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Old 03-03-2021, 10:47 PM   #1
35fordtn
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Default Tech tip 覧 1940-48 transmission shifter arm repair

The last few weeks we致e had a few rebuilds on 40/48 shifter housings. The shifter arm pins are nearly always worn. Rather than replacing with diminishing NOS arms, we致e been repairing them for years, and thought I壇 share as it痴 simple. The below two photos show the common wear.







First grind the head of the original smooth and drive out with a punch. (Wear safety glasses)




Next drill the hole with a 19/64 drill bit.





Next drive in the new pin. And you are done!




We sell the replacement pins (see link below). I have gotten to where I replace them all as even compared to a NOS arm these pins fit the Clevis better for less shifter lever free play.. hope this helps someone save some $$ on a un-needed nos parts purchase.

https://thirdgenauto.com/product/194...m-repair-pins/


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Old 03-04-2021, 03:45 AM   #2
V8COOPMAN
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Default Re: Tech tip 覧 1940-48 transmission shifter arm repair

.

OK, lets hear it, folks! THIRD GEN! THIRD GEN! THIRD GEN! THIRD GEN! THIRD GEN! THIRD GEN! DD




Third Gen Automotive
Phone: 844-327-5988
Url: thirdgenauto.com
2600 Old Nashville Hwy
McMinnville, TN 37110

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Old 03-04-2021, 06:35 AM   #3
Tim Ayers
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Default Re: Tech tip 覧 1940-48 transmission shifter arm repair

Great tip and advice!
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Old 03-04-2021, 08:31 AM   #4
corvette8n
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Default Re: Tech tip 覧 1940-48 transmission shifter arm repair

Cool, glad to know this option exists, Thanks.

Last edited by corvette8n; 03-04-2021 at 10:52 AM.
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Old 03-04-2021, 09:06 AM   #5
oldford2
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Default Re: Tech tip 覧 1940-48 transmission shifter arm repair

What am I missing here? If you drive out the old shaft isn't the hole the correct size? Why do you have to drill it out?
Just curious
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Old 03-04-2021, 09:15 AM   #6
35fordtn
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Default Re: Tech tip 覧 1940-48 transmission shifter arm repair

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The original pins are stepped down to act as a stop when installed at the factory... as in the originals are smaller in the portion that sits in the arm
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Old 03-04-2021, 09:23 AM   #7
19Fordy
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Default Re: Tech tip 覧 1940-48 transmission shifter arm repair

An additional idea (to the above tip) is to replace the stock pins that attach shifter arms to transmission side cover with fine threaded nuts and bolts after you replace the seals.
Can be done with the transmission in the car. Clutch arm also. Still working great 20 years later. Zero play as all components are threaded. No pin peening required.
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Last edited by 19Fordy; 03-04-2021 at 10:01 AM.
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Old 03-04-2021, 10:02 AM   #8
Mart
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Default Re: Tech tip 覧 1940-48 transmission shifter arm repair

Nice job, Michael. I wondered about the drilling, now you've explained it, it all makes sense.
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