CK5
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What gear ratio is in My 82 Blazer?

take a look in the glove box for the RPO code.
or pull the diff cover and look at the stampings.
 
my 89 burb diesel came with 4.10's, I also have the th400.
my buddies 85 came with 3.08s as did my other buddies 86 truck. one with a 700r4 and one with a manual
 
Odds are they are 3.08, but you never know...... /forums/images/graemlins/rolleyes.gif
 

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