727 Question

fanofpetty said
Now think about that....if your using an incorrect slip-yoke (to short), that simply means that yoke is not on as much spline on the tailshaft. Buy using a slightly longer drive shaft, ( like your suggesting) to try and compensate, is not the proper way to correct this, as your making the yoke closer to the end of the tail shaft and can actually bottom out with suspension travel causing damage. I'v seen this happen. You should always use the correct specified drive shaft length for the car, and the correct length slip yoke.

I have thought about it and made precise measurements. Not just read stuff online and took it for granted. Think about this, lets say you have a yoke that goes farther into the trans. than another and you push it in and pull it out 1" and do that with another yoke that's 1/2" shorter how could the driveshaft bottom any easier? After all you've pushed both all the way in and pulled both out 1", right? You must not be aware but Chrysler used more than one length yoke from the factory. If you look down inside of different yokes you can see that some have the splines starting quicker, some start within 1/2" of the i.d. of the yoke, while others have an inch or more before the splines even start yet they both have approx. the same length of splines. I'm talking factory Mopar stuff, not aftermarket parts. Why Ma Mopar did that I don't know but I have seen it. Ask any GOOD driveline shop and they'll tell you there is no absolute rule that says a certain car has to have a certain length driveshaft because there are variables that can affect things.