The library that replaces 14 open tabs

A permanent reference library for the work thatnever quite ends.

Structured, multi-hour courses on diesel repair, LS engine swaps, and wiring diagnostics — built by working technicians, scored by module quizzes, shipped with the diagrams that stay on your bench for the life of the truck.

Get the library — torquebench@polsia.appBrowse the curriculum
Tracks
LS · Diesel · Electrical
Total runtime
43+ hours of video
Diagrams included
120+ printable
Author
Working shop techs
Library · live index
84 modules
  • LS02 · Accessory-drive layout
    24m
    Diagram
  • LS07 · PCM selection & tuning
    52m
    Hands-on
  • DSL12 · Lift-pump data reading
    31m
    Drill
  • ELE04 · Splice-by-splice isolation
    49m
    Drill
Pause and resume across devicesLifetime

Hello, weekend builder. Built for the garage, not the lecture hall — pause a module mid-repair, resume on the bench tomorrow.

Why it's different

Deeper than a YouTube tutorial. Wider than a Penn Foster track.

Torquebench sits in the gap the rest of the market leaves open. Free content gives you a single repair; accredited programs give you a 51-week commitment and a transcript. Torquebench is a permanent library covering LS swaps, diesel repair, and electrical diagnostics under one roof — built once, sold repeatedly, owned for the life of your hobby or career.

  • Against free contentStructured depth, scored module quizzes, working-technician authors — not ChrisFix at 12 minutes a piece.
  • Against accredited programsOne library, three disciplines, no transcript office. Re-watch the same module in 2031 when the harness faults again.
  • Against niche creatorsStop hunting across Facebook groups and TikTok creators — own every reference course you'll ever need.
What every module ships with
Multi-hour video lessonsSequenced the way a senior tech sequences the actual repair.
Printable diagrams & reference sheetsWire colors, pinouts, torque values — on the bench, not in a Dropbox.
Scored module quizzesProve you understood the wire path, not that you watched the video.
Optional hands-on wiring kitsMirror the schematics on screen exactly, so the splice is the splice.
Working-technician authorshipEvery author is a working shop tech with a name and a phone.
Track-level completion certificateFor technicians who need employer credentialing — not for show.

The curriculum

Three tracks. One library. Built once.

Every track is a complete program on its own. Together, they form a single permanent reference set covering the work that crosses bays, shops, and decades.

01
Foundation
LS Engine Swaps

Track 01 · Engine

Plan, spec, and finish an LS swap end-to-end — engine choice, accessory drives, fuel system, PCM tuning, and the install decisions that bite a first-time builder.

Modules28
Video runtime14h
Browse the core course →
02
Working tech
Diesel Repair & Diagnostics

Track 02 · Drivetrain

Read injection-system faults, walk through common failure modes on Duramax / Power Stroke / Cummins platforms, and learn the diagnostic sequence working techs actually use.

Modules34
Video runtime18h
03
Specialist
Wiring Diagnostics & Schematics

Track 03 · Electrical

Trace a fault from symptom to splice. Read factory wiring diagrams fluently, divide a harness into testable zones, and stop guessing at which circuit failed.

Modules22
Video runtime11h

Inside the library

A sample of what lands on your bench.

84 modules across three tracks. Each module is a short, focused repair or diagnostic drill — short enough to finish in a single evening, deep enough to actually change how you work the next morning.

Built once, sold repeatedly.New modules are added to existing buyers' libraries at no extra cost — the track you bought in 2026 is bigger in 2027.
Module index · preview
TrackModuleRuntimeMethod
LSChoosing the right LS for your chassis and goals38 min
Video
LSFront-accessory drive layout and belt routing24 min
Diagramming
DSLInjection-system pressure faults: where to start42 min
Diagnostic drill
DSLReading a Duramax lift-pump failure from data31 min
Hands-on
ELESplice-by-splice fault isolation in a body harness49 min
Diagnostic drill
ELEReading a GM LAN bus schematic without losing it36 min
Diagramming
Showing 6 of 84 modulesScored quizzes on every module
Built by the tech on the floor

Authors own shops, work bays, and on-call rotations. Every module is reviewed against a real repair, not a marketing brief.

Diagrams that stay on the bench

Printable, pinnable, and ordered in the same sequence the course walks you through. Wire colors are real wire colors.

Diagnostic drills, not slideshows

Modules end with a scored drill where the next move is yours — the way a senior tech quizzes an apprentice at the bench.

Questions worth asking

The honest answers before you buy.

We'd rather you ask once now than email later. If something below isn't enough, the team reads everything sent to the address at the bottom of the page.

Lifetime access · working-tech authored · certificate on every track · official email: torquebench@polsia.app

Get the library

Stop hunting across Facebook groups.

One inbox, one library, every reference course you need for the life of the truck or the career. Email the team — they'll send pricing, the current module list, and kit shipping windows for your country.

Email torquebench@polsia.appRe-read the curriculum
Direct linetorquebench@polsia.appReplies usually within one working day.
  • LS swaps · Diesel repair · Wiring diagnostics
  • Lifetime library · printable diagrams · scored quizzes
  • Optional hands-on kits ship worldwide