3-42
GZ276
6. Remove two cap screws securing the oil pump in
the crankcase and remove the oil pump.
GZ305
7. Remove the driveshaft (G); then remove the coun-
tershaft assembly (with shift forks) (H). Account
for three flat washers on the countershaft.
GZ280A
8. Remove the reverse idler gear (H), shaft bushing,
and two washers.
GZ279
NOTE: Do not disassemble the countershaft
assembly unless necessary. If necessary, see Ser-
vicing Center Crankcase Components sub-sec-
tion.
Servicing Center
Crankcase Components
NOTE: Whenever a part is worn excessively,
cracked, damaged in any way, or out of tolerance,
replacement is necessary.
SECONDARY GEARS
NOTE: When checking and correcting secondary
gear backlash and tooth contact, the universal
joint must be secured to the front shaft or false
measurements will occur.
Checking Backlash
NOTE: The rear shaft and bevel gear must be
removed for this procedure. Also, always start with
the original shims on the rear shaft.
1. Place the left-side crankcase cover onto the
left-side crankcase half to prevent runout of the
secondary transmission output shaft.
2. Install the secondary driven output shaft assembly
onto the crankcase.
3. Mount the dial indicator so the tip is contacting a
tooth on the secondary driven bevel gear.
4. While rocking the driven bevel gear back and
forth, note the maximum backlash reading on the
gauge.
5. Acceptable backlash range is 0.05-0.33 mm
(0.002-0.013 in.).
Correcting Backlash
NOTE: If backlash measurement is within the
acceptable range, no correction is necessary.
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