Chevrolet 70 1969 Series, Shop Manual

Page: 755 / 913

TRANSMISSION AND CLUTCH 7-9
F ig u re 1 0 — In s ta llin g M a in s h a f t R e a r B e a r in g R e t a in e r O il S e a l (T yp ica l)
------ ^ y l \ C l l
T ’S
Retainer
B e a rin g A ss e m b ly
F ig u re 1 1 — C o u n t e r s h a f t R e a r B e a r in g a n d R e ta in e r A s s e m b le d
INSPECTION
1. Inspect all parts for discoloration or warping due to
heat.
2. Examine all gear teeth and splines for chipped, worn,
broken, or nicked teeth or splines. Small nicks or
burrs may be removed with a fine abrasive stone.
3. Inspect the breather assembly to see that it is open
and not damaged.
4. Check all threaded parts for damaged, stripped, or
crossed threads.
5. Replace all gaskets, oil seals, and snap rings.
6. Examine housings, retainers, and covers for cracks or
other damage. Since repairs by welding, brazing, etc.,
are not recommended, replace damaged parts.
7. Check countershaft key and keyway for condition and
fit.
8. Inspect shift forks for wear, distortion, or other dam ­
age.
9. Check detent ball springs for free length, compressed
length, distortion, or collapsed coils.
10. Inspect thrust washers, stop rings, and spacers for
wear or damage.
11. Check fit of bearings on their respective shafts and
in their bores. Inspect bearings, shafts, and case for
wear. If installation of a new bearing does not correct
conditions, install new shafts or replace the case.
12. M ake sure synchronizer sliding clutch slides freely
on clutch gear. Check pins on synchronizer inner stop
rings for straightness and tightness.
13. Inspect all bearing rollers for pitting or galling.
14. Examine detent balls and interlock balls for corro­
sion or brinneling. If shift lever shaft detents show
signs of wear, replace them.
15. Replace all worn or damaged parts. When assem­
bling the transmission, coat all moving parts with lu­
bricant recommended in L U B R IC A T IO N (SEC.
10) of this manual.
REPAIR
Mainshaft Rear Bearing Retainer Oil Seal Replacement
1. Using a punch or chisel, drive oil seal (44) out of
mainshaft rear bearing retainer (45). Discard oil seal.
2. Using tool J-6416 as shown in Figure 10 press or
drive new oil seal (44) into bore of retainer (45). Press
oil seal into bore of retainer until it bottoms.
NOTE: Coat outer diameter of oil seal with a
light coat of sealing cement. Wipe off excess ce­
ment. Lip of oil seal goes toward front of re­
tainer.
Countershaft Rear Bearing
Inspection and Replacement (Fig. 11)
1. On model 540GL transmission, inspect bearing as-
Slid e H a m m e r
B e a rin g R e m over
F ig u re 1 2 — R e m o v in g C o u n t e r s h a f t R e a r
B e a r in g fr o m R e ta in e r
CHEVROLET SERIES 70-80 H EAVY DUTY TRUCK SH O P M A N U A L