Northwest Axle Spindle provides professional spindle inspection, fitment verification, replacement, welding, and axle repair for commercial trucks and trailers. We source application-specific replacement components from established manufacturers, including Axle Spindle Inc.
Every axle must be inspected and measured before a replacement component is selected. Vehicle make and model alone are not enough to confirm spindle fitment.
Truck Applications
Truck Replacement Spindles
Replacement truck spindles may allow a damaged wheel end to be restored without replacing the complete axle assembly. Final repair suitability depends on the condition of the axle housing, the location and extent of the damage, the axle model, and the required spindle dimensions.
Highway Truck Spindles
Highway spindle applications include drive-axle configurations such as 4707, 4709, 4515, 4707-2, Bendix, and Allen-style spindles. Certain bolt-on assemblies may include a sleeve, gasket, and installation hardware.
Meritor Highway spindle applications
Meritor International 4700 applications
RR20-145 axle applications
MS1714X axle applications
MT40-14X axle applications
Kenworth T800 heavy-duty tandem drive axles
Selected Freightliner and heavy-duty crane axle applications
Meritor Highway and Meritor International 4700 spindle applications are not interchangeable. The axle model and existing component specifications must be confirmed before selection.
Meritor Highway, Meritor International 4700, RR20-145, MS1714X, MT40-14X, Kenworth T800 tandem drive, selected Freightliner and heavy-duty crane axles
Included spindle, sleeve, gasket, ABS mount or hardware
Certain bolt-on assemblies may include a sleeve, gasket and installation hardware. Inclusions vary by application.
Fitment warning
Meritor Highway and Meritor International 4700 spindle applications are not interchangeable. The axle model and existing component specifications must be confirmed before selection.
Physical measurements and axle identification are required to confirm this specification.
Component manufactured or supplied by Axle Spindle Inc. Fitment verification and installation provided by Northwest Axle Spindle.
Mack Truck Spindles
Replacement spindle options are available for selected Mack highway, vocational, and dump-truck axle applications. These components are designed for demanding commercial operating conditions and heavy axle loads.
Standard Mack highway trucks
Small and large Mack spindle configurations
Mack Granite dump trucks
S402R
S522R
S582
S652
GR64BR
Mack CH613 commercial hauling trucks
Fitment must be confirmed using the axle model, spindle dimensions, bearing information, and original component identification.
Mack highway, vocational and dump-truck axle applications
Compatible axle models
S402R, S522R, S582, S652, GR64BR, Mack Granite dump trucks, Mack CH613, small and large Mack spindle configurations
Fitment warning
Fitment must be confirmed using the axle model, spindle dimensions, bearing information and original component identification.
Physical measurements and axle identification are required to confirm this specification.
Component manufactured or supplied by Axle Spindle Inc. Fitment verification and installation provided by Northwest Axle Spindle.
Straight and Medium-Duty Truck Spindles
Straight-truck spindle options are available for selected Meritor and Spicer axle assemblies used under delivery trucks, box trucks, vocational trucks, and other medium-duty commercial vehicles.
Freightliner M2
Kenworth T380
Kenworth T480
International MV
International HV
Hino commercial trucks
Isuzu NPR 250
Isuzu NPR 550
Selected Meritor axles
Selected Spicer axles
A suitable replacement spindle may prevent the need to replace the complete axle, but repair time and suitability vary according to axle condition and application. Repair time depends on the axle application, the extent of the damage, component availability, and whether related wheel-end repairs are required.
Straight and medium-duty truck replacement spindle
Recommended application
Delivery, box, vocational and other medium-duty commercial trucks
Compatible axle models
Selected Meritor and Spicer axle assemblies used under Freightliner M2, Kenworth T380 and T480, International MV and HV, Hino, Isuzu NPR 250 and NPR 550
Fitment warning
Repair time depends on the axle application, the extent of the damage, component availability, and whether related wheel-end repairs are required.
Physical measurements and axle identification are required to confirm this specification.
Component manufactured or supplied by Axle Spindle Inc. Fitment verification and installation provided by Northwest Axle Spindle.
Heavy-Duty Pickup Truck Spindles
Direct-fit replacement options are available for selected heavy-duty pickup trucks, cab-and-chassis vehicles, and commercial vans. Applications may include both single-rear-wheel and dual-rear-wheel axle configurations.
Ford F-250
Ford F-250 Super Duty
Ford F-350
Ford F-350 Dually
Ford E-450
Ford F-550
Chevrolet 2500HD and 3500HD
GMC 2500HD and 3500HD
Duramax-equipped applications
GMC and Chevrolet 3500
GMC Express
RAM 3500 SRW
RAM 3500 DRW
Vehicle model information alone does not guarantee compatibility. Northwest must verify the axle, bearing, seal, locknut, and spindle measurements before installation.
Heavy-duty pickup and cab-and-chassis replacement spindle
Recommended application
Single-rear-wheel and dual-rear-wheel heavy-duty pickup and chassis-cab axles
Compatible axle models
Ford F-250, F-250 Super Duty, F-350, F-350 Dually, E-450, F-550; Chevrolet and GMC 2500HD, 3500HD and 3500; Duramax-equipped applications; RAM 3500 SRW and DRW
Fitment warning
Vehicle model information alone does not guarantee compatibility. Northwest must verify the axle, bearing, seal, locknut and spindle measurements before installation.
Physical measurements and axle identification are required to confirm this specification.
Component manufactured or supplied by Axle Spindle Inc. Fitment verification and installation provided by Northwest Axle Spindle.
Commercial Cargo Van Spindles
Commercial cargo vans may require a spindle configuration that differs from standard pickup-truck applications. Replacement options are available for selected 2500- and 3500-series Chevrolet Express and GMC Savana vans.
2500- and 3500-series commercial delivery and cargo vans
Compatible axle models
Chevrolet Express 2500 and 3500, GMC Savana 2500 and 3500, selected AAM 12-inch and AAM 10.5-inch rear axles
Physical measurements and axle identification are required to confirm this specification.
Component manufactured or supplied by Axle Spindle Inc. Fitment verification and installation provided by Northwest Axle Spindle.
Inspection Guidance
When Should a Truck Spindle Be Inspected?
Grinding, Squealing or Clunking
Noise from the wheel end during driving, turning, or braking can indicate bearing damage or wear on the spindle’s bearing surfaces.
Wheel Vibration or Excessive Hub Movement
A worn bearing journal can allow the hub to move on the spindle. If correct bearings do not eliminate the movement, the spindle and hub assembly require further inspection.
Excessive Wheel-End Heat
Abnormal heat can result from lubrication problems, bearing damage, incorrect bearing adjustment, or a damaged spindle surface.
Handling or Tire-Wear Problems
A bent or damaged spindle may affect wheel alignment, tire wear, vehicle tracking, and overall handling.
Visible Bending or Cracking
A visibly bent or cracked spindle is a serious structural concern. The unit should not be returned to service until the axle and spindle have been professionally inspected.
Replacing bearings or seals without identifying the underlying spindle damage can lead to repeat wheel-end failure.
Trailer Applications
Trailer Replacement Spindles
Northwest Axle Spindle services semi-trailers, commercial trailers, equipment trailers, cargo trailers, utility trailers, and selected specialty axle systems. Available component ranges include parallel, tapered, SAF Holland, utility-trailer, and lift-axle spindles.
Semi-Trailer Parallel Spindles
Parallel spindles, sometimes called straight spindles, use matching inner and outer bearing sizes. Available component ranges include 75, 85, and 115 series configurations for axle tubes generally measuring between 5 inches and 5¾ inches in outside diameter.
75 Series
85 Series
115 Series
Parallel or straight spindle design
Compatible sleeve selected according to axle dimensions
Heavy-duty semi-trailer applications
Northwest must measure the axle-tube outside diameter, inside diameter, and wall thickness before selecting the spindle and sleeve.
Heavy-duty semi-trailer axles with matching inner and outer bearing sizes
Compatible axle models
75, 85 and 115 Series configurations
Manufacturer-listed dimensions
Suited to axle tubes generally measuring between 5 inches and 5¾ inches outside diameter
Included spindle, sleeve, gasket, ABS mount or hardware
Sleeve selected according to measured axle dimensions
Fitment warning
Northwest must measure the axle-tube outside diameter, inside diameter and wall thickness before selecting the spindle and sleeve.
Physical measurements and axle identification are required to confirm this specification.
Component manufactured or supplied by Axle Spindle Inc. Fitment verification and installation provided by Northwest Axle Spindle.
Semi-Trailer Tapered Spindles
Tapered spindles use different inner and outer bearing sizes. They may also be described as step spindles because the bearing-journal diameter decreases toward the outer end.
75 Series
85 Series
115 Series
Tapered or step spindle design
Axle tubes generally between 5 inches and 5¾ inches
Application-specific sleeve selection
A parallel spindle must never be selected for a tapered application, or vice versa. Existing bearing numbers and spindle measurements must be confirmed.
Semi-trailer axles using different inner and outer bearing sizes
Compatible axle models
75, 85 and 115 Series configurations
Manufacturer-listed dimensions
Suited to axle tubes generally measuring between 5 inches and 5¾ inches outside diameter
Included spindle, sleeve, gasket, ABS mount or hardware
Application-specific sleeve selection
Fitment warning
A parallel spindle must never be selected for a tapered application, or vice versa. Existing bearing numbers and spindle measurements must be confirmed.
Physical measurements and axle identification are required to confirm this specification.
Component manufactured or supplied by Axle Spindle Inc. Fitment verification and installation provided by Northwest Axle Spindle.
SAF Holland Spindles — Left and Right
Application-specific left- and right-side replacement spindles are available for selected SAF Holland rear axle assemblies. The correct side and axle configuration must be identified before installation.
Left-side axle applications
Right-side axle applications
Selected SAF Holland rear axle assemblies
Side and axle configuration confirmed before installation
Commercial, cargo, utility and equipment trailer axles, including Dexter-compatible applications
Compatible axle models
5,200 lb, 7,000 lb, 9,000 lb, 10,000 lb and other application-specific axle capacities
Fitment warning
Axle capacity does not confirm fitment by itself. Bearing, seal, hub, brake and axle-tube measurements are also required.
Physical measurements and axle identification are required to confirm this specification.
Component manufactured or supplied by Axle Spindle Inc. Fitment verification and installation provided by Northwest Axle Spindle.
Trailer Lift-Axle Spindles
Replacement spindle options are available for selected Link lift-steer axle assemblies used on multi-axle commercial trailers. Correct fitment is important for maintaining wheel-end alignment when the axle is raised, lowered, or carrying weight.
Link lift-steer axle assemblies on multi-axle commercial trailers
Compatible axle models
Selected Link lift-steer axle applications
Fitment warning
Correct fitment is important for maintaining wheel-end alignment when the axle is raised, lowered or carrying weight. Bearing and locknut verification is required.
Physical measurements and axle identification are required to confirm this specification.
Component manufactured or supplied by Axle Spindle Inc. Fitment verification and installation provided by Northwest Axle Spindle.
Inspection Guidance
When Should a Trailer Spindle Be Inspected?
Wheel Wobble or Vibration
Excessive hub movement may indicate wear on the spindle’s bearing journals, damaged bearings, an incorrectly adjusted wheel end, or damage to the hub.
Scoring, Pitting or Corrosion
Roughness, grooves, pitting, heat discolouration, or corrosion on a bearing surface can prevent the bearing from fitting and operating correctly.
Repeated Wheel-Seal Failure
A seal that repeatedly leaks at the same wheel end may indicate a worn, damaged, or out-of-round seal surface.
Bent or Cracked Spindle
Impact damage, bearing failure, overheating, or wheel separation can bend or crack a spindle. The complete axle and wheel end must be inspected before determining whether spindle replacement is appropriate.
Brake & Suspension Components
Trailer Brake and Suspension Components
Northwest can inspect, source, and install selected axle-end, brake, and suspension components during spindle and axle repair.
Trailer Brake Spider Plates
The spider plate provides the structural mounting point for the trailer brake shoes, S-cam components, bushings, and anchor pins. Replacement plates are available in two brake configurations: 4707 and 4710. Correct fitment must be confirmed by inspecting the existing brake setup, S-cam configuration and axle-tube measurements.
Cracks in the plate or housing
Elongated anchor-pin holes
Excessive S-cam bushing-bore wear
Loose anchor pins
Brake-shoe misalignment
Corrosion or structural deterioration
Common axle-tube outside diameters include 5 inches and 5¾ inches. Axle-tube OD is a separate measurement and does not identify the brake configuration by itself — a 5-inch or 5¾-inch axle tube does not determine whether the brakes use a 4707 or 4710 configuration.
Mounting point for trailer brake shoes, S-cam components, bushings and anchor pins
Brake-spider configuration
4707 brake configuration or 4710 brake configuration, identified from the existing brake setup and S-cam configuration
Supporting fitment measurement
Axle-tube outside diameter, commonly 5 inches or 5¾ inches. This measurement is separate from the brake configuration and does not identify it.
Fitment warning
Cracks, elongated anchor-pin holes, worn S-cam bushing bores, loose anchor pins, brake-shoe misalignment or corrosion must be assessed before replacement.
Physical measurements and axle identification are required to confirm this specification.
Component manufactured or supplied by Axle Spindle Inc. Fitment verification and installation provided by Northwest Axle Spindle.
Hendrickson Suspension Hanger Bushing Rings
Replacement hanger bushing rings are available in narrow and wide configurations for compatible Hendrickson RS, HT, HLA and select HTR and Hybrid suspension systems. The ring works with the suspension bushing to absorb road shock, reduce vibration and help maintain suspension and axle alignment.
Maintaining suspension alignment and controlling movement around the hanger pivot
Compatible axle models
Hendrickson RS, HT, HLA and select HTR and Hybrid suspension systems, in narrow and wide configurations
Physical measurements and axle identification are required to confirm this specification.
Component manufactured or supplied by Axle Spindle Inc. Fitment verification and installation provided by Northwest Axle Spindle.
Holland Suspension Hanger Bushing Rings
Application-specific bushing-ring options are available for compatible Holland systems and applicable SAF INTRA and SAF MODUL suspension systems. The ring allows controlled movement within the hanger, helping maintain axle alignment and balanced load distribution.
334-1962
SRK530 and SRK-530
HLD 48100394 / HOH48100394 / HOL48100394
PB57-25394 and PB57-25394ATR
SAF48100394
TRB9347 Pivot Bushing
90008247
Part numbers are provided as fitment references only. The existing suspension model, component numbers and measurements must be inspected before compatibility is confirmed.
Restoring alignment and controlling movement at the suspension mounting point
Compatible axle models
Compatible Holland systems and applicable SAF INTRA and SAF MODUL suspension systems
Physical measurements and axle identification are required to confirm this specification.
Component manufactured or supplied by Axle Spindle Inc. Fitment verification and installation provided by Northwest Axle Spindle.
Fitment Information
Why Accurate Measurements and Fitment Matter
A commercial axle operates under substantial weight, heat, braking force, and vibration. A spindle, sleeve, bearing, seal, or spider plate that does not match the axle can cause poor bearing fit, seal leaks, wheel-end movement, brake misalignment, accelerated wear, and possible component failure.
Never select a replacement spindle using the truck or trailer model alone.
Fitment checklist
Vehicle or trailer year, make, and model
Axle manufacturer
Axle model and identification tag
Axle weight capacity
Spindle style: parallel or tapered
Inner and outer bearing numbers
Seal number and seal-surface measurements
Locknut configuration
Axle-tube outside diameter
Axle-tube inside diameter
Axle-tube wall thickness
Left- or right-side application
Clear photographs of the damage
Not Sure Which Spindle Fits Your Axle?
Send Northwest Axle Spindle the axle information, component numbers, measurements, and clear photographs. A technician can review the available information and help identify the correct next step. Final fitment is confirmed through inspection and measurement.
Northwest Axle Spindle provides truck spindle replacement, trailer spindle replacement, full axle replacement, trailer spider plate replacement, repair-shop service, and mobile service. Complete axles are not manufactured in-house; when a required axle is unavailable as a standard replacement, manufacture to confirmed measurements can be coordinated through a trusted vendor.
Northwest Axle Spindle is an independent inspection, repair, and installation service. Product names, vehicle names, axle names, and trademarks belong to their respective owners. Components shown on this page may be manufactured or supplied by Axle Spindle Inc. and other approved suppliers. Product availability and compatibility must be confirmed for each application.
