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Pilot bushing installed in 1975 300 engine question
Hey guys,
I've got a 1959 F100 that I'm working on that had a major clutch assembly problem.
It has a 1975 300 inline six and is using the 1959 3 speed side loader transmission with the 1-3/8" 10 spline input shaft.
When I pulled everything down and finally pulled the pilot bushing, there was a steel bushing adapter in the crank with the bronze bushing installed in the adapter.
Has anyone come across this assembly before and any info on a bushing source? Is it something common?
The dimensions on the bronze bushing are 1.30 OD x .665 ID (input shaft pilot diameter) x 1.14 long
I'll start checking my parts house bushing inventory tomorrow.
Thanks,
Dan
It looks like a homemade piece to me. It also looks like it stuck out too far from the end of the crank to give the input good support. I would check the length of the input shaft vs the length of commonly available manual transmissions for the 300 to see if it is too short.
If it were me I'd look for a nice small block wide ratio 4-speed toploader while you have it apart and upgrade.
Or make a new Oilite bushing and crank adapter sleeve.
[edit: Some four speeds of that era - 390 FE I think - had a shorter input shaft. Don't use one of those to measure / use.]
This one isn't mine, I just ended up working on it because no one else would touch it. (Wonder why)
It's got a home made adapter plate that mounts between the 1975 bellhousing and the transmission, mounting the assembly on the 1959 fixed crossmember. Dimpled for weight savings!
I had remounted the bellhousing and transmission without the flywheel and clutch assembly to see how things lined up, and to see if it even made contact with the above bushing. I stuck my snake camera in a hole on top of the bellhousing, and the pilot was fully inserted in the bushing.
Since there was a full tenth of an inch difference between the pilot shaft and the worn bearing, we thought that might be causing part of the problem, along with a burnt and cracked pressure plate and clutch.
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