This 65-page Mechanic’s Tips manual covers the Allison 700 Series hydraulic controls transmissions, providing field-level guidance on preventive maintenance, fluid checks, transmission removal and installation, PTO setup, shift selector adjustment, and stall testing. Published by Allison Transmission under document number MT1366EN (April 2006), it targets technicians servicing HT and CT/CLT/CLBT 700 Series units with hydraulic shift controls.
Official Allison 700 Series hydraulic controls document details
| Brand | Allison Transmission |
| Model coverage | HT 740, HT 740FS, HT 747, HT 754CR, HT 750DR (DB), CT 750/754, CLT 750/754, CLBT 750/754 (DB) |
| System / Group | Automatic transmission — hydraulic controls |
| Publication no. | MT1366EN |
| Year / Revision | April 2006 (printed June 2006) |
| Pages | 65 |
| File size | 1.0 MB |
| Format | |
| Language | English |
Document table of contents
- Section I — Introduction: About This Manual
- Section II — Preventive Maintenance: fluid level test procedures, aerated fluid, fluid recommendations (TranSynd, DEXRON), fluid and filter change intervals, contamination analysis, auxiliary filter, breather maintenance, transmission stall test and neutral cool-down
- Section III — Removing Transmission From Vehicle: draining, disconnecting controls, uncoupling from driveline and engine, removing output flange or yoke
- Section IV — Preparing Transmission for Installation: flywheel inspection, output/input flange installation, shift selector lever, power takeoff (PTO) installation, shift modulator control, oil fill tube, front mounting spacers
- Section V — Preparing Vehicle for Transmission Installation: engine-transmission adaptation, flexplate drive assembly inspection, chassis driveline inspection, cooler/filter/lines, inspecting controls
- Section VI — Installing Transmission Into Vehicle: mounting to engine, coupling to driveline, connecting cooler and filter lines, shift selector control, hydraulic input retarder control, modulator control, PTO controls, parking brake, output disconnect shaft (dropbox), speedometer drive, temperature and pressure sensors, filling the hydraulic system
- Section VII — Tests and Adjustments
- Section VIII — Customer Service: owner assistance, available service literature
Applicable truck models
The manual applies to all vehicles equipped with Allison HT 740, HT 740FS, HT 747, HT 754CR, and HT 750DR (including dropbox variants), as well as CT, CLT, and CLBT 750/754 (DB) transmissions using hydraulic shift controls. These units are found in heavy-duty on-highway trucks, off-highway haulers, and oil-field service vehicles. Related companion publications referenced inside the document include Service Manuals SM1270EN and SM1314EN, Parts Catalogs PC1268EN and PC1315EN, Troubleshooting Manual TS1838EN, and Technician’s Guide GN2033EN. For current product information and additional resources, visit Allison Transmission’s official website.
Who needs this Allison 700 Series hydraulic controls manual
Fleet mechanics, independent workshop technicians, and service managers responsible for maintaining or overhauling Allison 700 Series transmissions with hydraulic controls will find this document essential. It consolidates fluid-level procedures, stall-test specifications, PTO backlash measurements, shift selector position charts, and step-by-step removal and installation sequences into a single field reference.
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