Parts Change Service Bulletins

The downloads (100-200K JPEGs) on this page are Willys Motors Service Bulletins, sent to Willys dealers in the early 1960s, relating to parts changes in the CJ-3B drivetrain.

New Ignition and Starter Switch and Lock Cylinder

Bulletin No.497; November 15, 1960

• Page 1 -- new-style lock and bezel on all models, starting with CJ-3B SN 57348 67441.

Change in 9-1/4" Clutch Option as Used on Four Cylinder Engines

Bulletin No. 509; March 17, 1961

• Page 1 -- New pressure plate for optional 9-1/4" clutch starting with engine no. 4J 284064.

Front Wheel Hubs

Bulletin No. 588; September 25, 1962

• Page 1 -- New front wheels hubs and bearings on all models. Effective on the CJ-3B with SN 57348 89008.
• Page 2 -- Comparison of old and new oil seals.

Transmission Assembly Change

Bulletin No. 600; November 30, 1962

• Page 1 -- Low gear ratio 3.339:1 replacing 2.798:1 on CJ models, starting with CJ-3B SN 57348-93447.

Axle Ratio

Bulletin No. 601; November 30, 1962

• Page 1 -- 4.27:1 axle ratio replacing 5.38:1 (now optional) on CJ models, starting with CJ-3B SN 57348 93447.

I'm grateful to the late Bruce Agan for sharing these Bulletins. -- Derek Redmond

See the 1963 incorrect oil level dipstick recall in Oil Level Indicators.

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