What other vehicles have a rearend with a 4:10 gear ratio and is it compatible with

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Cindy

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1989 Dodge Ram? Replacing the rearend in our truck.
Currently has semi-floating 9 1/4" ring gear
If rearend is bolted, what modifications need to be made?
What #'s on the rearend tag will tell me if the gears are 4:10 and postitive traction?

Sorry for the 1,000 questions!
Thanks!
 
There is nothing on the tag to tell you it is posi-traction or not. The gear ratio would appear as 4:10 or whatever, just like that. Jack up one rear wheel and put the trans in neutral. If you can turn the wheel it is not posi. I don't understand the question about bolted rearends.
 
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