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Ford Truck Club Forum > FORD F-250 | F-350 SERIES | SUPER DUTY > 1948-1986 Ford F250 | F350

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Old June 22nd, 2014, 11:06 AM
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Ozzie Ozzie is offline

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Question C6 transmission advice needed

Hi Folks,

I’m a newbie. I’ve been reading the forum for a while, but this is the first post.
Last year I bought a 1976 F-250; 460 engine; C6 transmission; 60K miles, thought to be accurate. Amongst other things, I thought that I should do a transmission fluid change, as the original owner used it to pull a camper trailer, and the fluid probably has never been changed. The transmission works correctly and the fluid appears as a light tan color on the dipstick. The first question is: What is the correct fluid? The owner’s manual (March 1976), shop manual (September 1975), and dip stick all indicate type F. Someone said that Ford started changing fluid type on 1 May 1976. The truck had final assembly on or about 2 June 1976 in San Jose with delivery to the customer on 11 June 1976 in Woodland, CA. The ID tag on the transmission shows the following:

PJD L9 E14
D5TP BDA054261

My second question is regarding the advisability of adding an inline filter on the cooling line. I was considering using a spin-on type filter without the anti-drain back valve. Nominal micron ratings available are 10 with no bypass and 21 with a bypass opening of 8-11 PSI. Both have flow rates of 7-9 GPM (max.) and were intended as transmission filters.
Any comments or suggestions on this “project” would be appreciated. The forum is great, as we can pool our knowledge.
Old June 22nd, 2014, 10:00 PM
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skatebowd skatebowd is offline


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type F fluid! no experience or knowledge on filter question

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