......they are the Spicer variety :cool:

What I'm wondering is, can I go ahead an order the driveshaft with 1350 joints anyway, and if I discover my rear-end has a different type of joint, can I just replace the U-joint on the rear-end to match the driveshaft?

I'm pretty sure you can.

1310 is the stock size. If you use the stock size, at least use the greaseless Spicer. If you'll be racing this buggy on slicks now and again, I would go through the hassle of upgrading the pinion yoke to a 1330 or 1350 size. I would NOT use a reduction ujoint on the back end there. Too much twist going on there for sure. These big ujoints you can have grease fittings in, they're big enough. The 1350 is overkill, but a question I asked some time ago was what is the downside, thinking that at highway speeds, ( important to me) with the driveshaft spinning at 3000 rpms, they might create more vibration. Nope.

Sure wish had bitten the bullet when I had my Denny's HD shaft made up ( the stocker was FUBAR'd). I simply went with stocker, greaseless 1310 Spicer's. Now my rear yoke is a bit hammered. Might have been for a while.

It's slick launching and hard pwoershifting that'll do it. If you have either of those in the plans, spend the $70 on a 1350 rear pinion yoke and swap it in now while the rear is out of the car.

If this is a rare street tire racer, then I don't know. 1310s might be fine. Greaseless though.