The Most Confusing Part of Your Car EXPLAINED

Overview

The video explains torque vectoring, why it’s often misunderstood, and how manufacturers sometimes use the term as marketing language. It contrasts basic (often “cheap”) implementations with advanced systems that actually redistribute torque to improve handling.

Core idea: real engineering vs. hype

• Car marketing frequently relies on vague phrases (e.g., “intoxicating form,” “compelling function”).
• The host’s goal is to separate genuinely effective torque vectoring from systems that are essentially rebranded stability control.
• The episode focuses on identifying which torque vectoring approaches truly improve vehicle behavior by redistributing torque.

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Step 1: How a differential works (the baseline problem)

Why cornering creates a torque/rotation mismatch

• When cornering, the outside wheel travels farther than the inside wheel.
• A differential allows the left/right wheels to rotate at different speeds while still receiving power from a single drive input.

Open differential and the “traction difference” problem

• A common open differential typically shares torque equally.
• But this creates a key problem:
  • If one wheel has low grip, it becomes the limiting wheel.
  • The other wheel may receive insufficient torque, meaning the grippy side can’t be fully utilized.
• The video explains the mechanical internals, including:
  • Ring gear
  • Carrier/case
  • Spider gears
  • Side gears
• It also describes how open diffs can leave the car stuck when grip differs greatly between wheels.

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Why limited-slip differentials (LSDs) help—but aren’t perfect

The video covers limited slip differentials (LSDs), especially clutch-pack LSD behavior:

• Under normal conditions, a clutch-pack LSD can behave similarly to an open diff.
• If slip occurs, the clutch packs engage, helping lock the wheels more together.
• This limits how much the low-grip wheel can spin, improving traction.

Tradeoffs of LSDs

• Maintenance
• Complexity
• Cost
• They’re often reactive, responding based on what’s already happening rather than predicting what’s coming next.

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Step 2: Sensors and “can see into the future” behavior

Torque vectoring is framed as conceptually similar to an LSD, but more proactive.

Key enabling sensor: yaw rate

• The video highlights the yaw rate sensor, which measures the car’s rotation about its center axis.
• It uses a micro electrically conductive gyroscope.
• Yaw rate measurement underpins electronic stability control (ESC):
  • ESC can correct understeer by braking specific wheels when the car isn’t rotating as the driver intends.

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Types of torque vectoring (and how “real” they are)

1) Brake-based torque vectoring (“dollar store torque vectoring”)

This approach uses brakes to add resistance to a slipping wheel, helping it use the torque it receives from the differential more effectively.

• Often implemented using wheel speed sensors
• More advanced systems incorporate steering angle and other inputs

Strengths

• Improves feel (less understeer, sharper response)
• Can encourage rotation at turn-in
• Typically cheap to implement (mostly software/ECU plus existing brake hardware)

Criticism

Some enthusiasts/journalists argue this isn’t “real” torque vectoring because braking resistance doesn’t directly increase drive torque to the outside wheel the way an LSD-style system does.

Naming examples (how marketing language varies)

• The host notes that Ford systems describe brake torque application in ways that can sound marketing-driven.
• Porsche avoids the phrase “torque vectoring” for brake-only setups, calling it an automatic braking differential.

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2) Clutch-pack torque vectoring differential (more direct/“real” torque routing)

Example: Lexus RCF (2014)

This system uses electronically controlled clutch packs with more predictive control:

• Uses vehicle sensors and driver-selected settings to engage clutches predictively
• Uses two electric motors (one per axle) to actuate a cam and control clutch lock amount

How it differs from brake-only

• Clutches enable independent side-to-side torque variation, which open diffs can’t do.
• The system can combine clutch-based locking with independent negative torque braking to encourage rotation.

Claimed benefits

• Decreases lap time
• Increases lateral grip
• Reduces the steering angle required to initiate rotation

Cost claim

• Presented as about a $1,250 option

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Advanced systems teased

The host mentions even more sophisticated torque vectoring, mainly in all-wheel-drive vehicles:

• May involve up to three differentials
• Must vary torque:
  • Front vs. rear
  • Side to side

The video also teases future coverage, including:

• Audi Quattro
• A possible episode on electric cars

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Main speakers / sources

Main speaker

• Jeremiah Burton (Donut Media / B2B series), the primary explainer of torque vectoring systems.

Referenced sources/companies/journalists (as cited in the explanation)

• Car and Driver (commentary on brake-based systems)
• Ford (wording described as brake-based)
• Porsche (naming/behavior approach; e.g., “automatic braking differential”)
• Lexus (2014 RCF electronically controlled torque vectoring differential)
• ESC / ECU / automotive engineering references (technical foundation)

Sponsor (non-technical)

• Omaze (Porsche 911 GT3 giveaway)