How to Ship Auto Parts by LTL Freight (2026)

Auto parts are some of the trickiest freight to ship well. Some are heavy and dense (engines, transmissions, brake rotors), some are awkward and fragile (bumpers, hoods, glass, radiators), and a few are regulated (batteries, airbags, aerosols). Shipped by LTL freight — on a pallet or in a crate, picked up and delivered by truck — nearly all of it moves safely and affordably, as long as it is prepared the way carriers expect. This guide covers the whole process: how auto parts are classed, which parts are hazmat, how to pack each type of part, how to build and secure the pallet, what loading and delivery day look like, and how to keep fees and damage claims down.

Can you ship auto parts by LTL freight?

Yes — LTL (less-than-truckload) is the standard way to move auto parts that are too heavy, too large or too many for a parcel carrier. Parcel services such as UPS and FedEx Ground generally stop at 150 lb per package and about 108 inches in length, and they add large-package and additional-handling surcharges well before those limits. With LTL you pay for the space your freight takes on the truck, and it travels palletized, so it is handled with a forklift instead of by hand. If you are new to how it works, start with what LTL freight is.

How LTL handling affects the way you pack

Your parts do not ride alone in a dedicated truck. A driver picks them up, the pallet is unloaded at an origin terminal, sorted, loaded onto a line-haul trailer with other shippers’ freight, often transferred through another terminal, and finally put on a local truck for delivery. Every transfer is another forklift touch. Pack for that reality:

• Forklifts will pick the load up. It needs a real pallet or skid with room for forks, not loose parts sitting on the floor.
• Other freight will sit next to it, and possibly on it. Sharp edges, protruding studs and soft panels need protection from freight that shifts against them.
• It will vibrate for hundreds of miles. Anything not fastened will walk, rub and loosen.
• The trailer is not climate controlled. Bare steel can pick up rust from condensation; paper-based packaging that gets wet loses strength.

Auto parts freight class (NMFC) in 2026

Freight class is the NMFC category carriers use to price a shipment — the higher the class, the higher the rate. It has always depended on density, handling and liability, but on July 19, 2025 the National Motor Freight Traffic Association (NMFTA) changed the rules: a long list of commodity-specific items, including most automobile parts, moved to density-based classes on a 13-step scale. For most auto parts that means your class is set by the density (pounds per cubic foot) of the shipment as it is handed to the carrier — pallet, crate and packaging included. Our freight class guide explains the system in full.

Here is what that looks like for common auto-parts shipments. Volume is length × width × height in inches ÷ 1,728, using the outside dimensions of the finished load including the pallet.

These are illustrations, not quotes. They assume the density scale applies; some commodities (batteries, tires and glass, for example) can carry their own NMFC items, and the carrier’s inspected weight and dimensions set the final billed class. To test your own numbers before you book, use the planner below, the density calculator or the freight class calculator.

Auto parts freight class & pallet planner

Pick the part you are shipping, enter the weight and height of the finished load, and see its density, estimated freight class, and what a different base would do to it. Then get a packing checklist and a bill of lading description.

Before you pack: preparation checklist

Hazmat auto parts: what cannot just go on a pallet

Several ordinary-looking auto parts are regulated hazardous materials under the U.S. Department of Transportation rules in 49 CFR. The shipper is responsible for identifying, packaging and declaring them. Undeclared hazmat can mean a refused load, a re-billed shipment, and fines. A hazmat shipment needs the proper shipping name, UN number, hazard class and an emergency contact on the bill of lading, plus the right labels, and carriers add a hazmat fee. This table is a general overview, not legal advice — confirm details with your carrier.

When you request a quote, say up front if any part on the pallet falls into this table. Hazmat can narrow the carriers that will quote the load, and quoting it as ordinary freight and revealing the hazmat at pickup is how shipments get turned away.

How to pack auto parts by type

The goals are the same for every part: protect fragile surfaces, immobilize the part so it cannot move, keep its weight inside the pallet edges, and keep fluids, sharp edges and loose pieces from harming other freight. Here is how that works for the parts shippers send most often.

Weights are typical ranges for illustration. Always use the actual scale weight.

Engines

An engine is dense and heavy, and its weight sits in a small footprint, which makes it the part most likely to break through a poorly secured pallet.

• Drain oil, coolant and fuel, and wipe the outside clean. Remove or secure anything that sticks out — alternators, brackets, sensors and manifolds can be knocked off or can pierce neighboring freight.
• Cap or plug every opening (intake, exhaust ports, oil and coolant ports) and wrap the engine in heavy plastic sheeting to keep out dirt and moisture.
• Bolt the engine through its mounting points to an engine stand or a heavy-duty pallet, using bolts with large washers so the load spreads over the deck boards. Add 2×4 blocking on all sides so it cannot slide, then strap it down over the block with edge protection.
• Keep the engine centered and fully inside the pallet edges. Mark the pallet with the weight and “Do not stack”.
• For remanufactured or high-value engines, use a framed wood crate instead of an open pallet.

Transmissions, transfer cases and differentials

• Drain the fluid and plug the cooler-line ports, input shaft and tail housing so dirt cannot get in.
• Secure the torque converter with a strap or tape (or remove and pack it separately) so it cannot slide forward and spill out.
• Keep the unit in its normal upright orientation, strapped into a wood cradle or bolted to a small skid. This is the part where footprint matters most for class — see the transmission example above.
• Wrap in plastic and protect the output shaft and splines with a cap or cardboard sleeve.

Wheels, rims and tires

• Stack wheels flat in interlocked layers. Put corrugated or foam sheets between faces so polished, chrome or painted surfaces do not rub, and box or sleeve premium wheels individually.
• Stack tires flat as well, in a stable pattern, and wrap the whole stack to the pallet. A tall, narrow stack of tires tips; keep the height reasonable and stay inside the pallet edges.
• Band in both directions with corner protectors, then stretch wrap the full load, overlapping the pallet base so the load and pallet behave as one unit.

Bumpers, fenders, hoods and doors

• Body panels are large, light and easy to scratch, dent or flex. Ship them on edge in a rack or A-frame where possible; if stacked flat, put cardboard or foam between each piece and keep the stack short.
• Protect painted or primed faces with foam or soft wrap, and put edge protectors on the corners.
• Strap against corner boards instead of directly on the panel. Straps pulled tight across a hood or bumper cover will bow it.
• For high-value or freshly painted panels, build a crate or rack. A thin box around a loose stack does not protect against a pallet shifting next to it.

Glass, mirrors, headlights and tail lights

• Wrap each piece individually in foam or bubble wrap, then box with cushioning on every side, leaving no room for it to move.
• Ship upright on the long edge in a crate or rack, never flat under other pieces. Mark the carton, but do not rely on “Fragile” stickers to protect it.

Rotors, drums, axles, driveshafts and springs

• Heavy small parts need strong small boxes. Use double-wall cartons sized to the part rather than oversized boxes of loose rotors, and keep each box a weight one person can lift.
• Cap U-joints, splines and open ends on driveshafts and axles; protect CV boots. Long items may attract over-length charges, so give the carrier the real length.
• Bundle and band springs tightly. Never ship compressed springs loosely.
• Bare steel rusts in transit: a light oil coating or rust-inhibiting wrap helps on longer trips.

Exhaust parts and catalytic converters

• Wrap exhaust pipes, mufflers and tips in heavy paper or bubble wrap, and cap open ends. Sharp flanges cut cartons.
• Catalytic converters are theft targets because of their precious-metal content. Ship them in a plain, sealed box with no part or brand markings on the outside, and see the theft section below.

Radiators, condensers and intercoolers

• Cover both faces with rigid cardboard or foam so the fins are not crushed, and cap all ports. Drain coolant completely.
• Ship upright, mark them “Do not stack”, and keep other freight off the core.

Electronics, modules and sensors

• Anti-static bag first, then foam, then a rigid double-wall box. Add a desiccant pack for long trips or humid routes.
• Do not leave modules loose in a mixed carton, where heavier parts can crush them.

Small parts, hardware and filters

• Bag and label small parts, then group them in uniform double-wall master cartons filled so nothing rattles. Loose small boxes are the most common item lost or crushed on mixed pallets.
• Look for the box maker’s certificate on each carton (it states burst or edge-crush strength) and match the box to the weight inside.

How to build and secure the pallet, step by step

1. Choose a sound pallet. No cracked boards, protruding nails or rot. Use a heavy-duty or new pallet for engines and other dense loads, and check the rated capacity (see our pallet shipping guide for sizes and capacities).
2. Put the heaviest, densest parts at the bottom and center. Keep the center of gravity low and the weight spread across the deck.
3. Build interlocking layers. Alternate the direction of cartons each layer, like bricks, and keep everything flush with or inside the pallet edges. Overhang gets crushed and can raise your class.
4. Fill every void. Kraft paper, air pillows or foam keep parts from shifting. A load that can move will move.
5. Protect corners and edges with corner boards or edge protectors where straps and wrap would bite or where panels could bend.
6. Strap the load. Use poly or steel banding over the top and through the pallet, in both directions for dense loads. Snug, not crushing.
7. Stretch wrap the full load. Anchor the wrap to the pallet base first, then spiral up with overlap and back down, covering the top. Several wraps, not one.
8. Add a rigid top cap (cardboard or plywood) if the load can be stacked on. If it cannot, mark it “Do not stack” and tell the carrier — some carriers charge for the space above an unstackable pallet.
9. Check the height. Most carriers want a finished height of roughly 60 to 72 inches including the pallet; confirm your carrier’s limit before you build tall.
10. Weigh, measure and label. Put origin, destination, piece count and handling marks on at least two sides and the top, with the packing list in a pouch. Remove old labels, and keep brand names off high-value cartons.

Loading, pickup and delivery day

The carrier’s driver loads palletized freight with a pallet jack or forklift; drivers do not palletize loose parts or carry individual heavy items. That puts a few things in your hands:

Getting the pallet ready for pickup

• Have it complete and accessible. The pallet should be wrapped, labeled and sitting where a pallet jack can reach it on a hard, level surface during the pickup window.
• Know whether you have a dock. No loading dock or forklift means you need liftgate service. A home or home-based garage is a residential pickup. Both add fees — see accessorials below.
• Have the bill of lading ready. Our free bill of lading generator creates one with the weight, class, piece count and description the carrier expects.

Taking freight to the terminal yourself

If you drop the pallet at the carrier’s terminal, you skip pickup accessorials such as residential and liftgate fees. Load it onto a truck or trailer deck with a ramp or forklift, set it flat, and secure it with ratchet straps or load locks against the bed and the headboard so it cannot slide or tip. Keep the load within your vehicle’s payload rating; an engine pallet can weigh more than a pickup’s rated payload when the truck is also carrying passengers or gear.

Receiving on delivery

• Arrange a way to unload heavy parts before the truck arrives. An engine on a pallet cannot be unloaded by hand; if you have no dock, order liftgate delivery and have a pallet jack and helpers ready.
• Inspect before you sign. Count the pieces, check the wrap and corners, and write any damage or shortage on the delivery receipt. Photograph it. A clean signature makes a damage claim much harder.
• If damage shows up only after you open the packaging (concealed damage), report it to the carrier right away and keep the packaging for inspection.

Accessorial charges to expect on auto parts shipments

Accessorials are fees for services beyond standard dock-to-dock transport. Auto parts shipments trigger them often, because they come from garages, shops and homes. Our accessorial charge checker shows which apply to your shipment.

What it costs to ship auto parts by LTL

There is no flat price for auto parts shipping; the cost depends on the same factors as any LTL shipment, and the biggest ones are within your control:

• Freight class (density). The load size you tender sets the class — see the transmission example above.
• Weight and dimensions. Both feed density, so measure the finished pallet.
• Distance and lane. Rates vary by origin and destination, and by how much freight the carrier moves on that lane.
• Accessorials. Residential, liftgate, limited-access and hazmat fees can cost more than extra miles.
• The carrier you pick. The same freight is priced differently by different carriers.

That last point is large. In the real quotes in our pallet shipping guide, five carriers priced the same Charlotte, NC to Oceanside, NY pallet from $336.31 up to $467.74. For a deeper breakdown, see how much LTL freight costs, based on real quote data.

Used, salvage and remanufactured parts: paperwork, cores and liability

Used and rebuilt parts follow the same rules as new ones, with a few extra details that matter when something goes wrong.

• Describe condition honestly on the bill of lading (new, used, remanufactured, core). The description affects classification, carrier acceptance and liability.
• Cores: a core is a used part returned for credit. Label it as a core, keep it with the return paperwork, and drain and clean it like any other used part. A leaking core can be refused or treated as hazmat.
• Liability is limited by default. Carriers do not insure freight for its full value. Many carrier tariffs limit liability for used or reconditioned goods to cents per pound (at some carriers as low as about $0.10 per pound, with a maximum per shipment), and new freight to a per-pound ceiling. Read the liability terms on your quote, because a new part and a used part of the same value can have very different coverage.
• Add cargo insurance for the declared value of valuable parts. Third-party freight insurance covers what the carrier’s limit does not, and it often covers more causes of loss.
• Keep the paperwork: invoice, photos, packing list and the signed bill of lading.

If something does arrive damaged, the carrier is responsible within its liability limits, and under federal rules you file a written claim within 9 months of delivery. The carrier must acknowledge the claim within 30 days and pay, decline or make an offer within 120 days (see 49 CFR Part 370). Photos, the delivery receipt notation and an invoice for the part are the evidence that decides most claims.

High-value and theft-prone parts

Catalytic converters, ECUs, airbags, performance wheels and rebuilt engines are favorite targets for cargo theft because they are valuable and easy to resell. LTL carriers handle them every day, but it is worth reducing the odds:

• Use plain cartons or crates with no brand, part-number or “catalytic converter” markings on the outside.
• Seal with tamper-evident tape and photograph the sealed pallet from all sides.
• Record serial and part numbers before you ship, and keep the photos with the invoice.
• Where the lane allows it, ask for terminal pickup or delivery so the freight does not sit at an unattended address.
• Insure for the real value (see above).

Common mistakes that cause damage, fees and claims

• Guessing the weight or dimensions instead of weighing and measuring the finished pallet.
• Leaving fluids in engines, transmissions or fuel tanks.
• Shipping a battery or airbag as ordinary freight.
• Relying on stretch wrap alone for heavy parts instead of bolting or strapping them.
• Letting parts overhang the edges of the pallet.
• Using a damaged or underrated pallet for a dense load.
• Stacking flat body panels without foam or sheets between them, and strapping across them.
• Packing small parts loose instead of in labeled master cartons.
• Ordering a residential pickup when a terminal drop-off would have worked.
• Signing a clean delivery receipt without checking the freight.

Auto parts shipping checklist

• Drained, cleaned and capped every part that held fluid.
• Checked for batteries, airbags, aerosols and fuel-holding parts, and told the carrier.
• Parts labeled, photographed and listed on a packing list.
• Pallet or crate chosen to be the smallest stable base.
• Heavy parts bolted or strapped; layers interlocked; no overhang; voids filled.
• Load banded and stretch wrapped; corner protection and top cap added.
• Finished load weighed and measured; class estimated with the calculators.
• Labels on two sides and the top; bill of lading complete and accurate.
• Pickup and delivery access confirmed; liftgate ordered only if needed.
• Insurance reviewed, and a plan to inspect and note damage at delivery.

Frequently asked questions

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