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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Transmission fluid

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Old Aug 23, 2009 | 11:30 AM
  #1  
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twister2gt
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Transmission fluid

I got a 89 f250 with a c6 transmission. about every 2 months im about a quart and a half low on transmission fluild i did a fluid change when i got the truck so i have new filter and gasket. I dont see any leaks. I'm not leaving puddles anywhere. Is this just what big trucks do. ive never had a auto before so just wondering. This is my everyday driver. and i do mostly stop and go driving. truck has about 150,000 on it
 
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Old Aug 23, 2009 | 12:24 PM
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danr1
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Smoking just a tad? Sucking trans fluid up the shift modulator line? Might have a small crack in the diaphragm, not quite enough to keep it from shifting but leaks fluid by it. I'd just replace it, not expensive anyway.
 
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Old Aug 23, 2009 | 09:31 PM
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twister2gt
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it doesnt smoke but if it did just a bit i couldn't tell. tinted window and no tailpipes. Does anybody know a good shift modulator? I looked at advance auto's web site and they have one with a green strip and a purple strip. Any differnce? I also got under there and looked i saw a alot of black build up right after the tailshaft on the body so i think i need a seal back there to. Going to replace both.
 
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