Under The Hood - LIVE Show Automotive Experts Giving You Advice
Under The Hood show
Under The Hood show May 18, 2026
Under The Hood - LIVE Show Automotive Experts Giving You Advice

Under The Hood - LIVE Show Automotive Experts Giving You Advice

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0:00
55:45
Under The Hood - LIVE Show Automotive Experts Giving You Advice
2019 Ford Escape
Car

2019 Ford Escape

A 2019 Ford Escape is a small SUV. Here, the discussion is about changing the transmission fluid and whether the fluid turning dark is normal or a sign of trouble.

Term

trans-drain

A trans-drain means you drain some of the transmission fluid and refill it. It doesn’t necessarily replace all the old fluid at once, so the new fluid can still look dark.

Term

closed system

They’re saying the transmission is set up so you can’t just open a drain pan like on some cars. That changes how the fluid gets drained and replaced during service.

Term

complete flush

A complete flush is when you try to replace transmission fluid throughout the whole system, not just what you can drain. It can make the fluid look cleaner, but it’s a bigger job than a simple drain-and-fill.

Term

change intervals

Change intervals are the recommended schedule for when to change the transmission fluid. The idea is to change it often enough to keep the transmission healthy, even if the fluid darkens.

Term

drain and fill system

“Drain and fill” means you drain out some of the old fluid and add new fluid back in. It usually doesn’t replace 100% of the old fluid because some stays in the system.

Term

oil change

An oil change replaces engine oil to remove contaminants and replenish additives that protect engine parts. The host is emphasizing a frequent interval (every 3,000 miles) due to the presence of a turbo, which can increase heat and stress on oil.

Term

turbo

A turbocharger (“turbo”) forces more air into the engine, which increases power but also raises operating temperatures and stresses. That’s why the host ties more frequent oil changes to the turbo’s higher demands on engine oil.

Term

transmission fluid

Transmission fluid lubricates internal transmission components and helps control hydraulic pressure for shifting. Changing it on a schedule can reduce wear, but the “right” interval depends on the transmission design and how the car is used.

Term

Motorcraft Mercon LV

Motorcraft Mercon LV is a special kind of fluid used in some automatic transmissions. It’s made to match a specific Ford requirement, so the transmission can shift correctly. If you use the wrong fluid, the car may shift poorly or wear out faster.

Term

twisted lifter

A “twisted lifter” is a special lift setup in a shop. It positions the car so fluids can drain out more completely during service or disposal. It’s basically a tool to make draining easier and cleaner.

Company

Superior Recycling Systems

Superior Recycling Systems is the company that provides the lifting system used in the episode’s high-volume bay. In this context, they’re supplying equipment for draining and handling vehicles destined for recycling or disposal. It’s a vendor mention that helps listeners understand where the gear comes from.

Term

fluid evacuation devices

Fluid evacuation devices are machines/tools that pull fluids out of a car. In this shop, they use them to remove things like oil, coolant, brake fluid, and windshield washer fluid. The goal is to drain the car safely before it’s recycled or crushed.

Term

catalytic converter

A catalytic converter is a part in the exhaust that helps clean up the car’s fumes. Taking it off usually breaks emissions rules and can cause the car to fail inspections.

Term

oil drain plug

The oil drain plug is the plug at the bottom of the engine’s oil pan. When it’s removed, the old oil can drain out for service.

Part

transmission pan

The transmission pan is the bottom part of the transmission that holds the fluid. It’s where you’d normally drain the fluid during a proper service.

Term

clutch slippage

Clutch slippage means the transmission’s clutches aren’t gripping properly. Instead of transferring power cleanly, they slip, which can make the car feel like it’s not accelerating smoothly and can damage the transmission over time.

Term

torque loss

Torque loss means the car isn’t transferring power as it should. With a failing transmission, the car can feel weaker, and the computer may notice signs of that power loss.

2004 Jeep Wrangler TJ Rubicon
Car

2004 Jeep Wrangler TJ Rubicon

This is a 2004 Jeep Wrangler Rubicon, a trail-ready version of the Wrangler. The big problem they’re dealing with is the engine sometimes shutting off unexpectedly and then acting up when they try to restart it on rough trails.

Term

intermittent ignition issues

“Intermittent ignition” means the car’s spark/starting system works sometimes and then randomly fails. That can cause the engine to stall and restart problems, especially when you’re driving hard or on uneven ground.

Term

misfire

A misfire is when the engine doesn’t burn fuel correctly in one or more cylinders. It can make the engine run rough or shut off, and it usually triggers diagnostic trouble codes.

Term

two wheel drive

Two-wheel drive (2WD) means only one axle is powering the wheels, which can reduce traction compared with four-wheel drive on loose or steep terrain. On trails, that can make stalling or loss of momentum more likely if the engine cuts out at the wrong moment.

Part

crankshaft position indicator

The crankshaft position indicator (sensor) tells the engine control unit exactly where the crankshaft is, which is critical for timing spark and fuel injection. If it’s faulty or intermittent, the engine can stall and be difficult or impossible to restart.

Part

throttle plate

The throttle plate controls the airflow into the engine. If it gets dirty or doesn’t move smoothly, the engine can run oddly or stall.

Term

tow ropes

Tow ropes are used to pull a stuck or disabled vehicle out of trouble. On a trail, they can be the difference between waiting for help and getting moving again.

Term

rebuilt computer

A rebuilt computer means the car’s electronic control box is repaired and tested, rather than replaced new. You usually turn in your old one and get a repaired unit back.

Term

aftermarket

Aftermarket parts are replacements made by other companies, not the car’s original brand. They’re often used when the original parts are no longer available.

Company

a company in California

They mention a shop in California that repairs and rebuilds the car’s engine computer. It’s the kind of place you might use when new replacement parts aren’t available.

Term

engine computers

The engine computer is the car’s main brain for the engine. It usually doesn’t fail on its own—problems are more often caused by something else, like a sensor or damaged wiring.

Term

wiring issue

A wiring issue means there’s a problem with the car’s electrical connections or wires. It can cause weird engine problems, and it often takes time to track down exactly where the fault is.

Term

factory harness

The factory harness is the car’s original set of wires connecting all the electronics. If a connection inside that wiring is bad, it can cause electrical problems that are tricky to find.

Term

ground wires

A ground wire is the car’s electrical “return path” to the body/chassis. If it’s loose or broken, the lights or other electronics can stop working or act weird.

Term

relays

A relay is like an electrically controlled switch. If a relay is bad, it can stop power from getting to the lights even if the rest of the wiring looks okay.

Term

check engine light

The check engine light is the car’s way of warning you that something is wrong with the engine or emissions systems. If it doesn’t work, you might miss important warnings.

Term

scan tools

A scan tool is a device that plugs into the car to talk to its computers. It can read codes and sometimes help set up a replaced part so the car recognizes it.

Term

program it back in

This means the new electronic part has to be set up inside the car, not just installed. The car needs to “learn” the replacement so it can communicate with it properly.

Term

hot spare

A “hot spare” is an extra part someone keeps on hand so they can replace a failed component quickly. It’s especially useful when you’re far from help and need the car back running fast.

Brand

Dorman

Dorman is a company that sells replacement car parts. Here they’re being mentioned because they make parts intended to fix common problems.

Term

OE fix

“OE fix” means the replacement part or repair is designed to solve the same kind of problem the car originally had. It’s meant to be a better fix than simply swapping the old part again.

Concept

salvage yard

A salvage yard is where wrecked or unwanted cars get taken apart so parts can be sold. If a part is rare, it usually costs more because fewer cars have it.

Concept

scarcity

Scarcity means there are fewer available parts than buyers want, which typically pushes prices higher. In the context of salvage yards, scarcity often comes from how many vehicles are being parted out and how quickly those parts get bought up.

Concept

market might be

The “market might be” refers to estimating what buyers will pay based on observed listings and sold prices across different regions. This helps sellers and shoppers avoid overpaying when a single quote (or a brokered part) doesn’t reflect true supply and demand.

Term

TPMS sensors

TPMS sensors are little gadgets in your tires that watch the air pressure. They help your car warn you if a tire is getting low.

Term

reduced power mode

Reduced power mode is when the car intentionally makes less power to protect itself. It usually feels weaker or slower until the problem is cleared.

Term

code

In automotive diagnostics, a “code” usually refers to a stored trouble code that identifies the system or sensor involved in a detected fault. The car may store codes even if the driver never sees a warning light.

Term

scanner

A scanner is a tool that plugs into your car to read what the computer has detected. It can help find the problem even if the dashboard light isn’t on.

Term

limp mode

Limp mode is the “safe” driving mode your car uses when something’s wrong. It limits power so you can still get to where you need to go.

Term

DEF

DEF is a special fluid used on many diesel trucks/cars. It’s injected into the exhaust to help clean up the emissions.

Term

reprogrammed

Reprogrammed means the car’s computer software was changed. Here, it’s about updating how the car responds to DEF/emissions-related changes.

Term

reflashed

Reflashed means the car’s computer gets an update. The goal is to fix a problem the computer is detecting (or mis-detecting).

Term

tuner

A tuner is a tool that lets you change the car’s computer settings. It can also be used to switch back to the factory settings.

Term

stock tuning

Stock tuning is the factory computer setup the car came with. It’s the default way the engine is programmed to run.

Concept

repairable vehicle

A repairable vehicle is one that was wrecked but can be fixed and driven again. Damage from the crash can still cause warning codes or odd behavior until it’s properly repaired.

Concept

protective shutdown

Protective shutdown is when a vehicle’s computer limits or stops operation to prevent damage or to ensure emissions compliance. Many diesel trucks will enter a restricted mode or shut down when critical inputs (like DEF) are missing or when emissions-related components can’t function correctly. The goal is to protect the engine and aftertreatment system from harm.

F-750
Car

F-750

The Ford F-750 is a heavy-duty work truck used for commercial jobs. People use it for things like construction and towing. In this conversation, it’s connected to the truck warning about DEF and system protection.

Term

gooseneck

A gooseneck is a special trailer hitch where the trailer’s front part locks into a hitch on the truck bed. It’s used for heavier trailers because it connects more securely.

Term

fifth wheel plate

A fifth wheel plate is the flat mounting area in the truck bed for a fifth-wheel trailer hitch. It’s what lets the truck tow big trailers more securely.

Term

flip forward hood

A flip-forward hood is a hood that opens by swinging forward. It’s often used on work trucks because it gives mechanics better access to the engine.

Mclaren 650S
Car

Mclaren 650S

The McLaren 650S is a very fast, high-end sports car made for performance driving. It’s not a pickup or a truck—it's designed for speed and handling. When people mention it as a “starting” model, they mean it’s the entry point within that supercar lineup.

Ford F450
Car

Ford F450

The Ford F-450 is a heavy-duty pickup truck made for work like towing and carrying heavy loads. It’s larger and stronger than regular trucks. People talk about it in terms of “levels” because different versions can be set up for different kinds of heavy-duty jobs.

Term

brake control recall

A brake control recall is when the maker says there’s a problem with something that helps control the brakes. Owners are supposed to get it fixed, but sometimes dealers can’t get the parts right away.

Concept

factory recall

A factory recall means the car maker admits there’s a problem and tells owners to get it fixed. If it’s a safety issue, the dealer usually has to fix it and provide the parts as part of the recall process.

Term

safety recall

A safety recall is a recall for something that could affect how safe the car is to drive. That’s why the fix is treated as urgent and handled through the official recall process.

Term

analog brake control

Analog brake control is a way of controlling brakes using older-style electronics that don’t rely on digital computer logic. The exact setup depends on the car, but it’s describing the type of brake-control system involved.

Concept

outside of the factory channel

This means the part is being obtained from a different supplier than the one the car maker normally uses. It can help when the dealer can’t get the part quickly, but you’d want to confirm it’s the correct fix for the recall issue.

Term

factory one

They’re talking about using the exact part the car maker intended for that model. It usually fits right and matches the car’s specs better than cheaper alternatives.

Term

manufacturer

Here, “manufacturer” means the car company that built the vehicle. They set the rules for what parts are considered acceptable for repairs.

Concept

safety repairs

Safety repairs are the kinds of fixes that keep the car safe to drive. If something affects braking, steering, or crash protection, the rules for parts are usually more strict.

Brand

Mercedes

They’re talking about Mercedes-Benz and how the company handled parts shortages. The takeaway is that Mercedes approved using other parts so repairs could still be done safely.

Term

OEM part

An OEM part is the “factory-style” part made to match your car. If it’s OEM, it’s the right design for the job, even if it came from a different car.

Term

VIN

VIN is your car’s unique ID number. Shops use it to look up whether your exact car qualifies for a recall fix.

Concept

lawsuit coverage gaps

In some cases, which cars get a free fix depends on what was included in legal action. So even if the same part is used in many cars, only some may be covered.

Term

non-hydraulic setup

A non-hydraulic brake system is one that doesn’t use brake fluid pressure like most cars do. It uses electronics to control the brakes instead, which can change how the system is designed and tuned.

Brand

Brembo

Brembo is a company that makes brake parts for cars. They’re known for performance braking, and here they’re talking about a newer type of braking that doesn’t rely on traditional hydraulic fluid.

Term

hydraulic brakes

Hydraulic brakes are the normal kind of car brakes that use brake fluid. When you press the pedal, the fluid pressure helps push the brakes to slow the car down.

Term

electric brakes

Electric brakes are brakes that use electronics (and often motors) to help apply the braking force. Because of that, engineers can design the braking control differently than with traditional brake fluid systems.

Brand

Sensify

Sensify is a Brembo braking technology. The point is to make braking smarter and to do it without relying on traditional hydraulic brake fluid.

Term

brake system

Your brake system is what makes the car slow down when you press the pedal. It turns your foot pressure into force at the wheels so the car can stop.

Term

self-regenerating

“Self-regenerating” here sounds like a brake design that can renew itself instead of wearing out like normal brakes. Most brakes use pads that slowly wear down over time.

Term

hydraulic fluid

Hydraulic fluid is the liquid that helps your brake pedal push the brakes. It carries the force through the brake lines to the wheels.

Term

master cylinder

The master cylinder is the part that “creates” the braking pressure when you press the brake pedal. If the system doesn’t use hydraulic fluid, it usually can’t use the normal master-cylinder setup.

Term

regenerative braking

Regenerative braking is when the electric car slows down and also recharges the battery at the same time. That’s why lifting off the gas can slow the car without using the brake pedal as much.

Term

modulate

To modulate just means to control something smoothly. Here it’s about using the pedal in a gentle, precise way so the car slows the way you want.

Mach-E
Car

Mach-E

The Ford Mustang Mach-E is an electric car. The way you drive it can let you slow down mostly by lifting off the gas, which is why the brake pedal can feel less necessary.

2019 Ram 1500
Car

2019 Ram 1500

This is a 2019 Ram 1500 pickup truck. The person talking says it has a problem where the car’s sensors don’t always communicate correctly, and it seems to get worse in cold weather.

Term

sensor communication

“Sensor communication” means the car’s sensors are sending information to the computer. If that stops working in the cold, it often comes down to wiring, a connector, or the sensor itself not behaving reliably.

Term

32 or colder

They’re saying the problem shows up when it gets to freezing temperatures. Cold weather can make electrical connections and sensors act up, especially if something is slightly loose or failing.

Term

sensor that's not communicating

If a sensor isn’t communicating, the car isn’t getting the signal it expects from that sensor. The problem could be the sensor, the power/voltage it gets, or the wires connecting it.

Term

reference circuit

A reference circuit is like a steady “power source” the car gives to sensors. It helps the car read sensor signals correctly because the starting voltage stays consistent.

Term

5-volt reference

The car often gives sensors a steady 5-volt signal to measure with. If that signal gets weak or interrupted, the sensors can start “reading wrong,” and the engine computer can get confused.

Term

open circuit

An open circuit is like a broken wire—electricity can’t travel through it. With sensor wiring, that can make the sensor signal weak or wrong.

Term

ECU

The ECU is the engine computer. It sends signals to sensors and uses their readings to control things like fuel and timing—so wrong sensor data can trigger warning codes and poor running.

Term

shorted

A short is when wires touch or fail in a way that lets electricity flow where it shouldn’t. That can mess up the signals from several sensors at once.

Term

MAP sensor

The MAP sensor measures how much air pressure is in the engine’s intake. The engine computer uses that info to decide how to run the engine, so a bad signal can cause problems.

Term

wireless interface module

This is the car’s receiver for the tire sensors. If the receiver has trouble, the car might not get the correct tire sensor information.

Term

data bus

Think of the data bus as the car’s internal communication network. If that network is acting up, different modules (including TPMS-related ones) may not talk correctly.

Term

tire sensors

Tire sensors are small devices in/for the tires that tell the car information about the tires. The episode says using the wrong type of sensor (or mixing brands) can make the car think something is wrong.

Term

factory sensor

A factory sensor is the same type of tire sensor the car came with. They’re saying swapping in a non-factory sensor (even just one) can cause problems with the car’s tire monitoring.

Toyota
Car

Toyota

Toyota is the brand they say they see tire-sensor problems with more often. The main idea is that sensor issues can be more common on some Toyota setups.

Honda
Car

Honda

Honda is mentioned as a brand that may not use tire sensors the same way. The point is that different cars handle tire monitoring differently.

Term

sensors in my tire

Those “tire sensors” are what tell your car the tire pressure. If the sensor isn’t there (or isn’t working), the car can’t reliably know what the pressure is in that tire.

Term

program them

When you add new tire-pressure sensors, the car has to be taught to recognize them. If that setup step isn’t done, the car may still think something is wrong.

Concept

wandering

“Wandering” means the car doesn’t go straight and feels like it keeps drifting. That’s usually related to steering/suspension or tires, not the tire-pressure warning system.

Part

coil

A “coil” is part of the ignition system that helps create the spark your engine needs. If it’s weak or failing, the engine can misfire and run rough.

Term

low voltage circuits

Low-voltage circuits are the car’s wiring that carries small electrical signals to sensors and computers. If that wiring or its connections are damaged, the car can get the wrong information and act weird.

Term

6-speed transmission

A 6-speed transmission is the gearbox with six forward gears. More gears can help the engine run in a better range, but reliability depends on the specific transmission design.

Term

8-speed transmission

An 8-speed transmission has eight forward gears. It can help the engine stay in the right spot for smoothness and efficiency, but long-term reliability depends on the specific unit.

Concept

reliability

Here, “reliability” means how likely the truck is to keep working well for a long time without big breakdowns. The caller is trying to estimate how many miles it can go.

Term

transmissions

A transmission is what changes gears so the engine can work efficiently. It helps the truck accelerate smoothly and handle different speeds and loads.

Term

6L 80

“6L80” is a specific type of automatic transmission used in some full-size trucks. It’s basically the model name technicians use to make sure they’re working on the right gearbox.

Chevrolet Colorado
Car

Chevrolet Colorado

The Chevrolet Colorado is a smaller pickup truck. In this discussion, the hosts say its lighter weight and lower pulling power can mean fewer transmission problems than in bigger full-size trucks.

Car

Chevrolet Canyon

The Chevrolet Canyon is a smaller pickup truck. The hosts say it tends to experience fewer transmission problems because it’s lighter and people don’t use it as hard for towing.

Term

6L90

The 6L90 is a particular automatic transmission used in some GM trucks. The hosts are saying it can be expensive to source used because you may still have to pay for an old “core” part.

Term

core

A “core” is the old part you turn in when you buy a rebuilt replacement. Returning it can lower the price, but if the core is expensive, the total cost goes up.

Term

brake clean

Brake cleaner is a solvent-based spray used to remove brake dust, grease, and grime from brake components. It’s effective on metal surfaces, but it can be risky for sensitive plastics and electrical parts, which is why the hosts steer people toward a dedicated electronic cleaner for electronics.

Brand

CRC QD electronic cleaner

CRC QD electronic cleaner is made for cleaning car electronics. It’s designed to be safer for plastics and to dry quickly so residue doesn’t linger.

Term

plastic safe

“Plastic safe” means the spray won’t harm the plastic parts around electronics. That’s important because some cleaners can melt or crack plastic.

Term

fast evaporating

Fast evaporating means it dries quickly after you spray it. That helps prevent leftover liquid or residue from causing problems with electrical connections.

Term

electrical components

Engine electrical parts need clean, dry connections to work right. If you get the wrong liquid on them, it can cause electrical problems.

Term

oil pressure sensor

The oil pressure sensor tells the car how much oil pressure the engine has. If that sensor is bad, the car may warn you, and you want to fix it so you know the engine is being lubricated correctly.

Term

crankshaft sensor

The crankshaft sensor helps the car’s computer know how fast the engine is turning and where the crankshaft is. If it fails, the engine can stumble or misfire because timing gets thrown off.

Term

connector

A connector is the electrical plug where the sensor wiring connects to the car’s wiring. If oil gets inside, it can cause bad electrical contact and make the problem come back.

Term

mass airflow sensors

This sensor tells the engine computer how much air is coming into the engine. If it gets dirty or coated, the computer can get the fuel mixture wrong.

Term

oxygen sensors

An oxygen sensor checks what’s happening in the exhaust. It helps the car’s computer adjust the fuel mixture so the engine burns fuel correctly.

Term

contamination

Here, contamination means dirt or residue that gets on parts. It can mess up how sensors read or how electrical connections work.

Term

shorting out

Shorting out means electricity is accidentally flowing where it shouldn’t. That can cause the electronics to act up or get damaged.

Term

terminals

Terminals are the metal contact points where electrical connections meet. If they’re dirty or coated, the connection can stop working properly.

Term

conductive

Conductive means something can let electricity pass through it. They’re saying the cleaner leaves a surface that won’t accidentally carry current between contacts.

Term

network

Cars have an electronic communication system that lets computers talk to sensors and modules. If the connections are bad, the computer can’t get the right information.

Term

power steering fluid line leak

If the power steering fluid leaks, it can get onto electrical connectors. That can mess up the electrical connection and cause sensor/engine computer problems.

Term

ECM

ECM is the car’s engine computer. It reads sensor signals and uses them to control things like fuel and engine operation.

Term

corrosion

Corrosion is rust-like damage on the metal inside a connector. It can stop the electrical signal from getting through reliably.

Term

dielectric grease

Dielectric grease is a silicone-based paste used on electrical connectors to help repel water and reduce corrosion. It’s typically applied sparingly so it doesn’t interfere with the actual metal-to-metal contact points.

Term

multi-purpose lubricant

A multi-purpose lubricant is a spray or liquid meant to reduce friction and help with a few different maintenance jobs. Here it’s mentioned as part of keeping battery/electrical connections in good shape.

Term

battery acid

Battery acid is the corrosive liquid inside many car batteries. If it gets on or near the terminals, it can eat away at the metal and cause corrosion that affects starting and charging.

Term

foaming cleaner

A foaming cleaner is a battery-cleaning product designed to cling to the surface while it works. The foam helps keep the chemical in contact with grime and corrosion long enough to dissolve it.

Term

battery terminal protector

A battery terminal protector is a protective coating you put on after cleaning. It helps keep water and dirt from causing corrosion on the battery connections.

Term

battery terminal cleaner

A battery terminal cleaner is a product that cleans the metal contacts on your car battery. If those contacts get dirty or corroded, the battery may not connect well—cleaning them helps the car start reliably.

Term

electronic parts cleaner

This is a special spray that cleans dirty electrical connections. It helps remove gunk that can cause buttons or radios to act up.

Brand

CRC electronics cleaner

CRC is a brand that makes cleaning sprays for electronics. The host is saying this specific cleaner helped fix problems caused by dirty electrical connections.

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