1–2 Copyright © 2004 General Motors Corp.
1000 AND 2000 PRODUCT FAMILIES SERVICE MANUAL
h. Vocational Model Nomenclature. The first digit
of the nomenclature indicates the product family—
1000, 2000. The second digit (0–4) indicates close
ratio, or (5) wide ratio.
i. Content and Organization. This Service Manual
describes overhaul procedures for 1000 and 2000 Prod-
uct Families automatic transmissions (Figures 1–1 and
1–2). All 1000 and 2000 Product Families vocational
models are included in this manual as are all 1000/
2000/2400 Series transmissions.
• Major transmission components are described
and their functions explained.
• Detailed instructions are provided for
disassembly, rebuild, and re-assembly.
• Part inspection instructions are in Section 3.
• Wear limits and spring data are in Section 7.
j. Illustrations
1. The text is supported with line drawings, ex-
ploded, and cross-sectional views. Overhaul
procedures are illustrated by line drawings.
Cross-sections show the relationship of assem-
bled parts. Cross-sections and exploded views
are on foldout pages in the back of the manual.
2. Illustrations show correct procedures for all
models—including models not illustrated.
k. Maintenance Information. Each task described
in this manual has been successfully completed by
service organizations and individuals. Not every
service organization or individual possesses the
required special tooling, training, or experience to
perform all described tasks. However, any task may be
performed if the following conditions are met:
1. The organization or individual has the required
knowledge of the task through:
• Formal instruction at Allison Transmission
or a Distributor training facility.
• On-the-job instruction by an Allison
Transmission or Distributor representative.
• Experience in performing the task.
2. The work environment is suitable to prevent
contamination or damage to transmission parts
or assemblies.
3. The required tools and fixtures, listed in
Table 3–1 (Section 3 of this manual), are avail-
able.
4. Reasonable and prudent maintenance prac-
tices are used.
NOTE:
Service organizations and individuals are
encouraged to contact their local Allison
Transmission Distributor for information and
guidance on any task outlined in this manual.
1–2. SUPPLEMENTARY
INFORMATION
Supplementary information will be issued, as required,
if any changes occur after publication of this manual.
Check with your dealer or distributor to be sure you
have the latest information.
1–3. ORDERING PARTS
a. Transmission Nameplate. The nameplate (1)
(Figure 1–3) is located on the right side of the
transmission. The nameplate will be one of two styles
(Figures 1–4 and 1–5). Both nameplates are imprinted
with the transmission model, serial number,
transmission identification number, engineering group
number, engineering feature configuration number,
and date of manufacture. Use all of these numbers
when ordering replacement parts or requesting service
information.
b. Parts Catalog. Replacement parts are listed in
Parts Catalog PC3062EN. Do not order by the item
numbers used on exploded views in this manual. Use
the Parts Catalog to determine the correct part number.
Order all replacement parts from your distributor or
authorized dealer. Check the Yellow Pages for your
nearest authorized service outlet. Listings are under
Transmission—Truck, Tractor, Etc.
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