Chevrolet 70 1969 Series, Shop Manual

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TRANSMISSION AN D CLUTCH 7-79
5-SPEED TRANSMISSIONS
(SPICER MODELS 5652, 5752C)
TRANSMISSION OVERHAUL
INDEX
Subject Page No.
General Inform ation ...................................................................7-79
T ro u b lesh o o tin g ...............................................................................7-79
Disassembly Into Subassem blies .........................................7-84
Disassembly of Subassem blies ..............................................7-87
Subject Page No.
Inspection ........................................................................................... 7-89
Assembly of S u b assem b lies.....................................................7-90
Assembly of Transm ission ...................................................... 7-92
Specifications ...................................................................................7-94
GENERAL INFORMATION
DESCRIPTION
The Spicer Models 5652, and 5752C transmissions (fig.
1) covered by this m anual are 5-speed synchrom esh helical
gear-type design with direct drive in 5th speed. E n­
gagem ent of all gears, except first and reverse, is aided by
sleeve type synchronizers. W ith the exception of first and
reverse gears and reverse idler gear, all gears are of heli­
cal design.
The main drive gear bearing is a single row ball type.
M ainshaft is supported by fourteen pilot bearing rollers at
front end and by a single row ball bearing at the rear end.
The countershaft is supported by a straight roller bearing
at the front and by a single row ball bearing at the rear.
The reverse idler gear rotates on two sleeve-type roller
bearings.
PRELIMINARY OPERATIONS
In addition to norm al shop equipm ent (hand tools,
arbor press, etc.), various special tools are needed to facil­
itate overhaul of the transm issions covered by this m an u ­
al. References are m ade to the use of these tools through­
out the m anual. A com plete list is given under S P E C IA L
T O O L S, found at the end of this m anual.
Cleanliness is extrem ely im po rtant and an absolute
m ust when repairing or overhauling the transmission. Be­
fore attem pting overhaul procedures, thoroughly clean ex­
terior of the transmission with steam or cleaning solvent
to prevent dirt from getting into the gear m echanism .
IM P O R T A N T
O n tran sm issio n s w ith a con ve n tio n al g e a r ­
shift lever, reinstall the control to w e r (1 1 , fig.
1) prior to c le a n in g o f the transm ission.
Drain lubricant from transmission case, providing
this operation was not perform ed when the transm is­
sion was removed from the vehicle.
The transmission should be overhauled in the se­
quence outlined, unless only one particular area is to
be worked on.
TROUBLESHOOTING
The following trouble shooting inform ation will as­
sist in locating transmission troubles, but in addition
will serve as a guide to find the “ cause” to prevent
reoccurrence.
W henever possible, road test the vehicle prior to
overhaul. M echanics usually get second or third hand
reports of trouble experienced with the unit and these
reports do not always accurately describe the actual
conditions. Som etim es sym ptom s seem to indicate
trouble in the transm ission; while, actually the
trouble m ay be caused by the axle, propeller shaft,
universal joints, engine or clutch. Therefore, before
removing transmission or related com ponents to lo­
cate trouble, always road test to check possibility
that trouble may exist in other closely associated
units. If the m echanic can drive, road testing will be
m ore effective; however, just riding can be very in­
formative.
If rem ote controls are used, a careful check of the
rem ote and connecting linkage to transmission and
CHEVROLET SERIES 70-80 H EAVY DUTY TRUCK SH O P M A N U A L