Table of Contents
Advertisement
Replacing Transmission Oil Filter
Final Drive Cover Removal
available from your GMC Motorhome dealer or
local service station .
Automatic transmissions are frequently over-
filled because the fluid level is checked when the
fluid is cold and the dipstick indicates fluid
should be added . However, the low reading is
normal since the level will rise as the fluid tem-
perature increases. A level change of over 3/a inch
will occur as fluid temperature rises from 60°F .
to 180°F. (16°C. to 82°C.) .
Overfilling can cause foaming and loss of fluid
through the vent. Slippage and transmission fail-
ure can result .
Fluid level too low can cause slipping, par-
ticularly, when the transmission is cold or the car
is on a hill .
NOTE : If the vehicle has recently been oper-
ated for an extended period at high speed or in
city traffic in hot weather or the vehicle is being
used to pull a trailer. an accurate fluid level can-
80
not be determined until the fluid has cooled
down-usually about 30 minutes after the ve-
hicle has been parked .)
Check the fluid level at each engine oil change
period.
1 . Drive vehicle several miles, making fre-
quent starts and stops, to bring transmission
up to normal operating temperature (approx .
190-200 0 F.) (88-93 0 C .) .
2 . Park vehicle on a level surface.
3 . Apply parking brake.
4. Place selector lever in "PARK" and leave
engine running.
5 . Open all but the two rear windows, then
remove engine cover.
6 . Remove dipstick and wipe clean.
7 . Reinsert dipstick until cap seats.
8 . Remove dipstick and note reading.
If fluid level is at or below the "ADD" mark,
add sufficient fluid to raise the level to the
"FULL" mark. One pint raises the level from
"ADD" to "FULL." Do not overfill . Refer to
the Maintenance Schedule folder for servicing
interval.
TRANSMISSION OIL AND
FILTER REPLACEMENT
NOTE: Have a drain pan ready as lubricant
will begin to drain as bolts are loosened .
1 . Remove (13) bottom pan attaching screws .
2 . Remove bottom pan and discard gasket .
3 . Remove and discard oil filter assembly .
4 . Install new O-ring seal on new filter and
intake pipe and filter assembly and install .
5 . Using a new pan gasket, install pan. Torque
attaching screws to 12 foot-pounds .
6 . Add four (4) quarts of DEXRON® II
automatic transmission fluid and check fluid as
noted above.
FINAL DRIVE
FINAL DRIVE LUBRICANT REPLACEMENT
1 . Remove (10) cover attaching bolts. Have
a drain pan ready as lubricant will begin to drain
as bolts are loosened.
Advertisement
Table of Contents
