Ken Cates' Hudson Stepdown Restoration Resources

Hudson Parts Interchange

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The Hudson Parts Interchange Manual allowed mechanics and service personnel to identify parts interchanges between model years. In the age of Stepdown maintenance, the identification and selection of parts were strict. BY THE BOOK. Assuring maximum stock usage was a process that included sharp memories and carefully crafted inventory systems. Hudson Factory Interchange manuals allowed the Hudson Dealer and Service Center to add the ability to ID and use parts that were on hand but marked for other years and applications.

The following listings are by no means fully accurate. The information is a compilation of information gleaned from personal experience and the sharing from others who have scoured OEM and after-market parts manuals to ID and catalog interchangeable parts that MAY BE appropriate to use in repairing your Hudson.

Always compare, compare, compare: the OEM part you take off your HUDSON should be viewed as the ultimate decision tool. Use the OEM part as your reference when deciding to use a replacement part. All Hudson parts are hard to find. your CORE may be the reason another Hudson can be restored. Make sure you rebuild what can be rebuilt and give or sell your cores to those who can rebuild them for reuse.

NOTE: The tables associated with the following illustration may have links to INTERNET locations where additional information or opportunities to procure the listed part (s). The vendors listed were added at the time of the creation of this page because they were offering replacement parts matching the Hudson part. Providing this information is in no way an attempt to create a comprehensive listing nor an endorsement of a vendor or a recommendation to purchase from a vendor.

Front Suspension

1948 - 1954 Hudson Suspension components are identical year to year. In 1954 Hudson added Power Steering as an option that could be added to all models produced. The illustration shows Front Suspension 1948-1954 except Jet. Identifies the individual components found in the front suspension. These components are the same from left to right except as noted.

NOTE

2nd type front suspension complete has the 2nd type steering spindle (Group No. A3) and is used with the 2nd type front wheel hub assembly (Group No. E3) and front wheel bearings (Group No. E4). 1st and 2nd type parts are not interchangeable. 2nd type of parts became effective on LHD cars with 480 Series serial No. 48920, 2nd type of parts was also used on serial No. 48225 through 28479, 48487 through 48500, and 48665 through 48705.

The following interchange information utilizes the same marking conventions used in the Hudson Parts Manual illustration.

1948 -1954 Front Hudson Suspension
ID
Name
Vendor
Vendor P/N
Aftermarket Source Complete overhaul kit Kanter Auto Parts Select: Kit or component
Alternate Make Source
Complete overhaul kit
41-56 Buick, 50-56 Cadillac, 50-54 Chevy, 
53-62 Corvette,49-53 Ford,
46-55 Kaiser, 49-53 Mercury, 41-56 Oldsmobile, 41-57 Pontiac, 49-56 Willys
compare OEM Hudson parts

A1-9 , A4-4, A4-1, A1-4, A4-2, A4-3, A1-3, A1-10

King Pin Kit

Moog #8314-B (obsolete)
Kanter Auto Parts select kit
Car Parts Discount

A1-17, A1-17A, A1-18, A1-5, A1-16, A1-19 Lower Outer A-Frame Bushing Kit Car Parts Discount
Rare Parts
A1-30, A1-31, A1-16, A1-27, A1-29, A1-32 Upper Outer A-Frame Bushing Kit Car Parts Discount
Rare Parts
A1-14, A1-13 Lower Inner A-Frame Bushing Kit Car Parts Discount
Rare Parts
A1-24, A1-26, A1-28, A1-21 pivot assy-upper support Car Parts Discount
Rare Parts
Front Spindle Bearings and grease seal

Front inner wheel grease seal:      SKF 15649

Front inner wheel bearing:           Timken 15123

Front inner wheel race:                Timken 15245

Front outer wheel bearing:           Timken 9067

Front outer wheel race:                Timken 9195

These part numbers were provided by Hudson Open Forum Member cchancel. Purchased all from NAPA parts store during August 2021 to use on a Stepdown Hudson.  Stepdown bearings interchange all models from 1948 to 1954 according to the Hudson Master parts manual notes.
F11-6 Shock mounting plate Wildrick Restorations Contact Doug WIldrick for price and availability
F11-1
Front Shock
Other automobiles with shock use matches
match compressed and full extended lengths
1949-56 Ford full-size ex SW, 53-62 Corvette, 61-73 Volvo, 74-78 full-size Chrysler, 76-79 Volare, Dodge Aspen, 71> Gremlin, Javelin, AMX
Gabriel 26001, 4215B, 4502B, 80906
Weatherby (1979 catalog) 48481 / 48504
Monroe, Heavy Duty, 1.75" vs stock 1" diameter 3008
Monroe 1001, 1032, 1007 ,K-11188, K-188, 31094
Delco P-1016, S208,
Sears 79203, 93403
Hercules D-141, D-720, D-220, D-252, M-50, M-51, N-530
Kanter Auto Parts select the desired shock
Car Parts Discount select the desired shock
F1-1 Coil Springs Eaton Springs Get Catalog Here

Stepdown Hudson Steering

Hudson Center Point Steering

1948- 1954 Hudson steering was controlled from a fulcrum point located below the front center frame cross member. The steering is known as CENTER POINT STEERING. The fulcrum point for the steering is a center pin supported by a set of needle bearings. Known as a weak point in Hudson that has been driven many miles the steering becomes sloppy and the car will jump or wander from side to side causing the driver to see-saw the steering wheel to compensate for the uncommanded steering activity. Repair of this steering component is covered in the Hudson Mechanical Procedures manual. If the pin is in good shape the repair could be as simple as replacing the bearings.

ID
Name
Vendor
Vendor PN
Center Pin and tapered holding pin
Bearings
Caterpillar

  • Catepillar part # 442926/
  • possibly 4F2926
After Mkt Source
Bushing
Gert Kristiansen,1731 South 500 East., Salt Lake City, UT 84105 (801) 486-1635

Bearing replacement kit machined from a proprietary material

Hudson Stepdown Tie rod ends
ID
Name
Vendor
Vendor P/N
A6-10
Tie Rod End
46-47 Ford Interchange with Hudson
Moog - Needs to be modified to work on a Hudson Stepdown. Saw off 3/4 inch from right tie rod end and extended the tread and slot deeper into the link. Use an 11/16 X 18 Tap (Source Dec 1974 WTN Pg15) ES147R & ES147L
Moog ES-416R & ES416L
Moog ES-64R & ES-104L
Kanter Auto Parts Select the required part from the Catalog
Rare Parts Select the required part from the Catalog

Raybestos - available from O'Reily's AutoParts (2013)

401-1096(left)/ES416L  

401-1097(right)ES416R

Rear Axle 

Hudson and Dana Rear Axle

51 pinion seal Parts NAPA 47897 or National 47331

ID Name Vendor Vendor P/N
 Dana 44 Inner Seal  40769S
 Dana 44 Outer Seal Timken, SKF, Napa 17310

Brakes and Control

Will be updated as above as time permits

Wheels

Will be updated as above as time permits

Springs and Shocks

Will be updated as above as time permits

Engine

Will be updated as above as time permits

Brakes and Control

Will be updated as above as time permits

Clutch

Will be updated as above as time permits

Transmissions and Control

Will be updated as above as time permits

Frame

Will be updated as above as time permits

Propeller Shaft

Will be updated as above as time permits

Fuel System

Will be updated as above as time permits

Exhaust System

Will be updated as above as time permits

Radiator

Will be updated as above as time permits

Electrical

Will be updated as above as time permits

Special Tools

Will be updated as above as time permits

Body and Trim

Will be updated as above as time permits

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This page was updated on February 2023

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