GMC 1982 Light Duty Truck Service Manual page 411

A L IG N M E N T
KEY
Fig. 4A-18-Alignm ent Key
d. Install dust shield over shaft, small diameter. Install
bearing retainer.
e. Install rubber cushion onto bearing.
f. Install bracket onto cushion.
g. Install retaining strap.
Installation of Propshafts
NOTICE: W hen reinstalling propshafts, it is necessary
to place the shafts into particular positions to assure
proper operation. This is called phasing.
NOTICE:
key, as shown in figure 4 A - 18, to obtain proper phasing.
The shafts can mate only in the correct position.
NOTICE: G
as shown in figure 4 A - 19.
1. For models with one piece propeller shafts, slide shaft
into transmission and attach rear U-joint to axle.
On C models, equipped with automatic transmission
only,
2-Piece prop shaft must be
assembled as follows to prevent
excessive drive line excitation:
1. Transmission yoke must first
be placed in vertical position.
2. Front yoke of Rear Prop
shaft is set horizontal as shown.
Fig. 4 A -1 9 -A lig n m e n t fo r Phasing
PROPELLER SHAFT
All models with 32 splines
and K models with 16 splines
4 A -9
use an alignment
must be phased