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Old 04-22-2025, 07:03 PM   #1
scott123
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cab m easurement

My factory mounts for the cab in the back, one is sagging some and the cab does not sit level. What is the measurement from the bottom of the cab to the chassis? How high does the back of the cab sit off of the chassis?

Scott
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Old 04-22-2025, 07:06 PM   #2
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Re: cab m easurement

1950 Chevrolet 3100. I forgot to add the most important part. LOL

Scott

Last edited by Rickysnickers; 04-23-2025 at 09:22 AM.
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Old 04-22-2025, 07:07 PM   #3
dsraven
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Re: cab m easurement

you may want o put your year of truck in the title someplace.
if it's a task force there is a free download for the factory assembly manual online at the trifive site. there are frame drawings etc that show that dimension
try googling
55-59 chevrolet truck factory assembly manual
pick the trifive site
download to a stick for future access
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Old 04-22-2025, 07:09 PM   #4
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Re: cab m easurement

hyou musta been typing at the same time as me, lol.
sorry, dunno that one and don't know of a free download for the factory assembly manual.
you could try the old cars manuals project
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Old 04-22-2025, 07:13 PM   #5
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Re: cab m easurement

try this
http://chevy.oldcarmanualproject.com...esto/index.htm
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Old 04-22-2025, 11:28 PM   #6
leegreen
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Re: cab m easurement

1 7/8 " from top of frame to top of floor

Name:  Capture.jpg
Views: 116
Size:  35.0 KB

mr48chev has a better scan from a manual in his collection showing from frame to cab mount, but I lost the link
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Old 04-23-2025, 12:34 AM   #7
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Re: cab m easurement

I've got it plus hood adustement instructions saved here https://photobucket.com/bucket/c5e80...c-87a31c3a5b15


Rear


Front

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Old 04-23-2025, 09:03 PM   #8
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Re: cab m easurement

This is a good start.

I can use it as a start point. Line up from there.

Thanks.

Scott



Quote:
Originally Posted by leegreen View Post
1 7/8 " from top of frame to top of floor

Attachment 2420079

mr48chev has a better scan from a manual in his collection showing from frame to cab mount, but I lost the link
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Old 04-24-2025, 12:17 AM   #9
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Re: cab m easurement

If I am reading it right it is 1.83 at the front and .76 at the rear.
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My ongoing truck projects:
48 Chev 3100 that will run a 292 Six.
71 GMC 2500 that is getting a Cad 500 transplant.
77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.
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Old 04-24-2025, 09:54 AM   #10
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Re: cab m easurement

Well, I'm confused now! It doesn't say .76 it says +76! The + isn't that big it is a + not a . this is weird. I went out and got under my truck after reading these numbers yesterday and mine measures 1 7/8" at the rear. The fit to the running board and apron is perfect.

And by the way, on this subject I have seen a number AD's at car shows lately and my wife noticed damage to the cab from the apron on one so I looked at every truck I saw there and almost every one had damage to the rear fender or the cab from the running board apron. I will be looking at this a lot closer on mine!

Brian
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Old 04-24-2025, 10:37 AM   #11
leegreen
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Re: cab m easurement

it say .76 +/- some fraction I can't read. so roughly 3/4 inch gap between frame rail and the rear floor brace.

and mr48chev's scan, near the edge of the picture I think shows 1" and change gap between frame and floor brace at front
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Old 04-24-2025, 11:29 AM   #12
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Re: cab m easurement

Ahhhhhhh, first off, it's from the top of the frame to the rear floor brace so I was off there. I just went and measured mine and right there at about 7/8".

Sorry

Brian
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