Copyright © 1996 General Motors Corp. 3–17
PREVENTIVE MAINTENANCE
PREVENTIVE MAINTENANCE
(3) Seal all openings and the breather with
moisture-proof tape.
(4) Coat all exposed, unpainted surfaces
with preservative grease such as petrolatum (MIL-C-
11796, Class 2).
(5) If additional storage time is required, re-
peat Steps (2), (3), and (4) at yearly intervals.
d. Storage, One Year — With Transmission
Fluid (Normally in a Vehicle Chassis)
(1) Drain the transmission fluid and replace
the filter element(s).
(2) Fill the transmission to operating level
with a mixture of one part VCI #10 (or equivalent) to
30 parts Allison-approved transmission fluid. Refer to
Paragraph 3–7. Add
1
⁄4 teaspoon of Biobor
®
JF (or
equivalent) for every 3 gallons (1 ml for every 10 li-
ters) of fluid in the system.
NOTE:
When calculating the amount of Biobor
®
JF re-
quired, use the total volume of the system, not just
the quantity required to fill the transmission. In-
clude external lines, filters, and the cooler.
(3) Run the engine for approximately five
minutes at 1500 rpm with the transmission in neutral.
(4) Drive the vehicle. Make sure the trans-
mission shifts through all gears.
(5) Continue running the engine at 1500 rpm
with the transmission in neutral until normal operating
temperature is reached.
(6) If normal operating temperature is less
than 225°F (107°C), with the vehicle wheels blocked
and the parking brake and service brake applied, shift
the transmission to D (Drive) and stall the converter.
When converter-out temperature reaches 225°F (107°C),
stop the engine. Do not exceed 225°F (107°C).
(7) As soon as the transmission is cool
enough to touch, seal all openings and the breather
with moisture-proof tape.
(8) Coat all exposed, unpainted surfaces with
preservative grease such as petrolatum (MIL-C-11796,
Class 2).
(9) If additional storage time is required, re-
peat steps (2) through (8) at yearly intervals; except, it
is not necessary to drain the transmission each year.
Just add Motorstor and Biobor
®
JF (or equivalents).
e. Restoring Transmission to Service
(1) Remove all tape from openings and the
breather.
(2) Wash off all external grease with mineral
spirits.
(3) If the transmission is new, drain the re-
sidual preservative oil. Refill the transmission to the
proper level as specified in Paragraphs 3–5 and 3–7.
(4) If the transmission was prepared for stor-
age without transmission fluid, drain the residual oil
and replace the filter element(s). Refill the transmis-
sion to the proper level as specified in Paragraphs 3–5
and 3–7.
WARNING!
Apply the parking brake, service brake, and
block the vehicle securely. Warn personnel to
keep clear of the vehicle and its travel path. Fail-
ure to do so can cause serious injury.
CAUTION:
Never maintain the stall condition for more than
30 seconds at any one time because of the rapid
rise in fluid temperature. Do not let the con-
verter-out fluid temperature exceed 300°F
(149°C). Do not rely on converter-out fluid tem-
perature to limit stall duration. During stall con-
ditions, internal temperatures rise much faster
than converter-out fluid temperature. Allow the
system to cool between stall checks by perform-
ing the cool-down as described in Paragraph 3–
14e. If the stall test is repeated, do not let the en-
gine overheat.
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