suitable hone. Inspect shafts to make certain they are
bearing to avoid spinning. Do not spin bearings when
not sprung, bent, Or splines twisted, and that shafts
drying. Bearings may be rotated slowly by hand to facili-
are true.
tate drying process.
Housings
Housing, Covers, etc.
Clean interior and exterior of housings, bearing caps,
Inspect housings, covers and bearing caps to be certain
etc., thoroughly. Cast parts may be cleaned in hot solu-
they are thoroughly cleaned and that mating surfaces,
tion tanks with mild alkali solutions providing these parts do
bearing bores, etc., are free from nicks or burrs. Check all
not have ground or polished surfaces. Parts should remain
ports carefully for evidence of cracks or condition which
in solution long enough to be thoroughly cleaned and
would cause subsequent oil leaks or failures.
heated. This will aid the evaporation of the cleaning solu-
tion and rinse water. Parts cleaned in solution tanks must
be thoroughly rinsed with clean water to remove all traces
of alkali. Cost parts may also be cleaned with steam
cleaner.
REASSEMBLY OF TRANSMISSION
CAUTION: Care should be exercised to avoid inhalation
of vapors and skin rashes when using alkali cleaners.
Instructions given below on reassembly of compo-
All parts cleaned must be thoroughly dried immediately
nents of transmission assembly are given in the se-
by using moisture-free compressed air or soft, lintless ab-
quence that must be followed in rebuilding. Principle
sorbent wiping rags free of abrasive materials such as
of operations cited and views shown ore similar and
metal filings, contaminated oil or lapping compound.
parallel on all shafts. The various drive shafts are
INSPECTION
assembled in the following order:
The importance of careful and thorough inspection of
1. Second and Fourth Shaft-"A"
all parts cannot be averstressed. Replacement of all parts
2. First and Third Shaft-"B"
showing indication of wear or stress will eliminate costly
and avoidable failures at a later date.
3. Idler Shaft-"I"
4. Output Shaft-"O"
Bearings
Carefully inspect all rollers, cages and cups far wear,
5. Reverse Shaft-"R"
chipping or nicks to determine fitness of bearings for fur-
Input Shaft-Y"
6.
ther use. Do not replace a bearing cone or cup individually
without replacing the mating cup or cone at the same time.
After inspection, dip bearings in Automatic Transmis-
REASSEMBLY OF 2nd AND 4th SHAFT
sion Fluid and wrap in clean lintless cloth or paper to
protect them until installed,
Oil Seals, Gaskets, Etc.
Replacement of spring load oil seals, "O" rings, metal
sealing rings, gaskets and snap rings is more economical
when unit is disassembled than premature overhaul to re-
place these parts at a future time. Further loss of lubricant
through a worn seal may result in failure of other mare
expensive parts of the assembly. Sealing members should
be handled carefully, particularly when being instolled.
Cutting, scratching, or curling under of lip of seal seriously
impairs its efficiency. Apply a thin coat of Permatex
No. 2 on the outer diameter of the oil seal to assure
an oil tight fit into the retainer. When assembling new
metal type sealing rings, same should be lubricated
with coat of chassis grease to stabilize rings in their
grooves for ease of assembly of mating members.
Lubricate all "O" rings and seals with Automatic Trans-
mission Fluid before assembly.
Gears and Shafts
lf magna-flux process is available, use process to check
parts. Examine teeth on all gears carefully for wear,
Figure 64
pitting, chipping, nicks, crocks or scores. If gear teeth show
Install 4th speed bearing outer race locating ring (rear
spots where case hardening is worn through or crocked,
side of case).
replace with new gear. Small nicks may be removed with
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