Used Trucks and Trailers Industry Terminology

ABS (Anti-lock Braking System)

A safety system that prevents wheel lockup under hard braking, preserving steering control and reducing stopping distances on slippery surfaces. Essential on modern tractors and trailers and often inspected during reconditioning.

- The truck’s ABS light is on; we’ll scan for wheel-speed sensor faults before resale. - Spec includes ABS on both tractor and trailer to reduce jackknife risk. - Buyer wants confirmation the ABS module was replaced during recon.

APU (Auxiliary Power Unit)

A small engine or battery-based system that provides cab climate control and electrical power without idling the main engine, improving fuel economy and driver comfort while reducing wear and emissions.

- The sleeper’s diesel APU can cut idling and save 1–2 gallons per hour. - A unit with a newer battery APU is more attractive in no-idle states. - We added APU details to the listing to justify the premium price.

Axle Rating

The maximum load an axle can safely carry as specified by the manufacturer. Matching axle ratings with tires, suspension, and brake components is critical for legal compliance and payload planning.

- With 12K steer and 40K drive axle ratings, this spec suits heavy regional work. - Trailer axle rating is 20K per axle; check tires and suspension match the rating. - Confirm the axle rating to ensure compliance with bridge laws and permits.

Bill of Sale

A legal document that records the transfer of ownership from seller to buyer, typically listing the vehicle identification, price, terms, and odometer disclosure where required.

- We’ll include VIN, sale price, and as-is terms on the bill of sale. - Finance needs a signed bill of sale before funding the deal. - Title and bill of sale must match the selling entity’s name.

CARB Compliance

Adherence to California Air Resources Board emissions rules for diesel trucks and transport refrigeration units. Often requires newer engines, verified after-treatment systems, and documented compliance for operation in California.

- This tractor’s 2015 engine is CARB-compliant for California operation. - Verify TRU compliance dates before sending the reefer into California. - The buyer asked for CARB certificates and EO numbers during due diligence.

CDL (Commercial Driver’s License)

A driver’s license certification required to operate commercial motor vehicles above specific weight and use thresholds, with endorsements for air brakes, tankers, doubles, and hazmat.

- A CDL is required to test drive the tractor on public roads. - The buyer’s CDL restrictions prevent them from operating doubles. - Our yard driver has a CDL so he can move units for PDI road tests.

Curb Weight

The weight of a vehicle with standard equipment, fluids, and a full tank of fuel, but without driver, passengers, or cargo. Used to estimate payload capacity.

- The curb weight is 18,500 lb; payload depends on GVWR and upfit. - Curb weight increased after adding the wet kit and headache rack. - Use curb weight to estimate legal payload on the bill of lading.

DPF (Diesel Particulate Filter)

An emissions device that traps soot in the exhaust stream and periodically regenerates to burn it off. Requires proper maintenance, correct engine tune, and low-ash oil to function reliably.

- DPF ash load is at 70%; a bake and clean is due before delivery. - Frequent parked regens suggest an upstream EGR issue. - We included a fresh DPF service in the reconditioning notes.

DOT Inspection

Safety inspections governed by the U.S. Department of Transportation and FMCSA, ranging from full vehicle checks (Level I) to driver or vehicle-only reviews, including the required annual inspection.

- The truck passed a Level I DOT inspection last week. - We complete an annual DOT inspection as part of make-ready. - Several roadside DOT violations led to an OOS order for the trailer.

EGR (Exhaust Gas Recirculation)

An emissions system that recirculates a portion of exhaust gases back into the intake to reduce combustion temperatures and NOx formation. Requires regular maintenance to prevent clogging and leaks.

- The EGR cooler was replaced 20K miles ago; paperwork on file. - Excessive NOx codes point to a sticking EGR valve. - We verified no EGR leaks during the PDI smoke test.

ELD (Electronic Logging Device)

A device that automatically records a driver’s Hours of Service by interfacing with the vehicle’s engine data, replacing most paper logs and improving compliance tracking.

- The tractor is ELD-ready with a 9-pin diagnostic port. - Fleet buyers asked whether the units can integrate with their ELD provider. - Post-sale support included ELD install and driver training.

Engine Hours

A measure of cumulative run time on the engine. Useful alongside mileage to gauge idling, duty cycle, and overall wear in tractors and TRUs.

- 12,000 engine hours with 450K miles suggests moderate idling. - The buyer compares engine hours across units to estimate wear. - We included engine hours on the spec sheet for transparency.

EPA 2010/2017 Emissions Standards

Key U.S. emissions and efficiency milestones for heavy-duty vehicles. 2007 introduced DPFs; 2010 widely adopted SCR/DEF; 2017 added greenhouse gas and fuel efficiency requirements.

- EPA 2010 engines typically use SCR with DEF and a DPF. - 2017 GHG rules drove aero, tire, and powertrain efficiency improvements. - The listing tags the truck as EPA 2010-compliant for nationwide resale.

FET (Federal Excise Tax)

A 12% tax on the first retail sale of certain new heavy trucks, tractors, and trailers and on some taxable add-ons. Generally not applied to used equipment if FET was previously paid.

- No FET on this used trailer; it was previously taxed when new. - Major reconfigurations could trigger FET—confirm with your tax advisor. - Pricing a new glider-like build may have FET implications.

Fifth Wheel

The tractor-mounted coupling device that locks onto a trailer’s kingpin. Key parameters include height, slider travel, lubrication type, and jaw condition.

- The slider fifth wheel allows axle weight adjustments. - We measured fifth wheel height to match the fleet’s trailer spec. - Excess play suggests the jaw and kingpin need inspection.

Floorplan Financing

A revolving line of credit used by dealers to finance inventory. Lenders charge interest and curtailments and conduct audits until units are sold and paid off.

- Our floorplan has 90-day curtailments on used tractors. - Expect periodic audits to verify inventory location and condition. - We watch aging to avoid high floorplan interest costs.

GAWR (Gross Axle Weight Rating)

The maximum distributed weight that may be supported by a vehicle axle, determined by the weakest component of axle, suspension, wheels, and tires.

- Spec shows 12K GAWR on the steer and 40K on the tandem. - Tire load indexes must meet or exceed the GAWR. - Overloading GAWR risks citations and component failure.

Glider Kit

A new rolling chassis sold without engine, transmission, or rear axles, often assembled using remanufactured pre-emission drivetrains. Offers lower emissions complexity but faces regulatory limitations.

- This is a 2016 glider with a pre-emission reman engine. - Some lanes restrict gliders due to emissions policies. - Verify documentation on the donor engine and assembly.

GVWR (Gross Vehicle Weight Rating)

The maximum allowable total vehicle weight, including chassis, body, fuel, driver, passengers, and cargo, as set by the manufacturer. For combinations, consider GCWR and bridge laws.

- The GVWR is 80,000 lb combined within federal limits with a standard 5-axle set. - Upfit choices must keep payload within GVWR. - Registration fees and IRP may depend on declared GVWR.

HOS (Hours of Service)

FMCSA rules that limit driving and on-duty time to improve safety. ELDs automate recording and help carriers manage compliance.

- The unit is ELD-equipped for HOS compliance. - New drivers asked for HOS training during handover. - Violations can lead to OOS orders and fines.

Horsepower and Torque

Power (horsepower) reflects work over time; torque is rotational force. Torque at low RPM affects startability and gradeability; horsepower influences top speed and sustained pulling.

- We selected higher torque at lower RPM for vocational hauling. - The buyer prefers 455 HP with 1,650 lb-ft for regional work. - Dyno sheets show healthy torque curve post-overhaul.

In-Frame Overhaul

An engine rebuild performed without removing the engine block from the chassis, typically replacing liners, pistons, bearings, and related components. Documentation significantly affects value.

- In-frame overhaul with liners and bearings done at 650K; receipts included. - Compression and oil analysis support the quality of the in-frame. - In-frame rebuilds help resale without removing the block.

IRP (International Registration Plan)

A reciprocity agreement among U.S. states and Canadian provinces for commercial vehicle registration, apportioning fees based on distance traveled in each jurisdiction.

- Apportioned plates under IRP allow multi-state operation. - Title transfer is done; now we’ll help the buyer with IRP registration. - Fees vary by weight and miles reported in each jurisdiction.

Jake Brake (Engine Brake)

A compression-release engine braking system that slows the vehicle by altering valve timing, reducing service brake use and improving downhill control.

- The Jake brake helps control speed on steep grades. - Municipalities may restrict Jake brake use due to noise. - We verified the engine brake stages function during road test.

Kingpin

The steel pin under a trailer that locks into the tractor’s fifth wheel. Its position and wear are critical for safe coupling, turning clearance, and weight distribution.

- We measured kingpin wear to ensure proper coupling. - The buyer’s trailers use a 36-inch kingpin setting; check swing clearance. - A damaged kingpin can cause latch issues at the fifth wheel.

Lease-Purchase Agreement

A financing structure where an operator leases a truck with the option or obligation to purchase it at term end. Terms, residual value, maintenance responsibilities, and disclosures vary by program.

- The driver chose a 36‑month lease-purchase with a balloon. - Terms include a maintenance escrow and limited warranty. - We reviewed effective APR before recommending the lease-purchase.

Liftgate

A hydraulic or electric platform mounted to the rear of a box truck or trailer to load and unload freight without a dock. Types include tuck-under, railgate, and cantilever.

- Railgate vs tuck-under liftgate depends on dock height and freight. - We replaced the liftgate pump during recon. - Spec includes a 3,000‑lb capacity aluminum liftgate.

Make-Ready/Reconditioning (Recon)

The process of preparing used equipment for resale, including mechanical repairs, safety checks, cleaning, cosmetic touch-ups, and completing required inspections.

- Recon included detail, DPF service, tires, and DOT inspection. - We budget $3,000 per unit for make-ready on average. - Documentation of recon increases buyer confidence and price.

O/O (Owner-Operator)

A driver who owns and operates their own truck, often responsible for equipment selection, financing, maintenance, and compliance.

- The spec appeals to O/Os: APU, premium interior, and 13‑speed. - Our marketing targets O/Os with lease-purchase options. - Service plans tailored for O/O cash flow are a selling point.

Odometer Disclosure Statement

A federally required statement documenting the mileage at transfer of ownership for most vehicles under a defined age threshold, aimed at preventing odometer fraud.

- We provide a federal odometer disclosure at delivery. - Older units may qualify for disclosure exemptions depending on model year. - Title and odometer disclosure must match the VIN.

Out-of-Service (OOS) Order

An enforcement action that prohibits a vehicle or driver from operating until safety defects or regulatory violations are corrected, typically resulting from DOT roadside inspections.

- A brake violation put the trailer OOS until repairs were made. - The buyer wanted a clean OOS history before purchase. - OOS orders impact CSA scores and insurance rates.

PDI (Pre-Delivery Inspection)

A comprehensive inspection performed by the seller before delivering a used unit to ensure it meets safety, operational, and contractual standards.

- PDI includes road test, fault code scan, lights, leaks, and brakes. - We found a weak battery during PDI and replaced the set. - The PDI checklist is attached to the deal jacket.

Pre-Emission / Pre-DEF

Industry shorthand describing trucks built before modern after-treatment systems. Pre-DEF usually means no SCR/DEF (circa pre-2010), while pre-emission often refers to pre-2007 engines without DPFs.

- Many buyers seek pre-DEF units to avoid SCR complexity. - Pre-emission can refer to pre-2007 engines without DPFs. - We clarified that a 2009 may be pre-DEF but still has a DPF.

Price Digests (Truck Blue Book)

A widely used valuation resource for commercial trucks and trailers, historically known as Truck Blue Book, providing retail and wholesale values and specification data.

- We used Price Digests wholesale values to set the floor price. - Lenders asked for a Price Digests valuation with photos. - The appraisal blended Price Digests and live comps from auctions.

PTO (Power Take-Off)

A mechanism that transfers engine power to auxiliary equipment, commonly used to drive hydraulic pumps for dumps, roll-offs, tankers, and other vocational upfits.

- The PTO powers the dump trailer’s hydraulic pump. - Spec includes hot-shift PTO controls in-cab. - We installed a PTO to support a new wet kit for lowboy service.

Reefer (Refrigerated Trailer)

A trailer equipped with an insulated box and a transport refrigeration unit to maintain temperature-controlled cargo. Key factors are unit hours, maintenance, and compliance.

- The reefer unit has 12,000 hours and recent compressor work. - We provided a 3‑zone temp recorder printout for the reefer. - CARB TRU compliance dates matter for California lanes.

Retread (Tires)

A process where a worn tire casing receives a new tread, lowering cost per mile. Acceptance varies by position, policy, and intended duty cycle.

- Retreads are okay on drives and trailers but not on steer axles. - We sourced SmartWay retreads to improve fuel economy. - The buyer wants casings suitable for multiple retread cycles.

ROI (Return on Investment)

A financial metric comparing the gain from an investment to its cost, used to evaluate recon, upfits, technology, and marketing initiatives in used equipment operations.

- Adding APUs showed a 14‑month ROI for our regional fleet. - Recon spend increased gross by $4,000 per unit—solid ROI. - Telematics ROI came from reduced idle and better routing.

Suspension: Air Ride vs Spring Ride

Common trailer and tractor suspension types. Air ride uses air bags for smoother ride and cargo protection; spring ride uses leaf springs for lower cost and simplicity.

- Air ride improves ride quality and resale on van trailers. - Spring ride is cheaper and lighter for certain vocational specs. - Buyer requested air dump valves for easier docking.

Telematics

Onboard technology for tracking location, driver behavior, engine diagnostics, and asset utilization. Enables compliance, maintenance, and operational optimization.

- The fleet wants telematics for GPS, fuel, and fault codes. - We confirmed the unit is compatible with their telematics provider. - Telematics data supports predictive maintenance and resale value.

Title Washing

An illegal practice of transferring a vehicle across jurisdictions to conceal or remove brandings like salvage or rebuilt from the title history.

- NMVTIS check ensures the title wasn’t washed from salvage to clean. - The dealer flagged a potential title wash during intake. - We refuse consignments with title discrepancies.

TRU (Transport Refrigeration Unit)

The self-contained diesel or electric refrigeration system mounted on a reefer trailer or box, with its own engine hours, maintenance, and emissions rules.

- The TRU had a recent PM and passed a pre-trip. - Check TRU hours and CARB ATCM compliance dates. - We replaced the TRU belts and tensioner during recon.

UCC-1 Filing

A legal form that a creditor files to perfect a security interest in collateral under the Uniform Commercial Code, common in equipment and inventory financing.

- The lender recorded a UCC-1 on the truck as collateral. - Get the UCC-3 termination when the loan is paid off. - Floorplan lenders file blanket UCC-1s against inventory.

Upfit

Adding or modifying bodies, equipment, or accessories to tailor a chassis to a specific vocation, such as dumps, service bodies, liftgates, and wet kits.

- The flatbed upfit includes a crane, outriggers, and headache rack. - Lead times for upfits affect days to turn and floorplan costs. - Residual values depend on how niche the upfit is.

VIN (Vehicle Identification Number)

A unique 17-character identifier that encodes manufacturer, model, engine, and other attributes. Used for titling, history checks, and parts compatibility.

- The VIN decodes to a 2018 model with a 6x4 axle config. - We verified VIN matches the title and frame stamping. - Lenders require VIN photos to fund the deal.

Vocation (Vocational Spec)

The intended use-case for a truck or trailer (e.g., construction, regional haul, foodservice), guiding specifications for durability, gearing, upfits, and compliance.

- Spec’d for construction vocation with high-torque gearing. - The buyer asked for a vocational bumper and PTO provisions. - Vocation drives choices in axles, suspension, and transmissions.

Wheelbase

The distance from the front axle to the center of the drive axle group. Affects ride, maneuverability, weight distribution, and legal length constraints.

- A longer wheelbase improves ride but impacts turning radius. - Bridge law compliance depends partly on wheelbase. - The buyer needs a 244-inch wheelbase for tank trailer clearance.

Wet Kit

A hydraulic system on the tractor—reservoir, pump, PTO, valves, and hoses—used to power external equipment like dumps, lowboys, and walking floors.

- The truck includes a wet kit for the end-dump trailer. - We installed a larger reservoir to prevent overheating. - Verify valve type and flow rate to match the application.

Yard Truck (Yard Goat/Terminal Tractor)

A specialized tractor for moving trailers within yards and terminals, often with a hydraulic fifth wheel, short wheelbase, and visibility features; some are configured for on-road use.

- Off-road yard trucks aren’t spec’d for highway use. - DOT-ready yard goats command higher resale. - The spotter’s single-seat cab and hydraulic fifth wheel speed moves.

YMM (Year, Make, Model)

A shorthand used in inventory and marketing to identify the vehicle’s year, manufacturer, and model for classification and comparables.

- Search filters by YMM to find comparable units. - The listing title starts with YMM for better SEO. - Price comps were based on similar YMM and spec levels.