Drive shaft installation

[DoubleFrame]

I just changed the transmission on my truck from the T310 to Eaton Fuller 8LL and Would it be OK for me to leave this like this or do I need to extend the driveshaft?

[DoubleFrame]

The driveshaft moved 2 inches forward. The lines on the shaft and the lines on the slip yolk are flush or flat against each other. They are 4 inches of spline inside of the slip yolk.

[Geoff Weeks]

The question is what happens at the "worse case" situation where the shaft is fully extended by the suspension travel and the torque.  A lot depends on the suspension used.  

expecting 2" difference to be absorbed by the slip yoke is asking a lot. It might work or the shaft may come out at the worse possible moment.

Normally you measure the length needed with the truck on a level floor, suspension aired up, the shaft maker sets the slip yoke at the mid point with that measurement allowing for slip in either direction.  

Right now you are at the extended extreme, and have no more room for movement longer should the suspension require it. 

[Joey Mack]

It looks sketchy to me.  If you put the frame on tall stands and jack the front drive axle up to the stops, what does it look like ?   

GW makes good points