Chevrolet 70 1969 Series, Shop Manual

Page: 847 / 913

TRANSMISSION AN D CLUTCH 7-101
SPECIFICATIONS
M A K E AND M O D E L ............... SPICER 5831-B 3-SPEED
T Y P E .................................. Constant Mesh Helical Gear
GEAR RATIOS
Low .................................................................. 2.35:1
Direct ............................................................... 1.00:1
Overdrive.......................................................... 0.85:1
BEARINGS
Type
Drive G e a r ........................................................ Ball
Mainshaft
F ro n t.......................................................... Roller
Rear .............................................................
Ball
Countershaft.................... Opposed Tapered Rollers
Mainshaft G e a r s .............................................. Plain
Tapered roller bearings adjustable by means of shims
(See text).
G E A R BACKLASH
Mainshaft Low Speed Gear
to Countershaft .................................. 0.006"-0.011"
Drive Gear and Mainshaft
O.D. Gear to Countershaft Gear.......... 0.006"-0.009”
Mainshaft Gears to Sliding
Clutches.............................................. 0.004"-0.007"
Sliding Clutches to Clutch G e a r ............ 0.004”-0.007''
C L E A R A N C E B E T W E E N
Shifting Forks and Shift Collars............ 0.005''-0.016"
SHIMS A N D SPACERS
Countershaft Rear Bearing Cap Shim
Thickness.................................. 0.003"-0.010"-0.030"
SHIFT ROD P O P P E T SPRING
Free Length................................................... 1-15/32"
Lbs. Pressure @ 1-21/64"
........................ 29# ± 3#
GEARS A N D SHAFTS
Mainshaft Overdrive Gear
Bore I.D .............................................. 2.2520"-2.2525"
Mainshaft Direct Drive
Gear Bore I.D..................................... 2.2520"-2.2525”
Mainshaft Diameter at
Gear Surfaces.................................. 2.2488"-2.2493"
T OR Q U E W R E N C H SPECIFICATIONS
Drive Gear Nut ................................. 400-450 ft-lbs.
Mainshaft Nut ..................................... 400-450 ft-lbs.
CHEVROLET SERIES 70-80 H EAVY DUTY TRUCK SH O P M A N U A L