'35 Model 51 Transmission Removal

KDL

KDL

Senior Member
After 90 years of service, the transmission gave up today and will need to be removed for repair. Is it possible, or practical, to remove it to the rear leaving the engine in place, or should I just pull the engine and go out the front? I've never worked with a closed driveshaft before.
Thanks in advance.
 
Excellent question - the answer depends on your experience, skill level, and how well-equipped you are. I think it's less work to pull the rear axle especially if you have a lift.
 
Thanks everyone so far.
Bob C is correct; it's the big truck in my avatar. The cross member is bolted in and should come out. I'd have to look to see what it would take to move the rear axle back. The engine was out a few years ago so pulling it doesn't concern me other than the work involved. I was just checking to see if there were any alternative ways of getting it out.
Keep the ideas coming. Thank you.
 
You should be able to remove the coupling shaft without removing the rear axle. Pull the coupling shaft front cover back and unbolt the back part of the u-joint and you should be able to drop the coupling shaft.
 

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Thank you for the additional information. Would the coupling shaft shown be the same in a "35?
The truck is three hours away, so this is going to be a little drawn out. I'm sure I'll have more questions. As always, many Thanks.
 
I have a 1932 coupling shaft on the bench right now and it looks just like the one in the picture so I'd say the 1935 should be the same.
 
KDL - Do you have a copy of my book? It includes all the pictures and information you need to remove the transmission.
The coupling shaft can be disconnected from the rear of the transmission because the universal joint can be parted. It has screws which hold the flanges together. Just slide back the front part of the coupling shaft cover (made of sheet metal) and it will expose the differential. It should have the bolt heads wired together. Once the coupling shaft drops out then support the engine weight. You can then unbolt the cross-member holding the end of the engine-transmission assembly. Then the transmission can be dropped out. There are lots of details of parts and pieces that need to be unhooked or gotten out of the way, but that's the general idea. Ford designed the truck this way just for this purpose. You can also inspect your clutch and flywheel and make and repairs or replacements while you have the transmission out.
Feel free to PM me if you want more information.
 
Bob, Thank you for the clarification.
David, Yes, I do have your book! I’ll be studying it the first chance I get. I tried attaching a video of the transmission but it won’t accept the file.
More questions to follow I’m sure.
Picture is from the 4th of July when she was still moving on her own.





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KDL said:
Bob, Thank you for the clarification.
David, Yes, I do have your book! I’ll be studying it the first chance I get. I tried attaching a video of the transmission but it won’t accept the file.
More questions to follow I’m sure.
Picture is from the 4th of July when she was still moving on her own./QUOTE]
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The transmission came out over the weekend. No surprises on the removal. We were able to cradle the engine with a ratchet strap around the frame rails so we could still move the truck around. Other than the transmission problems, we did find the rear u-joint of the Coupling shaft had been running dry. That will have to be looked at.
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Will Vanpelt be my best source for transmission parts? Any others suppliers?
 
I haven't pulled it apart yet, but I'll probably need bearings, gaskets and a main shaft for starters.
 
KDL said:
The transmission came out over the weekend. No surprises on the removal. We were able to cradle the engine with a ratchet strap around the frame rails so we could still move the truck around. Other than the transmission problems, we did find the rear u-joint of the Coupling shaft had been running dry. That will have to be looked at.

Will Vanpelt be my best source for transmission parts? Any others suppliers?
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