Thread: Transmission Pilot Bearing Availability?
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Old April 19th, 2023, 09:23 PM
Prowbar Prowbar is offline
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Location: Friesland, the Netherlands
Truck: 1965 GMC 1500, 478 V6, SM420
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Default Re: Transmission Pilot Bearing Availability?
Hello Jim,

Are you sure the OD is 1.355" and not 1.378"? To my knowledge, all bearings used in these trucks are of a metric size.

1.378" is 35mm
.985" is 25mm
.755" is about 19mm

I can find bronze bushings with a 35mm OD and 25mm ID. These can be easily machined to the right length.

For my 478 flywheel, it had a rather larger pilot bearing for a large truck trans. Since I went with the SM420 I made a pilot bearing conversion sleeve to accept a standard 6202 bearing, used on the 305 flywheel. That sleeve was pressed into the flywheel.

You're using the big truck trans in your pickup project?
Last edited by Prowbar; April 20th, 2023 at 05:21 AM.
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