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Order Ford 6000 Parts Online

Re: 6000 SOS input

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Author  [Modern View]

10-21-2019 14:12:51

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A coarse spline is in fact stronger - I recall reading a service bulletin on the subject when Ford went to a coarse spline on the later SOS transmissions. They did the same on the input shaft of the later 8-speed crashboxes.

That said, lubrication makes a big difference. Notice how the splines are the same size on the other end of the shaft, and you never see any wear there. I always use a heavy duty spline lube on the torque limiting clutch splines and mating input shaft when putting a SOS trans back together.

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10-21-2019 16:43:34

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 Re: 6000 SOS input in reply to Bern, 10-21-2019 14:12:51  
Did the later SOS input shafts have a larger diameter too? Looking at the three I have apart now, they sure look smaller than I'd like to see when compared to other tractor input shaft sizes.

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10-21-2019 19:13:36

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 Re: 6000 SOS input in reply to Dieseltech, 10-21-2019 16:43:34  
They didn't change the diameter, only the spline count and angle. I remember reading a service bulletin about it. I thought maybe Fordfarmer could look it up for us with the stack of bulletins he just bought, but according to the parts book it's a 1968 bulletin.

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