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TreeTop 06-30-2012 11:57 PM

1949 dodge b1b truck
What is the size ratio in a 1949 Dodge B1B truck? Looks like a 8 3/4 but thety did not come out till the mid 50's.

MY49ER 08-13-2012 05:36 AM

just starting a 49
here is a link to the site i use to get all the info you will need to work on that truck Pilot-house Truck Knowledge hope this helps

MY49ER 08-13-2012 05:48 AM

more info
from the book could be 3.73,4.1,4.3,or4.78 to know look at diff. just under the fill on the passenger side bottom should be stamped in the diff hub

TreeTop 08-15-2012 08:04 PM

1949 B1B RearEnd
The ratio is 4.78 . Does a 1948 plymouth rear end fit? Plymouth is A body and the doge truck is B body. The measurements are off less than 1". Not sure about the ange of the bird perch?

MY49ER 08-17-2012 06:42 AM

Axle Type Semifloating
Differential Hypoid
Differential Ratio 3.90

MY49ER 08-17-2012 06:45 AM

after looking up 48 Plymouth with some mod it will work with a 3.9 ratio it will help you will need to move the spring on the rear end to reset the angle

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