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1961 - 1966 F-100 & Larger F-Series Trucks Discuss the Slick Sixties Ford Truck

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Old Jun 9, 2003 | 03:47 AM
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4ever4ord
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Hello all. I am new to this board and just bought a 61 F-100. It has a six cylinder and a four speed. I would like to change the oil in the tranny and rear end. Can anyone tell me what weight of oil to use? I was thinking of going with 90 wt. Thanks for your help.
 
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Old Jun 9, 2003 | 11:34 AM
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welcome welcome welcome I am a big fan of synthetics. I would use a 75w-90 in both. Unless your in an extreme climate.
 
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Old Jun 11, 2003 | 02:39 AM
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Thanks!
 
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