1950 transmissions
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1950 transmissions
I am restoring a 1950 f-1. I have a few extra trucks, engines, and trannies laying around. I have two 4 speeds and two 3 speeds. I was planning on putting in one of the 3 speeds. On the one that I am going to use, the output shaft sticks out of the rear of the transmission about an inch and looks like it accepts a slip yoke. According to a manual I have all f-1s have a one piece drive shaft w/slip yoke. When I went to take the drive shaft off another truck w/3 speed I noticed it doesn't have a slip yoke. It has a yoke bolted to the output shaft of the tranny and a two piece shaft that slides in middle. Can anyone explain this?
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From: Kalispell, MT
I don't know exactly, but my 48 F1 has the HD 3 spd and the yoke is bolted to the output shaft of the tranny. The driveshaft contains a slip yoke behind the universal joint.
They needed to move somewhere to take up the driveline wind-up. I haven't seen a slip yoke on a trans output shaft on one of these, but anything is possible I suppose.
They needed to move somewhere to take up the driveline wind-up. I haven't seen a slip yoke on a trans output shaft on one of these, but anything is possible I suppose.
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your sounds like the my dad's original. The one i was going to steal the drive shaft from. From reading the manual there is a standard 3 speed and a heavy duty 3 speed. I wonder if the HD uses a boted yoke and the standard uses a slip yoke? Any experts out there who can answer this? I might end up using the HD. I would rather used the standard but I don't have a drive shaft or slip yoke for it.
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Sound likes I have a heavy duty 3 speed with all the parts I need and a 3 speed standard but no drive shaft to go with it. I was hopeing to use the stadarnd because it is clean, easier to get out of old truck, and shifts smooth. If I use heavy duty I might as well use one of my 4 speeds. They are already out of trucks and I think they use same drive shaft. The bad thing is i understand they are unsychronized.
Lead Driver
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From: Kalispell, MT
No, no, the HD 3 spd is synchronized in 2nd and 3rd. I've been running one daily for the past 4 years - they're primitive synchronizers, but they're in there. Same as the reg 3 spd.
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I know they 3 speeds are synchroed. What I was saying was I might as well use one of the 4 speed because they are already out of trucks sitting on pallet in barn. Both 3 speeds are still in donor trucks. I'm sure the drive shafts for both the HD 3 and the 4s are the same. That way I don't have to pull out one of the standard 3 speed and have to fine a slip yoke. I might just have to deal with the unsyched shifting. It's not like I will be driving it daily. just in parades an stuff.
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From: Connecticut
THe 3spd L/D uses the slip yoke, like an automatic, with a one piece shaft. The 3 spd heavy duty uses the flange setup, like the 4 speed. I pulled a 4 speed out one of my F-1 parts trucks and it had a one piece shaft, but used the flange. Both shafts are the same length, from center to center of the u-joints. It's the yoke or flange that makes up the difference in length. Both 3 speeds are decent trannys, the H/D will take more abuse, but these trucks are mostly retired now, so who's going to beat on thiers?
I may have an extra yoke for the L/D 3 speed here. I'll have to look.
Barry
50 F-1
I may have an extra yoke for the L/D 3 speed here. I'll have to look.
Barry
50 F-1
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Well it is either use a 4 speed or HD 3 speed. The 4 speed is already out of truck. HD is in a complete truck yet which still has seat in it and is out in pasture. All the hubs are locked up on it so it won't be easy to get it up to shop. Darn, I wish I had a drive shaft for LD 3spd. That one is in a truck but that truck is sitting just outside shop door and seat is already out of it.
Is it possible to take tranny and engine out as one in these trucks. Reason I ask is if I pull out one of trannys there is no rear engine support. That makes it hard to manuever the truck when needed. If I can pull engine and tranny all as one it would be a lot easier then trying to lift the tranny up through floor, into cab and then out the door. Then the engine would be out and truck would be nice and light to move around.
Is it possible to take tranny and engine out as one in these trucks. Reason I ask is if I pull out one of trannys there is no rear engine support. That makes it hard to manuever the truck when needed. If I can pull engine and tranny all as one it would be a lot easier then trying to lift the tranny up through floor, into cab and then out the door. Then the engine would be out and truck would be nice and light to move around.
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From: NM
Yokes are readily available for most trans/rear ends at several places, including Denny's Driveshafts, http://www.dennysdriveshaft.com/. It's a very informative site if you are doing a custom shaft.
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From: NM
As far as pulling the engine and trans, Pulling the engine & trans together is a whole lot more work if all you want is the tranny. Get a chertry picker thru the door and the tranny alone isn't a big deal. You can support the back of the engine by putting a 2" pipe or similar steel across the frame.
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I thought about that, problem is the truck do'nt roll, more like skids and slides. I will have to manuvure it into or just outside of shop door and extend cherry picker as far as it can reach while staying on concrete. Not going to be easy.