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Old Jul 30, 2020 | 08:39 PM
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Adding Transmission Fluid

1973 F100, 390 C6 transmissions.
The transmission leaked often, so I changed the pan and filter; and about 2 qts came out. I added 3 qts, the dipstick still doesn't even register yet.
Before, I start adding additional transmission fluid. Is there a proper way to add it?
I assume, let the transmission warm-up, add one qtr, and shift through the gears, repeat?
Is the Capacity 7 qtrs ?

Thank you,
 
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Old Jul 30, 2020 | 08:48 PM
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When I did mine I also drained the torque converter and the total to fill it all back up was 14 quarts I believe. Does the truck go into gear at your current level?
 
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Old Jul 30, 2020 | 10:13 PM
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I can't think of any other case where I'd suggest a snake oil, of magic fix whatever you want to call it but there is one that's impressed me many times. try a bottle of Lucus Transmission tune up. it helps the transmission out and it really does seal up most leaks . not all but most.
 
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Old Jul 31, 2020 | 05:07 AM
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Hey @caravaggio2000 it doesn't go into gear, and that was a concern as well.
 
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Old Jul 31, 2020 | 09:18 AM
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Well it probably doesn't go into gear because it is so low. If mine is more than a quart low, it won't go into gear at all. Keep adding it until you see it on the mark and then it should go into gear.

You are using type F fluid right?
 
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Old Jul 31, 2020 | 09:42 AM
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Yea, I'm using F-Type. Thanks, I'll do that.
 
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Old Aug 1, 2020 | 06:07 AM
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Originally Posted by SemperFi_YEMX
1973 F100, 390 C6 transmissions.

The transmission leaked often, so I changed the pan and filter; and about 2 qts came out. I added 3 qts, the dipstick still doesn't even register yet.

Before, I start adding additional transmission fluid. Is there a proper way to add it?

I assume, let the transmission warm-up, add one qtr, and shift through the gears, repeat?
Is the Capacity 7 quarts?
C6 = 13 quarts with a filter change, this includes the torque converter.
 
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