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Old 08-29-2020, 04:30 AM   #1
33rds
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Default Pickup gears in early gearbox?

Is there any way / trick to mount a gear set from 40’s pickup (29-15 gears) in a 1932 -34 gearbox (18 Case and 40 shift tower)?
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Old 08-29-2020, 08:46 AM   #2
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Default Re: Pickup gears in early gearbox?

In some 18- cases I’ve been unable to fit a 29 tooth cluster, and in some I have. It’s though getting the main drive gear in. If it’s the 022a or the 21c gear set you will need to use a later shift tower. If it’s the 67-7113 a 67-7017 gear set then you can use your original shift tower as that gear set used the early synchronizer.

If you have a 4.11 rear end id stay away from the 29 tooth set
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Old 08-29-2020, 08:51 AM   #3
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Default Re: Pickup gears in early gearbox?

Those early cases are not deep enough to install the larger diameter 29 tooth cluster in the usual way. The trick is to install the main drive gear without the bearing. The bearing is installed later. Indeed it is a trick and men that do this install are quite proud of their coordination with the main shaft assembly as part of the trick. Others will add details. Good Luck: Fred A
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Old 08-29-2020, 08:56 AM   #4
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Default Re: Pickup gears in early gearbox?

I've often wondered how to use the early shift tower in restoration app. Thanks 35 for the tip. Fred A
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Old 08-29-2020, 10:56 AM   #5
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Default Re: Pickup gears in early gearbox?

I think certain later transmissions were made with one or two of the small teeth removed to prevent interference. Cannot find a reference on this.

Edit: Here's a pic.

maindrivemod.jpg
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Last edited by Hoop; 08-29-2020 at 05:22 PM.
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Old 08-29-2020, 04:58 PM   #6
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Default Re: Pickup gears in early gearbox?

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You can also fit the gears from a mainline into the early box,you need a bit of machining but they fit.
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Old 08-29-2020, 05:43 PM   #7
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Default Re: Pickup gears in early gearbox?

Quote:
Originally Posted by Hoop View Post
I think certain later transmissions were made with one or two of the small teeth removed to prevent interference. Cannot find a reference on this.

Edit: Here's a pic.

Attachment 440618
Hoop,
That’s how some of the Lincoln gears were
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Old 08-29-2020, 05:44 PM   #8
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Default Re: Pickup gears in early gearbox?

Quote:
Originally Posted by Fred A View Post
I've often wondered how to use the early shift tower in restoration app. Thanks 35 for the tip. Fred A
I’ve made forks to work off a fixture a friend built to be able to run a early top with later 39/up internals... it was more work than I anticipated
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Old 08-29-2020, 10:12 PM   #9
Lawrie
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Default Re: Pickup gears in early gearbox?

I too made a fixture for doing just that, they work fine,but a bit of work
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Old 08-29-2020, 10:55 PM   #10
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Default Re: Pickup gears in early gearbox?

i'd like to hear more about this fixture if possible
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Old 08-30-2020, 01:43 AM   #11
Lawrie
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Default Re: Pickup gears in early gearbox?

Shoot me a pm in a week or so,I,m away from home until then
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Old 08-30-2020, 02:07 AM   #12
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Default Re: Pickup gears in early gearbox?

Yes! do any of you have pitures of the fixture? It sounds intersting! I would like to run the 022a pickup gears! As i have 3:25 in the rear end
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Old 08-30-2020, 04:44 AM   #13
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Default Re: Pickup gears in early gearbox?

Yep, will be home in a couple of weeks,
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Old 08-30-2020, 10:39 AM   #14
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Default Re: Pickup gears in early gearbox?

Lawrie, are you using 40-48 forks to use to weld onto? That’s what I used.
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