Table of Contents
Advertisement
7 8-28
1977 PONTlAC SERVICE MANUAL
2.
Depress speedometer retaining clip and slide gear
from mainshaft.
3. Remove rear bearing snap ring from mainshaft
groove.
4. Support reverse gear with press plates and press on
rear of mainshaft to remove reverse gear, thrust washer,
spring washer, rear bearing and snap ring from rear of
mainshaft.
5. Remove the 1st and Reverse sliding clutch hub snap
ring from the mainshaft and remove the clutch assembly, 1st
speed blocker ring and 1st speed gear from rear of the
mainshaft.
NOTE: Under certain tolerance conditions, it may be
necessary to press the synchronizer hub and gear from
the shaft.
CLEANING AND INSPECTION
Transmission Case
1. Wash the transmission thoroughly inside and outside
with cleaning solvent, then inspect the case for cracks.
2.
Check the front and rear faces for burrs and, if present,
dress them off with a fine mill file.
3. Check bearing bores in case and, if damaged, replace
case.
Fig. 76-24 Removing Drive Gear Bearing
Front and Rear Bearings
1. Wash the front and rear ball bearings thoroughly in
a cleaning solvent.
2.
Blow out bearings with compressed air.
CAUTION: Do not allow the bearings to spin,
turn them slowly by hand. Spinning beanngs will
damage the race and balls.
3. Make sure beanngs are clean, then lubricate
with light engine oil and check them for roughness
by slowly turning the race by hand.
Bearing Rollers
Fig. 76-25 Extension Rear Bearing Snap Ring
Fig. 76-26 Removing Reverse ldler Shafi
All clutch gear and countergear bearing rollers should
be inspected closely and replaced if they show wear. Inspect
counter shaft and reverse idler shaft at the same time, replace
if necessary. Replace all worn washers.
Gears
1. Inspect all gears for excessive wear, chips or cracks
and replace any that are worn or damaged.
2. Inspect reverse gear bushing and, if worn or damaged,
replace the entire gear.
NOTE: Reverse gear bushing is not serviced separately.
3. Check both clutch sleeves to see that they slide freely
on their hubs.
Reverse ldler Gear Bushing
The bushing, used in the idler gear, is pressed into the
gear and finished bored in place. This insures the positive
alignment of the bushing and shaft as well as proper meshing
of the gears. Because of the high degree of accuracy to which
these parts are machined, the bushing is not serviced
separately.
Advertisement
Table of Contents
