Chevrolet 10 Series 1970, Service Manual

Page: 18 / 671

LUBRICATION 0 -16
sion is factory lu bricated and should not req u ire p erio d ic
lu brication. H ow ever, should the shifting e ffo r t becom e
noticeably g re a te r, lu bricate a ll linkage points with en­
gine o il.
A U T O M A T IC TRAN SM ISSIO NS
POWERGLIDE TR AN SM ISSIO N
E V E R Y 6000 M IL E S -C h e c k fluid le v e l on dipstick.
F or an accurate o il le v e l check, d riv e the veh icle se v e ra l
m ile s making frequent stops and starts to b rin g the tran s­
m ission up to norm al operating tem peratu re (approxi­
m ately 180°-190°F.). When checking the o il, park the
v e h icle on a le v e l su rface, place the s e le c to r le v e r in
" P a r k " and with the engine running, note reading. Add
o il only with the tran sm ission hot and the o il le v e l at the
ADD mark. The amount o f o il req u ired under these con­
ditions is one pint. DO NOT O V E R F IL L .
G en eral M otors D E X R O N ® Autom atic T ran sm ission
Fluid, P a r t numbers 1050568, 1050569, 1050570 which
has been e s p ecia lly form ulated and tested fo r use in your
autom atic tran sm ission is recom m ended. O ther Auto­
m atic T ran sm ission Fouids iden tified with the m ark
D E X R O N ® o r equivalent a re also recom m ended.
E v e ry 24,000 m ile s * * (m ore frequently, depending on
s e v e rity o f s e r v ic e , if v e h icle is used to pull tr a ile r s ,
c a r r y full loads during high ambient tem peratu res, op­
era te in mountainous te rra in o r operate under other
s e v e re conditions) —R em ove fluid fro m the transm ission
sump and add 2 quarts U.S. m easure (1-2/3 quarts Im ­
p e r ia l m easu re) o f fre s h fluid. O perate tran sm ission
through a ll ranges and check fluid le v e l as d escrib ed
above. It is not n ecessary to rem o ve the pan because a
drain plug is provided.
* * T h is recom m endation a p p lies only to 10 S e rie s M odels.
F o r 20-30 S e rie s M odels drain p erio d should be ev e ry
12,000 m iles.
P ow erglide Low Band A djustm ent
A t the fir s t tran sm ission fluid change, adjust the
P o w e rg lid e low band.
TURBO H YD R A -M A TIC 4 0 0 A N D TURBO
H YD R A -M A T IC 3 5 0
Lu brication o f your Tu rbo H yd ra-M atic w ill, except fo r
flu id capacity and filt e r change lis te d below , follow the
P o w e rg lid e tran sm ission recom m endations. A fte r check­
ing tran sm ission fluid le v e l it is im portant that the
dipstick be pushed a ll the way into the f ill tube.
E v e ry 24,000 m ile s —a fte r rem ovin g fluid fro m the
tran sm ission sump, add approxim ately 7.5 pints U.S.
m easu re (6.25 pints Im p eria l m easu re) fo r the Turbo
H yd ra -M a tic 400 and 2-1/2 qts. U.S. m easure (2 qts.
Im p eria l m easure) fo r the Turbo H yd ra-M atic 350 o f
fre s h fluid, to return le v e l to p rop er m ark on the
dipstick.
E v e r y 24,000 m ile s - t h e Turbo H yd ra-M atic 400 tran s­
m ission sump stra in er should be replaced.
ALLISON A U TO M A TIC TR AN SM ISSIO N
E v e ry 2000 m ile s the flu id le v e l should be checked and
fluid added as d escrib ed below . DO N O T O V E R F IL L .
A good grade o f 10W engine o il may be used tem po­
r a r ily in em ergen cies, but must be rep laced with D E X ­
RON
o r equivalent Autom atic T ra n sm ission Fluid as
soon as possible.
Checking Fluid
1. Start engine, set parking brake, m ove control le v e r
into a ll d riv e ranges to f ill a ll clutch ca vities and o il
passages and then to the neutral position. Run en­
gine at 1000 rpm until engine and tran sm ission have
reached norm al operating tem peratu re.
2. R em ove any d irt o r g ra v e l fro m area around indica­
tor in right side o f engine com partm ent. W ith engine
running at 1000 rpm rem o ve indicator fro m case,
wipe clean, re in s e rt and ca refu lly withdraw again.
C A UTIO N: E x e rc is e ca re to p reven t d irt from
entering f ille r tube when checking fluid le v e l.
Add fluid only when le v e l reach es L m ark (1 qt. low)
on the in d ica tor.
3. W ith engine operating at 1000 rpm add sufficient
D E X R O N ® o r equivalent Autom atic T ran sm ission
Fluid to bring le v e l to full m ark on indicator.
CA UTIO N: Fluid le v e l should n ever be higher
than " F ” m ark on indicator when fluid is at op­
eratin g tem peratu re. An e x c e s s iv e ly full tran s­
m ission w ill resu lt in aeration o f the fluid. The
expanding fluid may then be fo rced out o f the
f ille r tube. Sufficient fluid may be lo st to s e r i-
ously damage the transm ission.
4. R ein sta ll indicator and turn the cap 1/4 turn to lock.
Draining and Refilling
T ra n sm ission lubricant should be changed and the
f i l l e r replaced a fte r the fir s t 2,000 m ile s o f operation.
Drain, rep lace the filt e r , and r e f ill the transm ission
e v e ry 24,000 m ile s th erea fter if used in norm al highway
operation; e v e ry 6 months o r 12,000 m ile s , o r often er,
i f used fo r o ff highway operation, city stop-and-go s e r v ­
ice, o r other s e v e re s e r v ic e .
A p p roxim ately 9 qts.
(7-1/2 qts. Im p eria l m easure) o f fluid a re requ ired to
r e f ill the tran sm ission a fte r the pan has been drained.
D rain im m ediately a fter operation — while fluid is s till
w arm . Do not flush tran sm ission a fte r draining.
Transmission Controls
The brake re ta rd e r linkage and throttle va lv e linkage
fo r A llis o n Autom atic tran sm ission s should be lubricated
p e rio d ic a lly . Contact points between rods, id le rs , b ell
cranks and supports should be lu bricated with SAE 10
engine o il. A lubrication plug is p rovid ed in the A u x il­
ia r y 4 - speed shift tow er. Lu bricate e v e ry 6000 m ile s
with w ater resistan t E P chassis g re a s e which m eets
G en eral M otors S pecification #GM 6031M.
REAR AXLES
Check lubricant le v e l (including the in te r-a x le d iffe re n ­
tia l) e v e ry 6,000 m ile s . When n ecessary, r e fill to le v e l
o f f i lle r plug hole using "M u lt i- P u r p o s e " gea r lubricant
m eeting U.S. A rm y ORD. Spec. M IL -L -2 1 0 5 B as shown in
the " G e a r Lubricant V is c o s ity T a b le .”
D rain the lubricant e v e ry 24,000 m iles. I f the veh icle
is operated in exceptionally heavy w ork o r at continuous
CHEVROLET TRUCK SERVICE MANUAL