REAR AXLE DIFFERENTIAL CARRIER 4-9
12.
13. 14.
T urn adjusting nut clockwise while oscillating tool until a noticeable drag is produced (bearing outer race ro tates with tool). Remove tool and measure the thickness of the gauging plate in a minimum of three places (fig. 23A). Average these readings and record results. T urn ring gear 90 degrees and repeat Steps 11 and 12. The thickness of the service shim is determined as in Step 9, however, an additional .008" must be added to obtain proper side bearing preload. EXAM PLE: G au ge thickness (h ig h er re a d in g ) .................................................. 226" Service sp acer used D iffe re n c e ......................................................... 056" P r e lo a d .......................................................... plu s .008" Service shim size (righ t s id e )........................................................ 064"
Fig. 2 2 A -D e te rm in in g Service Shim Size
NOTE: Service shims are available in increments of .002” -if the shim measurement falls between the available shims, select a shim thinner by .001".
6.
Tighten lock bolt on side of the tool then remove tool.
7.
Using a m icrom eter, m easure the thickness of the gaug ing plates in a m inim um o f three places (fig. 2 3A). Average these readings and record result.
15.
Install the selected shim between the service spacer and bearing, using a soft-face ham m er (fig. 24).
8.
T urn ring gear 90 degrees and repeat Steps 5, 6 and 7.
16.
9.
T h e th ic k n e ss o f the service shim is d e te rm in e d by su b tra c tin g th e th ick n ess o f th e service sp acer from th e h ig h e r o f th e tw o a v e ra g e d re a d in g s o b ta in e d in ste p s 7 a n d 8.
Install right bearing cap and torque both bearing caps to specifications. M ount a dial indicator on the carrier and check backlash between ring gear and pinion (fig. 25A). Backlash should be within the range of .003" to .010" with a reading of .005" to .008" preferred. Check reading at four equally spaced positions around the ring gear. Variation in reading should not exceed .002".
10.
11.
EXAM PLE: G a u g e thickness (h ig h er re a d in g ) ...................... 254" Service sp a c e r used Service shim size (left s id e ).................................. 084" Install the selected shim between the service spacer and bearing. Remove strap J-22779-6 and install left bearing cap. Torque bearing cap bolts to specifications. Remove right-hand bearing cap and install Tool J22779 between right bearing cup and carrier housing.
Fig. 2 3 A -M e a su rin g Gauge Plate Thickness
NOTE: Position the dial indicator so that indicator button is perpendicular to tooth angle and in line with gear rotation. If variation in backlash exceeds .002" measure ring gear and case runout as shown in Figure 26A. G ear runout should not exceed .002"; should runout exceed this limit, check ring
Fig. 2 4 A -ln s ta llin g D ifferential Shim
CHEVROLET OVERHAUL MANUAL
