The Ford Barn - 1940 clutch spline size

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kurt v

04-12-2026 01:39 PM

1940 clutch spline size

Is the spline 1 3/8" on the side shift trans or the i" ?

Mart	04-12-2026 03:59 PM

Re: 1940 clutch spline size

1-3/8" ten spline

Mac VP

04-16-2026 04:14 AM

Re: 1940 clutch spline size

The 1-3/8” diameter spline is correct for 1932-48 passenger car transmissions, with the exception of the 1937-39 cars with the V8-60 transmission……those had the smaller transmission which had the 1” diameter splines. The truck transmissions used the 1-3/8 splines well beyond 1948…..into the 1960’s anyway.

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