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Order Ford NAA Parts Online

NAA overdrive

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Jim in polk co

02-08-2020 19:37:40




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I am looking at a 1953 NAA. Would an overdrive for a 8N fit in the NAA with out to much trouble ???




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Kirk-NJ

02-09-2020 00:11:17




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 Re: NAA overdrive in reply to Jim in polk co, 02-08-2020 19:37:40  
Yes But if you're adding a sherman step up you might need to rework the handle because it comes out too close to the starter bump out in the NAA trans. The sherman combo from an 8n will fit without any problems.



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Sean in PA

02-08-2020 21:00:21




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 Re: NAA overdrive in reply to Jim in polk co, 02-08-2020 19:37:40  
Neither the 8N nor the NAA had an "overdrive". Do you mean a Sherman step-up auxiliary transmission? If so, then I think the answer is yes. The NAA and the 8N share the same part numbers for the transmission input shaft and related parts. Those part numbers didn't change on the 4 speed transmissions until the input shaft changed from 10 spline to 15 spline in 1958 with the '01 series.

But there may be other factors I am not aware of that might influence the answer, so anyone with more expertise please correct me if my answer is incorrect.

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jr841

02-09-2020 13:57:26




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 Re: NAA overdrive in reply to Sean in PA, 02-08-2020 21:00:21  
So is the Sherman transmission in an 8N or NNA the same as a 800 series except for the different imput shafts? I know early ones are 10 splines and 15 splines in 800 series.



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Kirk-NJ

02-09-2020 23:29:51




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 Re: NAA overdrive in reply to jr841, 02-09-2020 13:57:26  
No, Change was made in the early 01 series. It would be the same 10 spline input shaft for the 8n/NAA/800. Unless somebody changed out the flywheel/clutch and input shaft. Parts get switched around on these old tractors.



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