Chevrolet 70 1969 Series, Shop Manual

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TRANSMISSION AND CLUTCH 7-58
SPECIFICATIONS (CONT.)
Number of Teeth at Countershaft
Drive Gear Contact ........................................... .. 27
Backlash with Countershaft
Drive G e a r ......................................... 0.005"-0.010"
Diameter at Front Bearing Surface . . 2.3621"-2.3626"
Diameter at Pilot E n d ........................ 0.9832”-0.9837”
CO U N TE R SH A FT
Diameter at Front Bearing Surface . . 1.9994"-2.0000"
Diameter at 3rd, 4th, and Drive
Gear Surfaces.................................. 2.2510”-2.2515”
Diameter at Rear Bearing Surface . . . 1.7716"-1.7721”
Number 1st Speed Gear Teeth............................. .. 14
Backlash with M ate............................... 0.005"-0.010"
Number 2nd Speed Gear T e e t h ............................. . 25
Backlash with M a te ............................... 0.005"-0.009''
Number Reverse Gear Teeth ............................. , . 16
Backlash with Mate
............................. 0.005"-0.010”
Le n g th ................................................. 14.369"-14.649"
C O U N TERSHAFT GEARS
Drive Gear
Diameter of B o r e .................................. 2.249"-2.250"
Outside Diam eter.................................. 7.360"-7.370''
Number of Teeth ..................................................... 50
Backlash with Main Drive G e a r............ 0.005”-0.009"
W id t h ..................................................... 2.090"-2.105"
3rd Speed Gear
Diameter of B o r e .................................. 2.249''-2.250"
Outside Diam eter.................................. 5.069"-5.079"
Number of Teeth ..................................................... 34
Backlash with Mainshaft 3rd
Speed G e a r ......................................... 0.005”-0.009"
W id t h ..................................................... 1.623"-1.627"
4th Speed Gear
Diameter of B o r e .................................. 2.249” -2.250"
Outside Diam eter.................................. 6.416"-6.426''
Number of Teeth ..................................................... 43
Backlash with Mainshaft 4th
Speed G e a r ......................................... 0.005"-0.009"
W id t h ..................................................... 1.496"-1.502"
C O U N TERSHAFT DRIVE GEAR SPACER
Inside Diameter........................................2.360"- 2.404"
Outside Diam eter.................................. ...2.500"-2.510"
W id t h ..................................................... ...1.810v-1.814”
REVERSE ID LER GEAR
Diameter of B o r e .................................. 1.750"-1.751"
Outside Diameter—Rear G e a r ............... 3.810"-3.820”
Outside Diameter—Front G e a r ............ 4.240"-4.250"
Number of Teeth (F ro n t)......................................... 24
(Rear)............................................ 21
Backlash with M a te ................................ 0.005"-0.010"
REVERSE ID LER SHAFT
L e n g th ........................
Outside Diameter . . . . 1.249"
. . 9’
-1.250’
R EVERSE IDLER GEA R BEARING SPACER
Inside Diam eter................................ 1.4715"-1.4235'
Outside Diam eter............................................ 1.6875'
W id t h .................................................................. 1.250"
SPRINGS
1st and Reverse Latch Plunger Spring
Free Length ...................................................
Compressed L e n g t h ................. 1-1/4" Under
Number of Coils.................................................
Poppet Ball Spring—Yellow (1st and Reverse)
Free Length ...................................................
Compressed Length ............ 15/16" Under 20-
Number of Coils ..............................................
Poppet Ball Spring—Plain (2nd, 3rd, 4th, and
5th Speed)
Free Length .....................................................
Compressed Length ............ 15/16" Under 35-
Number of Coils.................................................
Poppet Ball Spring—Plain (4th and 5th
Speed—Inner)
F ree Length ......................................................
Compressed Length .............. 7 /8 " Under 27-
Number of Coils....................................... 16 (14
1.7187"
36 Lbs.
. 9-1/2
1-9/16"
25 Lbs.
. . . 11
1
-
1
/
2
"
40 Lbs.
10-3/4
1
.
200
"
29 Lbs.
Active)
WASHERS
Mainshaft 2nd Speed Gear Locating Washer
Inside Diam eter.................................... 2.752"-2.762"
Outside Diam eter.............................................. 3-1/2”
Thickness.............................................. 0.142"-0.144"
Material.................................. S.A.E. 1016 H.R. P & O
Mainshaft 4th Speed Gear Locating Washer
Inside Diam eter.................................... 2.252"-2.262"
Outside Diam eter.................................. .. 3-3/16"
Thickness.............................................. 0.155"-0.169”
Material...................................................
S.A.E. 4720
Mainshaft 2nd Speed Gear Retainer Washer
Select One At Assembly
THICK
Inside Diam eter....................................... 2.783"-2.793"
Outside Diameter...............................................3-1/2"
Thickness ............................................ 0.154"-0.156"
Splines (Inner) N u m b e r ............................................ 10
Notches (Outer) Number ............................................2
M EDIUM
Inside Diam eter.................................... 2.783"-2.793”
Outside Diam eter.............................................. 3-1/2"
Thickness.............................................. 0.150"-0.152"
Splines (Inner) N u m b e r ............................................ 10
Notch (Outer) N u m b e r .................................................1
THIN
Inside Diam eter..................................... 2.783"-2.793”
Outside Diam eter.............................................. 3-1/2"
Thickness.............................................. 0.146"-0.148"
Splines (Inner) N u m b e r ............................................ 10
Notch (Outer) N u m b e r .......................................... None
Mainshaft 4th Speed Gear Retainer Washer
Select one at Assembly
THICK
Inside Diam eter..................................... 1.809"-1.819"
Outside Diam eter.................................. 2.927"-2.937"
Thickness.............................................. 0.154"-0.156"
Splines (Inner) N u m b e r ............................................ 10
Teeth (Outer) N u m b e r .............................................. 17
Notches (Outer) Number .......................................... 2
Notch (Inner) N u m b e r ............................................... 1
CHEVROLET SERIES 70-80 HEAVY DUTY TRUCK SH O P M A N U A L