| Pair of 40's | -- 04-01-2011 @ 6:59 AM |
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What weight and type is recommended for my 40 ford 3 speed transmission. Car is driven only in warm weather. Thanks
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| supereal | -- 04-01-2011 @ 10:30 AM |
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Any brand name 80W-90 gear oil is acceptable, but we prefer the straight 140 weight. It stays in the transmission better than the lighter oil. While there is a rear seal, and a slinger, the Ford gearboxes usually leak considerably, either or both on your driveway, and down the torque tube. 140 is a bit heavy for colder climates, but for most of us, it has the added advantage of making shifting somewhat smoother by slowing the cluster gear down a bit between shifts.
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