F1 & F4 differences?
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F1 & F4 differences?
Can someone tell me what the differences are between a F1 and a F4 truck.
I have a F1 that's rusted and found a clean F4 cab and don't know if I can use it as a replacement? I also would like to know if the frames are interchangeable?
Thanks,
Dan
I have a F1 that's rusted and found a clean F4 cab and don't know if I can use it as a replacement? I also would like to know if the frames are interchangeable?
Thanks,
Dan
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Joined: Nov 2007
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From: Guelph
The cab is the same as far as I know.Its the front fenders that are different. The wheel opening are bigger.As far as the frame goes it will be thicker. The spring will be a lot heavyer. It may be longer out back as well, did it have a box on it or a flat bed?
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From: SE Wisc. (the Rust Belt)
Frames are definitely not interchangeable. The F-1 is a lot lighter in design. Most sheet metal parts are interchangeable, but as mentioned, the front fenders differ. The F-1s have smaller wheel openings, the F-2 through F-6 share front fenders. I have a page set up on my web site that lists what parts fit each model:
Body Part Interchange Guide
Body Part Interchange Guide
Post Fiend
Joined: May 2008
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From: Poway, Ca.
The wheel base is longer on the F4, so the frames are definately not interchangeable. If the F4 had a box on the back, it would have to be the longer/wider "Express Box" as opposed to the "Pick-up Box." After 1950, the Pick-up Box did not have the paneled sides. Paneled bed sides meant indented back fenders. Also, F1 back fenders are wider (by 2 1/2 inches each) to cover the wheels with the more narrow box
Because of the longer wheel base, the running boards are longer, tailgate is wider. Wheels on the F4 are 17"....16" on the F1. Front fender openings are 2 to 3" bigger on the F4 and the lower fenders are different. Of course the frame is heavier and the suspension is quite a bit heftier.
So, the things that are interchangeable between the two are: Hood, Cab, Doors, Glass, Upper and Lower Valance, Wind breaks, Grille, Inner fenders, Radiator; Engine compartment sheet metal; and drive train.
Hope that helps,
Julie!
Because of the longer wheel base, the running boards are longer, tailgate is wider. Wheels on the F4 are 17"....16" on the F1. Front fender openings are 2 to 3" bigger on the F4 and the lower fenders are different. Of course the frame is heavier and the suspension is quite a bit heftier.
So, the things that are interchangeable between the two are: Hood, Cab, Doors, Glass, Upper and Lower Valance, Wind breaks, Grille, Inner fenders, Radiator; Engine compartment sheet metal; and drive train.
Hope that helps,
Julie!
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From: SE Wisc. (the Rust Belt)
Julie,
The F-4 didn't come with a box. Maybe a flatbed or other type of work body, but not a box like a pickup. The F-1, 2 and 3 were the only models that had a factory pickup box. F-4 also had Budd type wheels, like the larger F-5&6. The F-4 came with 18" wheels, if equipped from the factory with rear dual wheels, 20" if single rear wheels. The drive trans were the same as the larger trucks, nothing in common with the F-1s other than the engines. Some F-1s did come with heavy 4-speeds which I think might be the same as the larger trucks but I think they might have had their own 4-speeds. The F-4s had the short running boards, the same as the F-1 through F-6 flatbeds, they didn't have the long boards at all.
The F-4 didn't come with a box. Maybe a flatbed or other type of work body, but not a box like a pickup. The F-1, 2 and 3 were the only models that had a factory pickup box. F-4 also had Budd type wheels, like the larger F-5&6. The F-4 came with 18" wheels, if equipped from the factory with rear dual wheels, 20" if single rear wheels. The drive trans were the same as the larger trucks, nothing in common with the F-1s other than the engines. Some F-1s did come with heavy 4-speeds which I think might be the same as the larger trucks but I think they might have had their own 4-speeds. The F-4s had the short running boards, the same as the F-1 through F-6 flatbeds, they didn't have the long boards at all.
Post Fiend
Joined: May 2008
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From: Poway, Ca.
Julie,
The F-4 didn't come with a box. Maybe a flatbed or other type of work body, but not a box like a pickup. The F-1, 2 and 3 were the only models that had a factory pickup box. F-4 also had Budd type wheels, like the larger F-5&6. The F-4 came with 18" wheels, if equipped from the factory with rear dual wheels, 20" if single rear wheels. The drive trans were the same as the larger trucks, nothing in common with the F-1s other than the engines. Some F-1s did come with heavy 4-speeds which I think might be the same as the larger trucks but I think they might have had their own 4-speeds. The F-4s had the short running boards, the same as the F-1 through F-6 flatbeds, they didn't have the long boards at all.
The F-4 didn't come with a box. Maybe a flatbed or other type of work body, but not a box like a pickup. The F-1, 2 and 3 were the only models that had a factory pickup box. F-4 also had Budd type wheels, like the larger F-5&6. The F-4 came with 18" wheels, if equipped from the factory with rear dual wheels, 20" if single rear wheels. The drive trans were the same as the larger trucks, nothing in common with the F-1s other than the engines. Some F-1s did come with heavy 4-speeds which I think might be the same as the larger trucks but I think they might have had their own 4-speeds. The F-4s had the short running boards, the same as the F-1 through F-6 flatbeds, they didn't have the long boards at all.
However, all that aside, what I mentioned in the first paragraph about the frames not being interchangeable, and in the last paragraph about what is interchangeable - in answer to the question, that's still true with the exception of the drive train as you noted.
J!
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Thanks all for the informaiton. After looking at the cab I found that the floor looked new but the top of the cab was junk. The guy stated that it was a state truck so attachments were added to the top and removed over the years. It's to bad because the rest of the cap looked great.
Thanks again for all the info! Dan
Thanks again for all the info! Dan
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From: SE Wisc. (the Rust Belt)
If the floor is in like new condition, and the price is right, I'd still grab it. Usually the worse part on these cabs are the floors. You can buy patch panels but they're only from the seam at the bottom of the toe board back to just under the front of the seats. If the toe board going up is rotted, which it always is, you have to make your own hokey patches, no one makes them. I bought a F-6 with a crushed roof mainly because the floor was almost perfect.
Have you thought of grafting your roof to the other cab's bottom half. It's really not that hard. I did it with a panel truck. There are a lot of body lines that will hide the joining seams.
Have you thought of grafting your roof to the other cab's bottom half. It's really not that hard. I did it with a panel truck. There are a lot of body lines that will hide the joining seams.
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