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Select for light-, medium- and heavy truck training.
General Courses provide non-make specific training for fleet and leasing personnel, and are ideal for those working with multiple makes, used vehicles, or a developing product line.
Effective product training courses optimized for:

“Knowledge is the Key
to Greater Sales Rewards”

Give your staff a sales edge through greater product knowledge and confidence. As one TMI graduate wrote: “Knowledge is the key to greater sales rewards.” TMI correspondence courses provide cost effective in-depth truck product training that is self-paced and flexible, with no travel time or expense.

Mack Product Training

For Mack personnel we offer two distinct, standalone courses. This page outlines both our heavy-duty Course III, and our Mid-Range Diesel Course IV.


Course III: Heavy-Duty Models Catalog and Application

Course IV: Mid-Range Diesels Catalog and Application

To Enroll: Download the TMI Catalog and Application or call 800-447-1251. Click on the blue text links above to get the PDF catalog and applications to fill out on your computer and print for signing and faxing to TMI. The files are about 300KB, allow adequate time to fully download.


Heavy trucks and tractors Our ten lesson Course III is highly recommended for all Mack sales personnel. Students study and are tested on Mack product information as well as advanced concepts in sales engineering and specing of Class 8 vehicles. Graduates complete ten written tests using the 392 page TMI textbook and your Mack product data. Tests are mailed or faxed to us for hand grading. This in-depth course typically requires over 70 hours of study time to complete.

Students work through the ten tests for this course and mail or fax them to TMI for grading. Grades and comments are often returned in one business day. The cost for this in-depth heavy-duty product training is US$825 per US or Canadian enrollment.


Mid-Range Diesels, For Mack personnel working with medium duty trucks we recommend our course IV. About 50 hours of study time is required for this ten lesson course using our 354 page textbook to provide full coverage of Class 5-6-7 diesels. Graduates complete ten written tests using the TMI textbook. The tuition is $795 per student.

GET THE eBOOK: The textbooks for Course III and Course IV are available as an enhanced PDF eBook on a CD in addition to the printed version. This is a $30 option for these courses. Using Adobe Acrobat Reader, students scroll through, read and search the textbook on most any computer.


Now is the time to consider this cost effective product training for your staff. Business sponsored enrollments are treated as company property. If an active course is not completed for any reason the value of the “unused” lessons can be credited to enroll another employee. To enroll, or if you have questions, call us toll-free at 1-800-447-1251.


Precision Truck Training

Course III — Heavy Duty Models

Lesson 1 Productivity and Cost Relationships, Introduction to the Metric System.

Lesson 2 Model Types, Terms, Weight Ratings, Laws and Loads.

Lesson 3 Truck Weight Distribution and Optimum Payload Capacity.

Lesson 4 Tractor Trailer Weight Distribution and Maximum Load Capacity.

Lesson 5 Chassis Components: Frame, Springs, Axles, Wheels, Tires. GAWR Rating System.

Lesson 6 Vehicle Performance: Torque and Power, Performance Losses, Making a Performance Analysis—Reserve Power and Gradeability.

Lesson 7 Choosing the Drivetrain: Gearing, Rear Axles, Transmissions, Shift Patterns.

Lesson 8 Low Speed Performance: Gradeability, Traction, On/Off Road Gearing, Gas or Diesel?

Lesson 9 Speed Control: Air Brake Systems, Engine Brakes, Transmission and Driveline Retarders.

Lesson 10 The Support Systems: Electrical, Cooling, Exhaust, Emissions, Noise Control, Power Take-Offs, The Driver Environment.

Appendix Tables & Data: Weights & Measures, Performance Formulas, Swing Radius, Weight Distribution, Tire Capacities, Grade Resistance, Air Resistance, Electrical Loads.

Index Subjects and Terms


Click below for a 37 page PDF sample of the Course III Heavy-Duty book.

This file is about 500K.

Download a 43 page PDF textbook sample for Course IV: Mid-Range Diesels

This file is about 350KB.

These books may have color enhancements found only in the optional eBook version of the textboo


Precision Truck Training

Course IV — Mid-Range Diesels

Lesson 1 Truck Weight Ratings: Classes and Groups, Chassis Types, Cab Types, Dimensions, Fuel Supplies and Costs.

Lesson 2 Inflation, Diesel vs. Gasoline, Depreciation, Expense Deductions, Leasing, Financing.

Lesson 3 Why Diesels are Fuel-Efficient, Engine Performance Terms and Measurements, Torque & Power, Inner Workings of Diesels, Engine Specifications, Engine Rebuildability.

Lesson 4 Axle Ratio—Key to Truck Performance, Geared Speed Equations, Power Demands, Calculating Top-Gear Performance, How to Determine Net Power Required.

Lesson 5 Low Speed Performance, How to Gear for Gradeability, Transmission Ratios and Geared Speeds, How to Make a Shift Chart, Rear Axle Functions, Types and Gearing.

Lesson 6 Selecting the Best Driveline Combination, Transmission Types, Clutches and Prop Shafts Power Take-Offs.

Lesson 7 Truck Weight Distribution, Body and Wheelbase Lengths, Guidelines for Gross Weight Distribution, Tractor-Semitrailer Weight Distribution and Dimensions.

Lesson 8 GAWRs and GVWR, Frame Designs, Front & Rear Suspensions, Steering Systems, Choosing Tires, Tire Sizes & Dimensions, Tire Types, Wheels and Rims.

Lesson 9 Brake Systems, U.S. FMVSS-121, Weight Transfer During Braking, Retarder Devices.

Lesson 10 Engine Temperature Control, Diesel Fuel Systems, Electrical Systems, Terms and Components, Special Bodies and Equipment, Final Result: The Right Truck for the Job.

Lesson 10M How to perform power, weight and cost calculations using metric formulas.

Index Subjects and Terms