The flange is the part the drive shaft bolts to. I have attached a couple of pic. The one pic side view....as you see, when the transmission starts to turn all the torque is right there at the connection point where the bolts connect the propeller shaft. The same on the rear part of the shaft where it connects. Anywhere it bolts, that is the torque point that is taking most of the initial twist.
The bolts/nuts can loosen over time.
Another example. Put your two hands together flat. Now twist one and keep on still.......one is the transmission (the one you are moving) and the other is the propeller shaft (the one not moving). Now put a pencil between your fingers simulating a bolt. Now twist again and don't move the other hand. The pencil twists. Same thing on your shaft......the bolts are taking that initial twist and transferring it to the stationary hand or shaft.......thus over time could loosen.
I have attached the torque value
General info on how to torque
a. Temporarily tighten the propeller shaft bolts and 2 universal joint washers.
If reusing the bolts, apply engine oil to the bolt before use.
b. Using a screwdriver or an equivalent, hold the transfer companion flange.
c. Using a socket hexagon wrench, fully tighten the propeller shaft bolts
Hope that helps.
Friday, March 20th, 2009 AT 8:15 PM