The Service Manual instructions did not satisfy me to do a linkage adjustment. There are 2 places you can access the linkage cable: under the battery and the 3" lever under the seat at the front of the Tranny. The lever has very definite "stops" at its different positions. In terms of adjustment, the most important one is the last one (Low Range). If this one is adjusted properly, all the rest should be as well.
There is simply a cotter pin securing the cable-end to the 3" lever. Disconnect the cable-end, put the lever and the cable-end independently in the Low position. The lever shaft should align with the hole of the cable-end. There is no adjustment at this end of the cable, so adjustment must be done under the battery. There, it's easiest to use a 19 MM open-end wrench and a pair of needle-nose ViceGrips. Use the wrench on the lower nut and the ViceGrips where needed. Adjust the cable to positively push the lever into the Low Range position. If the rest of the lever positions don't coincide with the cut-out on the dash, you've got bigger problems. Finally, use a Q-tip to grease the edges of the dash cut-out. You're good to go.