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are cab chassis frames the same

Old Sep 10, 2010 | 07:31 AM
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From: Wheeling WV area
are cab chassis frames the same

f250-f550? The same thickness and all?
 
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Old Sep 10, 2010 | 12:01 PM
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I believe the height and width are the same on the chassis cabs ('08-'10 F350-F550), but the thickness changes with GVWR. The higher the GVWR the thicker the frame. The number of cross members also vary depending on cab configuration and wheel base.
 
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Old Sep 10, 2010 | 12:14 PM
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also the cab to rear axle measurements are different, cab-chassis rear axle sits further back on the frame about 4" or so.
 
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Old Sep 10, 2010 | 12:59 PM
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well im speaking of a 2000 f250 cab chassis. its a srw and i found a good deal on a wrecked f450. i wanted to convert it to a f450 but was wondering about frame thickness ,height, and strength
 
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Old Sep 10, 2010 | 05:02 PM
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All F250's cab/chassis are pickups with a box delete. The F450/550 are completely different frames.
 
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Old Sep 10, 2010 | 07:03 PM
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Yep, when we were looking I looked into box deletes vs. cab and chassis and they are WAY different beasts. IIRC the frame width was one of the big differences.
 
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Old Sep 10, 2010 | 08:48 PM
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cab chassis f250 -i have one and it's 34 inches ouside rail to outside rail. I have a pick up f250 and it's 37" or 38" rail to rail. the cab chassis frame is also straight after the cab. the pick up has a small hump by the rear wheels. i'll have to measure my oolder SD tomorrow for thickness.

I believe all cab chassis are 34" wide. even my 98 f800 is 34" wide as well as my Isuzu rollback and the 2000 f250 cab chassis is also 34" wide.
 
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Old Sep 10, 2010 | 08:58 PM
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That's the way it is supposed to be. All chassis cabs have standard 34" frame rail width and is straight just like you have noted. I think the frame thickness on an F350 chassis cab is around .280". It might be the same on the F250 chassis cab, but I'm not sure.
 
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Old Sep 10, 2010 | 09:37 PM
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pick up and cc 250 look like 1/4" so does 90 f450. cab chassis also has pear shaped hole in frame. i think for fuel tank neck
 
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Old Sep 10, 2010 | 10:08 PM
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You should use a micrometer to get the thickness.

Those F450s in your sig. - aren't they just called Fsuperduty, not F450???
 
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Old Sep 10, 2010 | 10:14 PM
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This should help

Originally Posted by mrblonde108
f250-f550? The same thickness and all?


Go to the publications section. Vehicle Specs. Then Specific Vehicles. It list specs for different model years.



https://www.fleet.ford.com/truckbbas...s/hotinfo.html
 
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Old Sep 10, 2010 | 10:20 PM
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Originally Posted by Rickx

Thanks for posting that body builders link. I was looking for it and couldn't come up with it.
 
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