55 Custom Cab Interior Trim

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Feb 25, 2026 | 11:04 AM

#16

bmoran4

Parts Nerd Extraordinaire

Joined: Sep 2010

Posts: 4,353

Likes: 1,775

From: Western NY

F6DZ4G12575
F6=F-6
D=223, Z=256
4=1954
G=Chicago or C=Chester
12575=serial component

16000 gross weight
154 wheel base
120 horsepower
3600 RPM

50D=5 speed overdrive transmission

I can't make any sense of the obliterated rear axle code

B=Sheridan Blue
14-B-187 production code which would be the 14th of February.

Last edited by bmoran4; Feb 25, 2026 at 11:07 AM.

Feb 25, 2026 | 11:16 AM

#17

wmjoe1953

Thread Starter

Cargo Master

Joined: Sep 2004

Posts: 2,906

Likes: 82

From: Oregon

Quote:

Originally Posted by bmoran4

I think it’s “F60” which should be how they started out in 53. I’m also confused by the HP rating of what appears to be a 256 equipped truck. The 256 was a little more horsepower than the 239. The 239 should have been 130 for 54 and 132 for 55, and the 256 should have been around 140.

Feb 25, 2026 | 11:24 AM

#18

abe

Fleet Owner

Joined: Dec 2000

Posts: 25,365

Likes: 5,377

From: Central PA

Wow, Brian, you cleaned that data plate up real good. Thanks!

But there is one minor error. On 53-56 trucks they used 2 digits for the truck series. For example an F100 would be
F10 and F250 would be F25. So the engine code is Z for a 256, which was the optional larger engine.