Chevrolet 1979 Light Duty Truck Owner's Manual page 43

VEHICLE MOVING
The transfer case ratio in High is 1:1 and in low Range is approximately 2:1. When the vehicle is moving, it is necessary to double the engine speed when shifting the transfer case
from High Range to Low Range and to decrease the engine speed in half when shifting from low Range to High Range.
TO SHIFT TRANSFER CASE FROM
l ( low)
H ( H igh)
�
l
-
( low)
w
H ( High)
VEHICLE STATI ONARY
Place the transmission selector in Park (P) or Neutral (N) and attempt to shift the transfer case. If the shift cannot be completed, move the selector to Drive (0) or Reverse (R)
momentarily (keep your foot on the brake pedal) and then back to Neutral (N). (This action causes the transmission output to spin the transfer case input gear). The shift can
now be completed.
TO SHIFT TRANSFER CASE FROM
Neutral
Any Position
SHIFTING PROC E D U R E FOR FULL TIME FOUR WHEEL DRIVE
NOTE: The
transfer case selector lever is placed
TO PROCEDURE
1.
Place automatic transmission selector lever in Neutral and then shih transfer case lever
H (High)
to N ( Neutral).
2. Shih automatic transmission selector lever into gear. Depress accelerator pedal to
provide one-half or original engine speed.
3.
Shift transfer case lever from N (Neutral) to H (High Range).
1.
l ( low) Make shift at speed of
2. Place automatic transmission selector lever in Neutral and then shih transfer case lever
to N (Neutral).
3.
Shih automatic transmission selector lever into gear and depress ;accelerator pedal to
.double engine speed from original.
4. Shift transfer case lever from N (Neutral) to l ( low Range).
1 .
low lock ( l loc) ( Used May be made at any speed, forward or reverse.
on low traction surface
2. Move lever into position.
only)
High lock (H loc) ( Used 1. May be made at any speed, forward or reverse.
on low traction surface
2. Move lever into position.
only)
TO
PROCEDURE
1.
With transmission in Neutral, shih transfer case into desired range.
Any Position
2. Shih transmission into desired range.
1.
Neutral
Shih transmission to Neutral
2. Shih transfer case to Neutral
in H (high range normal
) for driving.
1 0
MPH or less.