The yokes must be within 3 degrees (0 being best) of each other. Think parallel.
The drive shaft (down) angle from rear axle to transfer case yoke should not exceed 13 degrees. If either the 3 degrees or 13 degrees are exceeded you need to use a CV style rear driveshaft with the differential yoke aimed 1-2 degrees below the transfer case yoke center.
JAF
The drive shaft (down) angle from rear axle to transfer case yoke should not exceed 13 degrees. If either the 3 degrees or 13 degrees are exceeded you need to use a CV style rear driveshaft with the differential yoke aimed 1-2 degrees below the transfer case yoke center.
JAF