Gemmer steering box ID help
FTE Legend
Joined: Jun 2004
Posts: 32,061
Likes: 2,433
From: Upstate NY
A larger size unit was used on the bigger trucks. However, the last pic of the end plate with the adjustment screw and lock nut looks a little different than I expected. I have the larger Gemmer unit in my F100. Took a few modifications but worth the extra mechanical advantage you gain. I can't give any help with the casting numbers and doubt if you will ever unlock their mystery!
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New User
Joined: Oct 2008
Posts: 6
Likes: 0
From: Sonoma, CA
A larger size unit was used on the bigger trucks. However, the last pic of the end plate with the adjustment screw and lock nut looks a little different than I expected. I have the larger Gemmer unit in my F100. Took a few modifications but worth the extra mechanical advantage you gain. I can't give any help with the casting numbers and doubt if you will ever unlock their mystery!
FTE Legend
Joined: Jun 2004
Posts: 32,061
Likes: 2,433
From: Upstate NY
I left the casting alone and just drilled the holes I needed. It fit inside the frame. It was a little tricky to make sure it was installed at the same angle to fit up next to the bottom of the dash. You will also have to make a change with the clutch return spring if you are using one.
Senior User
Joined: Apr 2011
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I finally found it in this book. that gearbox is out of a late model 1963 F350 part number C3TZ 3504-W
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Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 787
From: Simi Valley, CA
1963/66 F350 model 84 Chassis & Cowl Open Drive-Away (no windshield, no cab).
Model 84 steering gear housing, steering shaft and worm are different than F100/350 model 81 conventional cab.
C3TZ-3524-N shaft & worm F100/350 81 conventional cab: 40 7/16" long / C3TZ-3524-R shaft & worm F350 model 84: 45 7/16" long.
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