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04-28-2021, 08:08 AM | #1 |
Junior Member
Join Date: Apr 2021
Posts: 5
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39 big truck driveshaft removal
Ok guys. I am finally to the point where I need expert advice and or diagrams. I am doing a frame off resto on a 39 big truck. I have the body off, engine and trans pulled as a unit, and frame completely stripped. I am having trouble understanding how the hell I get the driveshaft out in order to replace the middle ujoint. I have a feeling the entire third member has to be pulled back and out of the truck. That's fine if that's what needs to be done, I am just not believing ford would have set it up this way. It would make a huge job out of replacing that center joint. Which is trashed right now. Leading me to believe that's the reason it wasn't changed. I ordered a few books from gaslight but the guy said it doesn't really cover the big truck and that I may be "opening a can of worms". Along with my other questions where do I find resources for the big truck drivetrain/suspension? Another thing is how does the rear leaf shackle remove from the frame mount? It looks like a set bolt needs to be removed allowing a giant regular screwdriver tip to uncork the shackle pin? Please help me here guys nobody in my tiny little town knows about this truck. I would really like to keep the rear axle original but if I am indeed opening up cans of worms I may just swap it for the 1996 f super duty rear end instead. Another thing how do I remove the front leaf pack? Thanks for any input. My project has been standstill for days and Im waiting on books from gaslight that may not even help me.
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04-28-2021, 10:20 AM | #2 |
Senior Member
Join Date: May 2010
Location: So Cal
Posts: 8,711
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Re: 39 big truck driveshaft removal
You should just need to remove the coupling shaft to get the U-joint out.
Do you have the parts book or Service Bulletins, they show how things are assembled. |
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04-28-2021, 11:35 AM | #3 |
Senior Member
Join Date: Oct 2016
Location: harpursville ny
Posts: 1,038
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Re: 39 big truck driveshaft removal
See if you can find a reprint of the 1939-48 Ford and Mercury shop manual which I believe was originally printed in Canada. Has lots of info for the big trucks.
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04-28-2021, 06:01 PM | #4 |
Junior Member
Join Date: Apr 2021
Posts: 5
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Re: 39 big truck driveshaft removal
I just got a book in this afternoon. I can't remember what the title is. I'm going to look it over but I need to remove the suspension anyway so I looking for pointers there.
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04-28-2021, 11:17 PM | #5 |
Senior Member
Join Date: Jan 2014
Location: Orcas Island Washington
Posts: 4,843
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Re: 39 big truck driveshaft removal
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Owner/Operator of 'Jailbar Ranch' on the side of Mt. Pickett. Current stable consists of 1946 1/2 ton pickup turned woodie wagon with FH V8, 1947 Tonner Pickup (red) mostly stock with exception of a cummins 6at turbo diesel, 1946 Tonner Pickup (green) with 226 cu in 6 cyl flathead, 1979 Toyota landcruiser wagon, completely encased in 1947 Ford Jailbar sheet metal. Ok, cornbinder rear fenders..... 'Rusty ol' floorboards, hot on their feet' (Alan Jackson) |
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