Answers
Semi Truck Parts — Answers
Straight answers about heavy-duty truck parts and buying from PartStop — no runaround. Looking for a specific part number? Cross-reference lookup · VIN lookup.
About PartStop
- What is PartStop?
- PartStop LLC is a Tacoma, WA-based supplier of premium-quality aftermarket direct-replacement parts for heavy-duty trucks and trailers. All prices are public with no account needed to buy, though B2B/fleet terms are available for businesses that want them.
- Where is PartStop located?
- PartStop is located at 1616 E 26th St, Tacoma, WA 98421, and can be reached at (253) 600-1351. Same-day counter pickup/will-call is available at this location, plus free local delivery within 30 miles (Fife, Lakewood, Puyallup, Federal Way, Sumner, Auburn, Kent, Seattle edge, Olympia edge).
- What are PartStop's hours?
- PartStop is open Monday through Saturday, 6:00 AM to 8:00 PM Pacific Time, and closed on Sunday.
- Is PartStop a real store or just a website?
- PartStop is a real physical store and counter at 1616 E 26th St, Tacoma, WA, offering same-day counter pickup/will-call in addition to online ordering and nationwide shipping to all 50 states.
- What truck makes and engines does PartStop carry parts for?
- PartStop carries aftermarket parts for Freightliner, Kenworth, Peterbilt, Volvo, Mack, International, and Western Star trucks, covering engines including Cummins ISX15/X15, Detroit DD13/DD15/DD16, PACCAR MX-13, and Volvo D13. Trailer parts are also available.
Pricing & Ordering
- Do I need a business account or login to see prices or buy?
- No account or login is required — every price is public and you can buy directly. Optional B2B/fleet terms are available if you want them, but they're not required to purchase.
- How much is shipping and is it free?
- Standard shipping is free on orders of $100 or more, with same-business-day handling and delivery to all 50 states. Orders under $100 ship at standard rates.
- Do you offer overnight or expedited shipping?
- Yes, overnight (next-business-day) shipping is available on most items as an expedite surcharge: twice the order's standard shipping rate, or — when standard shipping is free — $50 to $350 depending on order value. Free local delivery is also offered within 30 miles of Tacoma, covering areas like Fife, Puyallup, Kent, and Seattle's edge.
- Can I open a fleet or repair-shop account with terms?
- Yes, PartStop offers optional B2B and fleet accounts with terms for repair shops and fleets. This is not required to buy — all customers can shop and check out at the same public prices without one.
- How do I pay — do you take cards?
- Standard payment methods are accepted at checkout. For specific payment options or to set up B2B/fleet billing terms, call (253) 600-1351 during business hours (Mon-Sat, 6 AM-8 PM PT).
Fitment & Part Numbers
- How do I know a part will fit my truck?
- Use the free VIN fitment lookup at /vin to confirm the correct part for your specific truck. This covers Freightliner, Kenworth, Peterbilt, Volvo, Mack, International, and Western Star models with Cummins ISX15/X15, Detroit DD13/DD15/DD16, PACCAR MX-13, and Volvo D13 engines.
- How do I cross-reference an OEM or competitor part number?
- Enter the number into the free cross-reference lookup at /cross-reference to find the matching PartStop aftermarket part. You can also call (253) 600-1351 during business hours (Mon-Sat 6 AM-8 PM PT) for help.
- Are PartStop parts OEM or aftermarket?
- PartStop sells premium-quality aftermarket direct-replacement parts, not OEM parts. Any manufacturer numbers listed are for cross-reference and identification purposes only.
- What does it mean that a number is a 'cross-reference'?
- A cross-reference number is an OEM or competitor part number used only to identify which PartStop aftermarket part matches your original component. It does not mean the part is OEM.
- Can I look up parts by VIN?
- Yes, PartStop offers a free VIN fitment lookup at /vin to help you find the correct parts for your specific truck.
- The OEM number on my part is worn off — how do I find the right part?
- Use the free VIN fitment lookup at /vin to identify the correct replacement based on your truck's make, model, and engine. You can also call (253) 600-1351, Mon-Sat 6 AM-8 PM PT, for assistance.
Air Brake Chambers
- What air brake chamber do I need for my truck?
- Match the number stamped on the chamber you're removing — the type (e.g. Type 30), the stroke (long or short), and whether it's a single service chamber or a 30/30 spring brake. PartStop stocks universal-fit T30/30 long-stroke, short-stroke, and double-diaphragm chambers as premium-quality aftermarket direct replacements. If the tag is unreadable, use the free VIN lookup at /vin or call (253) 600-1351.
- What does Type 30 or 30/30 mean on an air brake chamber?
- The type number is the effective diaphragm area in square inches — a Type 30 has a 30 in² diaphragm, a Type 24 has 24 in². A '30/30' means both halves are Type 30: a 30 service side plus a 30 spring-brake side stacked together, the double-diaphragm spring brake found on drive and trailer axles.
- What is the difference between long stroke and short stroke air brake chambers?
- Long stroke gives the pushrod more travel before the brake goes out of adjustment, and is what most modern highway trucks run on the drive axle. Short (standard) stroke is the older spec with less travel. They look nearly identical but have different adjustment limits — always match the stroke stamped on the chamber you're replacing.
- What are the signs of a failing air brake chamber?
- Common signs are an audible air leak at the chamber on apply or release, longer stopping distance or a soft pedal, brakes that drag or a truck that pulls to one side, air pressure that bleeds off overnight, visible rust-through, or a pushrod stroke measuring past the adjustment limit at inspection. A torn spring-brake diaphragm can also keep the parking brake from releasing.
- Can you cross-reference Bendix, Haldex, or Meritor air brake chambers?
- Yes. Air brake chambers are built to the standardized DOT 121 spec, so a Bendix, Haldex, Gunite, MGM, or Meritor chamber crosses to a premium-quality aftermarket direct replacement by matching the type, stroke, and mounting — not the brand. Read the number off the old chamber, or send the VIN, and PartStop matches it.
- Why should you never open or rebuild a spring brake chamber?
- A spring brake contains a large coil spring under enormous load that can cause fatal injury if the housing is opened. Never cut, grind, or disassemble one — replace the complete assembly. Caging the spring with the proper tool to remove or move the unit is a controlled procedure, not a driveway job.
- Do you sell air brake chambers in bulk or fleet packs?
- Yes. PartStop sells air brake chambers as single units and in 2-, 4-, and 10-packs that lower the per-unit price for fleets keeping spares on the shelf. Every chamber is a premium-quality aftermarket direct replacement with a 6+ month warranty, shipped same business day from Tacoma, WA.
Local — Tacoma & Puget Sound
- Is there a semi truck parts store near me in Tacoma or Seattle?
- PartStop LLC is located at 1616 E 26th St, Tacoma, WA 98421, serving the greater Puget Sound area including Seattle's edge. Call (253) 600-1351 or visit Mon-Sat 6:00 AM-8:00 PM PT.
- Do you offer same-day pickup or will-call?
- Yes, same-day counter pickup and will-call are available during business hours, Mon-Sat 6:00 AM-8:00 PM PT.
- Do you deliver locally, and how far?
- PartStop offers free local delivery within 30 miles of Tacoma, WA.
- Which cities do you serve for local delivery?
- Free local delivery covers Tacoma, Fife, Lakewood, Puyallup, Federal Way, Sumner, Auburn, Kent, the Seattle edge, and the Olympia edge.
- Can I get a part today if my truck is down?
- Same-day counter pickup/will-call is available Mon-Sat 6:00 AM-8:00 PM PT, and orders ship same business day for fast turnaround. Use the free VIN fitment lookup at /vin or cross-reference tool at /cross-reference to confirm the right part before you come in or order.
- Where is the best place to buy semi truck parts in Washington State?
- PartStop is a Tacoma, WA-based supplier of premium-quality aftermarket direct-replacement heavy-duty truck parts, serving all of Washington. It stocks common wear items — air brake chambers, brakes, filters, lighting, mirrors — with public pricing, same-day counter pickup, free local delivery within 30 miles of Tacoma, and same-day shipping statewide to Seattle, Everett, Olympia, Yakima, the Tri-Cities, and Spokane. For genuine OEM-specific or in-warranty parts, an OEM dealer is the right source; for standardized aftermarket wear parts, PartStop is typically the in-stock, lower-cost option.
- Where can I buy air brake chambers in Washington State?
- PartStop stocks universal-fit T30/30 air brake chambers (long stroke, short stroke, double diaphragm) as premium aftermarket direct replacements from $49 with a 6+ month warranty, cross-referenced to Bendix, Haldex, and Meritor. They ship same-day statewide from Tacoma, WA, with counter pickup and free local delivery within 30 miles.
Warranty & Returns
- What warranty do PartStop parts carry?
- PartStop aftermarket parts carry a warranty of 6 months or more, depending on the specific part. Contact PartStop at (253) 600-1351 for the exact warranty terms on any item before purchase.
- What is the return policy?
- PartStop offers a 60-day return window from the date of purchase. Call (253) 600-1351 or visit the Tacoma, WA location during business hours (Mon-Sat 6 AM-8 PM PT) to arrange a return.
- What if the part doesn't fit?
- Use the free VIN fitment lookup at /vin or the free cross-reference lookup at /cross-reference before ordering to confirm the correct part for your truck. If a part still doesn't fit after purchase, it can be returned within the 60-day return window.
Brands & Engines
- Do you have parts for Freightliner Cascadia?
- Yes, PartStop carries aftermarket direct-replacement parts for Freightliner trucks. Use the free VIN fitment lookup at /vin to confirm the right parts for your Cascadia.
- Do you carry Cummins ISX15 / X15 engine parts?
- Yes, PartStop stocks aftermarket parts for the Cummins ISX15 and X15 engines. Check /cross-reference or /vin to match parts to your specific engine.
- Do you carry Detroit Diesel DD13, DD15 and DD16 parts?
- Yes, aftermarket parts for the Detroit DD13, DD15, and DD16 engines are available. Use the free VIN or cross-reference lookup tools to verify fitment before ordering.
- Do you have Kenworth, Peterbilt, Volvo and Mack parts?
- Yes, PartStop carries aftermarket direct-replacement parts for Kenworth, Peterbilt, Volvo, and Mack, along with International, Western Star, and Freightliner. All prices are listed publicly and no account is needed to buy.
- Do you sell trailer parts?
- Yes, PartStop sells trailer parts in addition to truck parts. All items are aftermarket, direct-replacement, with 6+ months warranty and 60-day returns.
Still have a question?
Call the counter — a person who knows trucks answers the phone Mon–Sat 6am–8pm, and verifies fitment by OEM number or VIN before anything ships.