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Order Ford 4000 Parts Online

Re: Just purchased 1962 4000 with SOS problems

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Author  [Modern View]

02-16-2014 16:01:26

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This may be way out in right field but I recall that some of the SOS transmissions had a check valve up high in the rear flange of the trans housing. It's purpose was to prevent overfilling the SOS by dumping excess fluid into the hydraulic compartment. It may have been used only on the early ORC trannys and your 4000 should have the DDC tranny. Somebody who is more familiar with the SOS (Larry NCKS or Tony Jacobs) will clarify this.

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Larry NCKS

02-16-2014 16:57:20

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 Re: Just purchased 1962 4000 with SOS problems in reply to Texas!, 02-16-2014 16:01:26  
Texas, my experience with complete teardowns on this transmission has been on the DDC type. I'm sorry, but I don't recall anything about a check valve that should dump oil if the transmission gets too full. Perhaps someone else may.

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02-17-2014 06:44:20

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 Re: Just purchased 1962 4000 with SOS problems in reply to Larry NCKS, 02-16-2014 16:57:20  
In the Ford Service Manual, Chapter II, Section 9, Figure 85. "Transmission Breather (Early Models)". I recall that Carl Davis mentioned it in his SOS teardown at the FFCA convention. Of course a 4000 with DDC isn't an early model.

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