Pickup gears in early gearbox?

3

33rds

Member
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)?
 
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
 
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
 
I've often wondered how to use the early shift tower in restoration app. Thanks 35 for the tip. Fred A
 
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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You can also fit the gears from a mainline into the early box,you need a bit of machining but they fit.
Lawrie
 
Fred A said:
I've often wondered how to use the early shift tower in restoration app. Thanks 35 for the tip. Fred A
Click to expand...

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
 
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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