GMC 1989 Light Duty Truck Repair Manual page 209

Figure 63— Master Pinion Block
D-115 Scooter Gage (Miller)
1. Clean the carrier bores and all the tools. The pinion
bore must be free of nicks and dirt.
2. Install D-120 or D-137 to the pinion bore (figure 63).
3. Place D-116-2 onto D-115-3 (figure 64).
4. Install the arbor and discs into the axle housing.
5. Install D-116-1 onto D-120 and against the arbor
(figure 65).
6. Place D-115 onto the height block (figure 66).
• Place the gage on the upper step of the height
block. Push the gage down on the height
block. While applying pressure, set the dial
indicator at zero.
7. Slide the gage over the arbor (figure 67).
8. R ecord the re a d in g at th e p o in t of g re a te s t
d e fle c tio n (when the dial in d ic a to r needle is
centered between movement to the left and to the
Figure 6 4 — A rb or and Discs
DANA REAR AXLES 4B5-21
Figure 66— Scooter Gage on the Height Block