what rear end is in my truck?

[ryan243]

i have a 90 silverado 2wd std cab long bed , and this thing wont move in the rain so i was going to look into a lsd or mechanical locker, but not sure what rear end i have. any info would help, thanks

 

[95C1500]

Most likely a 10 bolt
Try this, top right.
http://www.lmctruck.com/icatalog/cd/full.aspx?Page=129

 

[Murd450]

It's a 8.5

 

[Murd450]

Assuming its a 1/2 ton

 

[great white]

RPO code for the axles (and more) is in the glove box.

You can look it up anywhere on line by googling "RPO codes"....

 

[Murd450]

Also should be a tag on the rear providing it hasn't rotted or been taken off . I know my last 2 were 3.42 gears . But if its a 1/2 ton and not a 454ss it will have a 8.5 in it .

 

[great white]

Also should be a tag on the rear providing it hasn't rotted or been taken off . I know my last 2 were 3.42 gears . But if its a 1/2 ton and not a 454ss it will have a 8.5 in it .

Normally, yes.

But I've seen weirder things come out of GM's big doors. It's taught me over the years to not make "absolute statements" about this sort of stuff.

That's why I go to the RPO codes first (if I'm not looking directly at the truck).....

 

[94Sierra4x4]

I'm sure you other guys have the rear end stuff handled here.. lol,
but my guess is you need some better tires if you can't move it in the rain,

 

[thz71]

Also should be a tag on the rear providing it hasn't rotted or been taken off . I know my last 2 were 3.42 gears . But if its a 1/2 ton and not a 454ss it will have a 8.5 in it .

that's wrong a lot of 1500s came from the factory with 14b sf show me a pic of your rear end ill tell you which one it is

 

[94Sierra4x4]

that's wrong a lot of 1500s came from the factory with 14b sf show me a pic of your rear end ill tell you which one it is

My 1500 with the F44 package has the 14b SF. My 1500 without F44 had the 10 bolt.