Chevrolet 70 1969 Series, Shop Manual

Page: 822 / 913

TRANSMISSION AND CLUTCH 7-76
SPECIFICATIONS
G E N E R A L D A T A
M a k e ..................................................... Clark 5-Speed
Type ......................................... 5-Speed Synchromesh
M odel................................................................... 401V
Nominal Torque Rating.......................... 450 Ft. Lbs.
Clutch Housing.............................................. S.A.E. #2
Lubrication............................... Pressure Lubricated
(Refer to Lubrication (Sec. 10 for Recommended
Lubricant.)
GEAR RATIOS
SPEE D RATIO
1st . . . . . , ........................................................ 7.07:1
2nd ....................................................................
4.33:1
3rd ............................................... ................... 2.68:1
4th ................................................................... 1.64:1
5th .................................................................... 1.00:1
R e v e r s e ............................................................ 6.90:1
BEARINGS (New Limits)
Main Drive Gear
Type ............................. Single Row Ball w/Snap Ring
Make and Number ........................... N.D. 47513X.I.A.
Outside Diam eter............................. 4.7238”-4,7244"
Inside Diam eter............................... 2.5585”-2.5591"
B a l l s .................................... .. . (10) 21/32” Diameter
W id t h ................................................ 0.9050"-0.9053”
Mainshaft Front
Type ................................................ .. Roller
Make and N um ber.................................. Hyatt #BU1307
Outside Diameter........................
2.6730” -2.6734''
Inside Diam eter........................ .. 1.3775”-1.3780”
W id th ...................................................0.8218”-0.8268”
Mainshaft Rear
Type ........................ Single Row Ball w/Snap Ring
Make and Number . ................. .. N.D. 43311XRIA
Outside Diameter . . . . . . . . . . . . . . 4.7238”-4.7244”
Inside Diam eter................................. 2.1648”-2.1654”
B a l l s .................................. .. (8) 25/32” Diameter
W id th................................................ .. 1.1412”-1.1417”
Countershaft Front
Type ............................. ................................... Roller
Make and Num ber.................................. Hyatt #1208TS
Outside Diameter ..............................
3.1491”-3.1496”
Inside Diameter............................. .. 1.9675"-1.9679"
W id th ................................................ 0.7082”-0.7087"
Countershaft Rear
Type ............................. Single Row Ball w/Snap Ring
Make and Num ber............................. N.D. 47309X.I.A.
Outside Diam eter............................. 3.9364”^3.9370"
Inside Diameter................................ 1.7712” -1.7717”
Reverse Idler Gear
. . . . H yatt #95732
......................... 1.875”
..................... . 1.250"
M AIN SHAFT (New
L im its)
D ia m e te r at P ilo t E n d ...............................
1.3783”-1.3788"
D ia m e te r at 4th Speed G e a r ................. , 2.3750''-2.3755”
D ia m e te r at 3 rd Speed G ear . . . . . . , 2.6255”-2.6260"
D ia m e te r at 2nd Speed G e a r .................. 3.0000”-3 .0 0 0 5 ”
D ia m e te r at R e v ers e G e a r ..................... 3.8350”-3 .8 3 5 5 ”
D ia m e te r at 1st G e a r ...................................
2.7510”-2 .7 5 1 5 ”
D ia m e te r at R e a r B e a r i n g ...................... 2.1649”-2.1 6 5 4 "
L e n g t h ................................................................................... 2 1 -1 /3 2 ”
N u m b er of Splines at 4th and
5th S y n ch ro n izer ............................... . . . .....................
10
N u m b er of Splines at 2nd and
3 rd S y n c h r o n i z e r ................................... . . . . ......................10
N um ber of T eeth at R e v e rs e G ear . ...................................22
B acklash with M a t e ............................ . . . 0.001”-0.005"
N u m b er of Splines at
Com panion F lange ............................... .................. . . . . . 10
MAINSHAFT GEARS
M ainshaft 2nd Speed G ear
Inside D i a m e t e r ............................................., . 3.3745”-3 .3 7 5 5 ”
O utside D i a m e t e r ............................... . . , 8.823”-8.833"
N u m b er of T eeth ( O u t e r ) ..................... ,, . .............................51
B ack lash with M a t e ......................................, . . 0.005"-0.010"
N u m b er of Clutch T eeth . . . . . . . . . . . . ..................... . 20
B acklash with M a t e ....................................... . , 0.006”-0.010"
W idth ...................................
. , . 2 .1 0 8 "-2 .1 3 8 ”
M ainshaft 3rd Speed G ea r
Inside D i a m e t e r .............................................. 2.7495"-2.7505"
O utside D i a m e t e r .......................................... 7.456”-7.466"
N um ber of T eeth ( O u t e r ) ..................... .....................................43
B acklash with M a t e ................................... . . . 0.005”-0 .0 1 0 ”
N um ber of Clutch T e e t h ............................................................... 19
B acklash with M a t e ....................................... . . 0 .0 0 6 "-0 .0 1 0 ”
Width ................................................................... . . . 2.072” -2.0 9 2 "
M ainshaft R e v e rs e G ear
Inside D i a m e t e r .......................................... . . . 3 .5 3 0 "-3 .5 3 5 ”
O utside D i a m e t e r ....................................... . . 10.076”-1 0 .0 8 6 ”
N u m b er of T eeth ( O u t e r ) ..................... ...................................50
B acklash with M a t e ................................... . . . 0.006”-0.0 1 2 "
N u m b er of Teeth (Inner) ..................... ...................................22
W i d t h .................................................................. ..................... 1 -1 3 /1 6 "
MAIN DRIVE GEAR
L e n g t h ............................................................... .............. 1 2 -2 7 /3 2 ”
D iam e ter at Spline E n d ......................... . . . 1.495”-1.499"
N um ber of Splines ............................... . ...................................10
CHEVROLET SERIES 70-80 H EAVY DUTY TRUCK SH O P M A N U A L