What is the maximum torque those Ford transmissions can handle?
Bonus question: new 7-speed auto in a Ford Focus ST mk4 is based on one of those two with a 2nd gear removed. Does it keep the torque rating?
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According to Wikipedia, the 8F35 is 260 lb-ft. No clue on the 8F57.– Pᴀᴜʟsᴛᴇʀ2 ♦Jun 9 '20 at 0:55
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@Paulster2 that's 352Nm and Focus ST with 420Nm shouldn't have it. That probably implies that the gearbox in question should be based on a stronger 8F57, which in some applications handles 480-515Nm.– ClarkJun 10 '20 at 8:34
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Just removing a gear will not change the torque rating. It will change how the engine power is delivered to the road.
The rating is based on the strength of the case, the design of the teeth etc. If you exceed the torque limit then gears can be stripped or cases split or burst so when tuning engines that gearbox torque limit should be checked.
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The problem with that is speculation. People on the internet said 'removed a gear'. I personally don't know and haven't found if there are more changes, don't know the model, anything.– ClarkJun 10 '20 at 8:28
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Well I have seen and had to change gearboxes due to damage from too much power : torque went up by a factor of 3 and power by a factor of 2 so I was not speculating... Jun 10 '20 at 8:31
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No, I meant myself. In my question i said a simple '2nd gear removed', while it can actually be that half of the gearbox is different.– ClarkJun 10 '20 at 8:36