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Old 08-06-2017, 10:04 AM   #1
Dave1931Pickup
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Default Transmission Shift Fork Pins

Hi Everyone, What is a good method for backing up the head of the shifting fork pins for upsetting the hollow head. So far I have tried various chisels, screwdrivers and chunks of steel only to find that I need six hands and more patience. Also after they are upset it appears that they would still be loose. Is that right. I've heard a few people say to use roll pins, but I want to do it the way Henry did it.
Thanks for your help, Dave
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Old 08-06-2017, 11:12 AM   #2
Brian T
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Default Re: Transmission Shift Fork Pins

Hi Dave,
I have been there a few times with success, but find the roll pins a better option, do not remember the size.
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Old 08-06-2017, 11:40 AM   #3
1955cj5
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Default Re: Transmission Shift Fork Pins

I did it the first time with rivets, but they never would tighten up...always a little movement in the shift forks.

I made a bucking tool that held the heads and fit tightly in the case, but it seemed the available rivets did not have a deep enough recess in the end to allow them to tighten properly.

I used the roll pins the second time when I changed to a front mount brake handle.

Much better..


.
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Last edited by 1955cj5; 08-06-2017 at 11:55 AM.
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Old 08-06-2017, 12:04 PM   #4
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Default Re: Transmission Shift Fork Pins

I just finished this job last week. I took a pair of Crescent brand slip joint pliars and adjusted them so they clamped against the head of the rivet and the opposite side of the fork, with the handles almost closed. I then clamped the handles together with a pair of vice grips and used a hammer and large center punch to spread the end of the rivet. Worked like a charm.
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Old 08-06-2017, 01:02 PM   #5
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Default Re: Transmission Shift Fork Pins

Quote:
Originally Posted by sjhark View Post
I just finished this job last week. I took a pair of Crescent brand slip joint pliars and adjusted them so they clamped against the head of the rivet and the opposite side of the fork, with the handles almost closed. I then clamped the handles together with a pair of vice grips and used a hammer and large center punch to spread the end of the rivet. Worked like a charm.
Old combat adage: if it looks stupid, but it works, it's not stupid!
The factory must have had a tool like your pliar/vice-grip combo. Maybe more like a vice-grip with a forked jaw to clamp the rivets tight before setting...
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Old 08-06-2017, 01:49 PM   #6
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Default Re: Transmission Shift Fork Pins

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Place a punch in the hollow end and roll it around to make the hollow end larger..

Last edited by Dick M; 08-07-2017 at 09:52 AM.
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Old 08-06-2017, 02:08 PM   #7
2manycars
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Default Re: Transmission Shift Fork Pins

Hardened split pins (sometimes called roll pins) work the best. Easy to install and a tight fitting fork when done.
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Old 08-06-2017, 05:46 PM   #8
Dave1931Pickup
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Default Re: Transmission Shift Fork Pins

Quote:
Originally Posted by 1955cj5 View Post
I did it the first time with rivets, but they never would tighten up...always a little movement in the shift forks.

I made a bucking tool that held the heads and fit tightly in the case, but it seemed the available rivets did not have a deep enough recess in the end to allow them to tighten properly.

I used the roll pins the second time when I changed to a front mount brake handle.

Much better..


.
I agree about the available rivets not having deep enough recess to tighten up. I'm sure that the factory had a special tool like sjhark made.

Thanks everyone, I'm switching to 3/16" X 1-7/8" roll pins.
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Old 08-06-2017, 07:37 PM   #9
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Default Re: Transmission Shift Fork Pins

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Place a punch in the hollow end and roll is around to make the hollow end larger..
Yep, that's how I do them, and it works great.
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Old 08-06-2017, 10:50 PM   #10
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Default Re: Transmission Shift Fork Pins

I decided on roll pins. Not 100% comfortable with that, I ran safety wire through the roll pins and around the fork shaft. They weren't going anywhere.
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Old 08-07-2017, 04:20 AM   #11
31 RPU
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Default Re: Transmission Shift Fork Pins

Russ,
I did the same thing.
I took a dermal tool and made a groove on the opposite side of the split in the pin for the safety wire to lie in.
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Old 08-07-2017, 10:17 AM   #12
Russ/40
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Default Re: Transmission Shift Fork Pins

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Russ,
I did the same thing.
I took a dermal tool and made a groove on the opposite side of the split in the pin for the safety wire to lie in.
Even better yet! Great idea!
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Old 08-08-2017, 09:18 PM   #13
Dave1931Pickup
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Default Re: Transmission Shift Fork Pins

Quote:
Originally Posted by Dave1931Pickup View Post
I agree about the available rivets not having deep enough recess to tighten up. I'm sure that the factory had a special tool like sjhark made.

Thanks everyone, I'm switching to 3/16" X 1-7/8" roll pins.
I screwed up. The proper roll pin is 3/16" X 7/8" not 1-7/8".
Sorry for the bad info, Dave
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