Chevrolet 10 series 1973, Overhaul Manual

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7 M - 3 4 CLUTCHES A N D M A N U A L T R A N S M I S S I O N S
DETENT
BALL
Fig. lOES-Removing Rear Bearing Retainer
6. Install shift fork.
NOTE: Do not drive the shifter shaft lock
pin into place until the extension has been
installed on the transmission case.
Extension Oil Seal Or Bushing
If bushing in rear of extension requires replacement,
remove oil seal and use Tool J-21424-9 to drive bushing
into case extension. Using the same tool, drive new
bushing in from the rear. Coat I.D. of bushing with
transmission lubricant, then install new oil seal using
Tool J-21359. Prelubricate seal between lips with cup
grease.
Clutch Keys and Springs Replacem ent
NOTE: The clutch hubs and sliding sleeves
are a select fit assembly and should be kept
together as originally assembled, but the
three keys and two springs may be replaced
if worn or broken.
1. Push the hub from the sliding sleeve. The keys will
fall free and the springs may be easily removed.
2. Place the two springs in position (one on each side
of the hub), so all three keys are engaged by both
springs. Place the keys in position and, holding
them in place, slide the hub into the sleeve.
NOTE: The sleeve with the large square edge
opposite the fork groove identifies the 3-4
synchronizer sleeve.
ASSEMBLY OF M A IN S H A FT
1. From the rear of the mainshaft, assemble the secon
speed gear (with hub of gear toward rear of shaft).
2. Install 1-2 synchronizer clutch assembly to main­
shaft (sliding clutch sleeve taper toward the rear,
hub to the front); together with a synchronizing
Fig. l l B - l n s t a l l i n g Reverse Shifter Shaft and Detent
Ball
ring on either side of clutch assembly so their
keyways line up with the clutch keys (fig. 12B).
3. Press the 1st gear sleeve onto the mainshaft using a
1 3/4" I.D. pipe cut to a convenient length or other
suitable tool.
4. Install the first speed gear (with hub toward front)
and using 1 5/8" I.D. pipe cut to a suitable length,
press on the rear bearing (fig. 13B).
5. Choose the correct selective fit snap ring (.087",
.090", .093", or .096") and install it in the groove in
mainshaft behind the rear bearing. With proper
ring, maximum distance between snap ring and
rear face of bearing will be from zero to .005".
NOTE: Always use new snap rings when
reassembling transmission and do not expand
the snap ring further than is necessary for
assembly.
Fig. 12B-Installing Synchronizing Ring
CLUTCH
KEY
OVERHAUL MANUAL