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Allison transmission 3000 and 4000 service manual pdf. Allison Transmission Service & Repair ManualsAllison transmission 3000 and 4000 service manual pdf
We make every effort to keep our service information current and accurate. Because of the time lag involved with writing and printing processes, the transmission TCM may report a code that has not yet been added to this document.
If you encounter a code that is not yet in this publication, please call Allison Transmission. This manual provides troubleshooting information for the and Product Families Transmissions. Specific instructions for using many of the available or required service tools and equipment are not included in this manual.
The service tool manufacturer will furnish instructions for using the tools or equipment. Additional information may be published from time to time in Service Information Letters SIL and will be included in future revisions of this and other manuals. This publication is revised periodically to include improvements, new models, special tools, and procedures.
A revision is indicated by a new date on the title page and in the lower left corner of the rear cover. Check with your Allison Transmission service outlet for the currently applicable publication. Additional copies of this publication may be purchased from authorized Allison Transmission service outlets. Look in your telephone directory under the heading of Transmissions — Truck, Tractor, etc. Take time to review the Table of Contents and the manual. Reviewing the Table of Contents will aid you in quickly locating information.
NOTE: Allison Transmission is providing for service of wiring harnesses and wiring harness components as follows:. Allison Transmission AT is responsible for warranty on these parts. Clair Technologies Inc. SCTI will have parts catalogs available. The SCTI addresses and phone numbers for parts outlets are:. These warnings and cautions advise against using specific service procedures that can result in personal injury, equipment damage, or cause the equipment to become unsafe.
These warnings and cautions are not exhaustive. Allison Transmission could not possibly know, evaluate, or advise the service trade of all conceivable procedures by which service might be performed or of the possible hazardous consequences of each procedure. Consequently, Allison Transmission has not undertaken any such broad evaluation. Proper service and repair is important to the safe and reliable operation of the equipment. The service procedures recommended by Allison Transmission and described in this manual are effective methods for performing troubleshooting operations.
Some procedures require using specially designed tools. Use special tools when and in the manner recommended. Is used when an operating procedure, practice, etc. NOTE: Is used when an operating procedure, practice, etc. Display occurs one character at a time. Pushbutton Shift Selector.
Lever Shift Selector. External Wiring Harness. Internal Wiring Harness. Throttle Source. Engine Coolant Temperature. Fluid Level Reading Procedure. Fluid Level Check Procedure. Cold Check Procedure. Hot Check Procedure. Foreign Material. Beginning the Troubleshooting Process. Solenoid Locations. Diagnostic Code Schematics. A—1 B. B—1 C. C—1 D.
F—1 G. G—1 H. H—1 J. J—1 K. K—1 L. L—1 M. M—1 N. N—1 P. P—1 Q. Q—1 R. The Allison 4 th Generation Controls feature closed-loop clutch control to provide superior shift quality over a wide range of operating conditions. The and Product Families transmissions configurations can be programmed to have up to six forward ranges, neutral, and one reverse range. Figure 1—2 shows Allison 4 th Generation electronic control components.
Allison 4 th Generation Controls consist of the following elements:. Bulkhead Connector Optional. NOTE: Illustration is not to scale. Actual harness configuration may differ from this illustration. Figure 1—2. Typical Allison 4 th Generation Control Components. The electronic control of the transmission is performed by a microcomputer. The TCM Figure 1—3 contains the microcomputer which is the brain of the control system. The TCM receives and processes information defining:.
This is the date when the TCM passed final testing. This date is commonly used to denote the change configuration level of the TCM. It is normal for the TCM date displayed electronically to be a few days prior to the date shown on the label.
All shift selectors except the strip-type pushbutton have a dual digit vacuum fluorescent VF display and a mode indicator LED. During normal transmission operation, illumination of the LED indicator shows that a secondary or special operating condition has been selected by pressing the MODE button. Display brightness is regulated by the same vehicle potentiometer that controls dash light display brightness. More information on both types of shift selectors is continued below.
Pushbutton Shift Selector Figure 1—4. There are three full-function pushbutton shift selectors and a strip pushbutton shift selector. A full-function shift selector has a MODE button and diagnostic display capability through the dual digit vacuum fluorescent VF display. The strip pushbutton shift selector does not have a MODE button,. The full-function pushbutton shift selector has. The N Neutral button has a raised lip to aid in finding it by touch. The strip pushbutton shift selector has either three or six range selection positions as shown in Figure 1—4.
Lever Shift Selector Figure 1—4. The lever shift selector can have as many as six forward range positions seven for the 7-speed models , as well as R Reverse and N Neutral. There is a hold override button which must be pressed and held in order to move between certain selector positions. The hold override button must be pressed when shifting between R , N, and D.
The hold override button is released when the desired selector position is reached. The selector lever can be moved freely between D and the numbered forward ranges without pressing the hold override button. The lever selector can be chosen with the lever on the left side or on the right side and with the R Reverse position toward the front or toward the rear of the selector. Visually confirm that the range selected was attained. If display is flashing, shift is inhibited. The TPS contains a pull actuation cable and a potentiometer.
One end of the cable is attached to the engine fuel lever and the other, inside a protective housing, to the TPS potentiometer. The voltage signal indicates the throttle position and, in combination with other input data, determines shift timing. Three speed sensors—engine speed, turbine speed, and output speed—provide information to the TCM. The engine speed signal is generated by ribs on the shell of the torque converter pump.
The turbine speed signal is generated by the rotating-clutch housing spline contours. The output speed signal is generated by a toothed member attached to the output shaft except for the Product Family 7-speed models, where the toothed member is the transfer case idler gear.
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