need to know gear ratio in truck

i have a 1990 chevy c/k 1500 pickup with a 350ci engine and it has an axle code "b" with the code eu4 on the sticker in the glove box. I would like
to know what the gear ratio is. Thank You
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List all the "Gxx" codes from the RPO sticker in the glove box. If you meant "GU4" and not "EU4", it's a 3.08 ratio.
Steve

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"Steve Mackie" wrote:

you
A GT4 is a 3.73 and a GT5 is a 4.10 and a simply way to be sure is to jack up one rear tire and rotate it one turn exactally and count the drive shaft revolutions and multiply it by 2 and you will have the gear ratio (spider gears double the drive shaft revs when one wheel is stationary so a 3.08 will rotate the drive shaft about 1.5 times)
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