Help identifying 12 bolt!

[Wizit247]

So from any of my searches my stamp on my 12 bolt doesnt have as many numbers as it should. can someone more knowledgeable than me decode this? or point me in the right direction.

This is stamped on the passenger axle tube just like it should be. There was only one number cast into the center section. it was tho lower right if seen from the rear. cant remember the number. it started with a G and ended with 55.



Much appreciated!

-Wizit

[GASoline71]

What are you trying to find out?

If it is limited slip and what ratio?

After 40 years... anything could be in there. Unless you're the original owner of the truck. I'd just pull the cover...

Gary

[Wizit247]

Originally Posted by GASoline71

What are you trying to find out?

If it is limited slip and what ratio?

After 40 years... anything could be in there. Unless you're the original owner of the truck. I'd just pull the cover...

Gary

Mostly just what to tell the kid behind the parts counter what vehicle i need parts for.

[Clavo106]

http://67-72chevytrucks.com/vboard/s...d.php?t=578793

[Wizit247]

Originally Posted by Clavo106

http://67-72chevytrucks.com/vboard/s...d.php?t=578793

thanks..
i guess ill keep searching. my axle doesn't match anything in that thread or the countless others ive been through

[GASoline71]

If it's a truck 12 bolt... the early ones had 16 spline axles and then the later ones had 30 spline axles. 1971 was when they were widened a tad.

What parts are you looking for?

Gary

[Wizit247]

Originally Posted by GASoline71

If it's a truck 12 bolt... the early ones had 16 spline axles and then the later ones had 30 spline axles. 1971 was when they were widened a tad.

What parts are you looking for?

Gary

Mostly brakes. potentially diff rebuild.

The diff cover shape is that of a truck axle.

Also, it is 6 lug if that helps any.

[67 chevelle]

what year truck , if its a 68 , ha is a 3.73 open axil , the majority had these

[Wizit247]

Originally Posted by 67 chevelle

what year truck , if its a 68 , ha is a 3.73 open axil , the majority had these

unfortunately its not from the truck originally. It came with a frame that I bought.

[Mike C]

Just take the cover off. Looks like you are cleaning and painting the outside (lipstick on a pig?). So go ahead and clean out the inside and add to new seals and fluid including limited slip additive if needed.

[Wizit247]

Originally Posted by Mike C

Just take the cover off. Looks like you are cleaning and painting the outside (lipstick on a pig?). So go ahead and clean out the inside and add to new seals and fluid including limited slip additive if needed.

As previously stated its not the gearing that Im worried about whatsoever. I need an application to give when buying parts.
If I walk into the parts store and tell them I need brakes for a 12 bolt I will get a blank stare.

[jdw]

Any luck? Here's a bump for you.

[Redline novdog]

The main difference is axle length and 5/6 lug. As stated above splines. If your painting it. take the time pull the cover/measure the axles and housing.You'll know for sure what you have.

[carguygregg]

A picture of the complete rear end might help narrow down the year. If it's a 2wd truck, They had 2 different track bar mount designs depending on yearly or late. All of our trucks used the 11"x2" brake shoes. 60-63 were different from the 64-72, but that was it. I understand the frustration with going to get parts at the parts store anymore....If they can't look it up in the computer, they are lost! I worked behind the parts store counter when you looked things up in books!

[Mike C]

Ring gear will have a date on it if it's original. This is a coil spring truck, correct? They parts should all be the same '66-'72. '63-'65 MAY have some internal differences, I know on the passenger car they first year setup shim pack is different. Can't be any other range than that if a factory coil spring setup.