GMC 1982 Light Duty Truck, Руководство по обслуживанию, Страница: 981 / 1435

AUTO M ATIC T R A N SM ISSIO N S 7A-3
AUTOMATIC 350C TRANSMISSION
Pan R em oval......................................... 6.3 pts. (3.3 liters)
Overhaul...............................................20.0 pts. (9.5 liters)
AUTOMATIC 400 TRANSMISSION
Pan R em oval.......................................... 9.0 pts. (4.0 liters)
Overhaul............................................ 22.0 pts. (10.0 liters)
AUTOMATIC 700-4R TRANSMISSION
Pan R em oval....................................... 10.0 pts. (4.7 liters)
Overhaul............................................ 23.0 pts. (10.9 liters)
Fig. 7A-4--Transmission Fluid Capacity
Fluid Level an d C ap acity
To bring fluid level from A D D m ark to F U L L m ark
requires one pint (.5 liters) of fluid. Fluid level should be
checked a t every engine oil change.
Fluid level should be to F U L L M ark w ith transm ission
fluid a t norm al operating te m p era tu re 200°F (93°C ). W ith
fluid a t room te m p e ra tu re , 70 °F (2 1 °C ) level will be
betw een th e two dim ples on th e d ipstick. T he norm al
operating tem p eratu re is obtained only after at least 15
miles (24 km) of highway type driving.
Checking an d A dding Fluid (Transmission a t
O p e ra tin g Tem perature)
T he au to m atic transm ission is designed to operate at
th e " F U L L H O T " m ark on th e d ip stick a t norm al
operating tem p eratu res of 190° - 200°F (88°C - 93°C) and
should be checked under these conditions. T he norm al
operating tem p eratu re is obtained only afte r at least 15
miles of highw ay type driving.
To determ ine proper level, proceed as follows:
1. Apply parking brake and block vehicle wheels.
2. W ith the selector lever in the PA R K position, sta rt
engine. D O N O T R A C E E N G IN E . Move selector
lever through each range.
3. Im m e d iately check fluid w ith the selector lever in
PA R K , engine running at S L O W ID L E and the car on
a L E V E L surface. T he fluid level on the dipstick should
be at the " FU L L H O T " m ark.
4. If additional fluid is required, add sufficient fluid to
bring to the " F U L L H O T " m ark on the dipstick.
Checking an d A dd ing Fluid (Transmission at
Room T em p e ra tu re 6 5 ° to
8 5 °F , 18° to 2 9 °C)
A u to m a tic tran sm issio n a re freq u en tly overfilled
because the fluid level is checked when the fluid is cold and
the dipstick indicates fluid should be added. However, the
low reading is norm al since the level will rise as the fluid
tem p eratu re increases. A level change of over 19.05mm (3/
4 " ) will occur as fluid tem p eratu re rises from 60° to 180°F
(16° to 82°C) (F igure 7A-5).
Overfilling can cause foam ing and loss of fluid through
the vent. Slippage and transm ission failure can result.
Fluid level too low can cause slipping, particularly,
when the transm ission is cold or the vehicle is on a hill.
Check the transm ission fluid level with the engine
running, the shift lever in park, and the vehicle level.
If the vehicle has recen tly been o p erated for an
extended period at high speed or in city traffic in hot w eather
or the vehicle is being used to pull a trailer, an accu rate fluid
level cannot be determ ined until the fluid has cooled down,
usually about 30 m inutes after the vehicle has been parked.
Remove the dipstick and touch the transm ission end of
the dipstick cautiously to find out if the fluid is cool, w arm or
hot.
W ipe it clean and re-insert until cap seats. Remove
dipstick and note reading.
1. If the fluid feels cool, about room tem perature, (65Q to
85°F or 18° to 29°C ), the level should be between the
two dimples below the " a d d " m ark.
2. If it feels w arm , the level should be close to the "A D D "
m ark (either above or below).
3. If it feels hot (cannot be held com fortably), the level
should be between the "A D D " and " F U L L " m arks.
C h an g in g Fluid
1. Raise vehicle.
2. W ith drain pan placed under transm ission oil pan,
remove oil pan attac h in g bolts from front and side of
pan.
3. Loosen rear pan attach in g bolts approxim ately four (4)
turns.
4. C a re fu lly pry tran sm issio n oil pan loose w ith
screwdriver, allowing fluid to drain.
5. Rem ove rem ain in g bolts and rem ove oil pan and