GMC C series 2002 Owner's Manual page 68

Eaton Fuller 9 and 10-Speed
Non-Synchronized Manual Transmissions
(If Equipped)
If your vehicle has one of these unsynchronized
transmissions, it's naturally somewhat complicated. The
label above the windshield will tell you the operating
basics you need to know.
The following are driving tips.
D
Always choose an initial starting gear suitable for the
load and terrain.
D
-
Always use double clutching procedures
when shifting.
D
Never move the range shift knob with the
transmission shift lever in neutral while the vehicle
is moving.
D
Never make a range shift while moving
in REVERSE (R).
Double-Clutching
-
You must use the double
shift an unsynchronized gear set. Disengage the clutch,
shift to neutral and engage the clutch. When upshifting,
slow the engine until the engine rpm and road speed
match. When downshifting, accelerate the engine until
the engine rpm and road speed match. Then quickly
disengage the clutch and move the shift lever to the
next gear position and engage the clutch.
clutching method when you
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