What would cause a shudder under load

dannydimitt wrote:

dannydimitt wrote:
the shorter the drive shaft becomes , the possibility of a driveline shudder
increases . The degree of angle of the output shaft needs to be VERY close to the same angle of the pinion shaft on the rear end. This can be done using an inexpensive angle gauge from the home depot or other places . If the truck has leaf springs in the rear the angle of the pinion can fairly easily be changed with the use of simple wedges available through e-bay , amazon or parts houses,placed between the axle mounting plate and the leaf spring.
I had the same problem with a Jeep Cherokee that came from the factory doing this and was finally fixed by myself when I learned of this procedure

Good luck,

Here is the part # for the angle finder I used
Swanson tools part # AF006M