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Ford Truck Club Forum > FORD F-100 | F-150 SERIES > 1948-1983 Ford F100



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Old November 20th, 2018, 07:06 PM
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JedCrone JedCrone is offline
 

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Default Foaming ATF help!

I have a 74 F100 with a three speed auto trans in it (I think C4). It drives but it shifts into second late (about 20-25 mph). Second to third is fine. I checked my fluid level and the dipstick was covered in foamy bubbles about an inch past the "full" mark. Ive found that some people say its too full, or maybe a vacuum leak in the trans. I just drained a tiny bit of fluid and it was super frothy. I'm not sure what all of that means. Does anyone have any advice? Thanks
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Old November 20th, 2018, 11:20 PM
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I would look for a cooler leak. Coolant may be getting into the fluid. Check the radiator for evidence of oil.

2003 F-150 XL RCSB 2wd 4.2 5 speed 3.55 LS
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Old November 20th, 2018, 11:32 PM
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In my research I saw that that might be an problem however the oil cooler is completely seperate from the radiator.


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atf , automatic , foaming , transmission

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