What an original T-case looks like

[Firebirdjones]

I thought I read somewhere here a while back people asking what type of finishes were on the transfer cases.
I was finishing up a tranny mount and while I was under there I snapped a few pics.
Granted it may have been different through out the years,,,but here is one that is unrestored on my 72 blazer.
Easy to see the red exide primer,,but what I find interesting is that all the flat machined surfaces are bare, including the letters. Leads me to believe maybe this thing was primed before the machining process.
All the aluminum parts are just that,,,bare aluminum. What was interesting on the aluminum parts, is that all the bolts holding them in also have red oxide primer on them. Not sure if you can make that out in the picture or not though. Thought this might help the resto freaks out there
Just to add,,,,the factory skid plate that was optional under the T-case was bare steel. Kinda strange, it had mild surface rust with no paint anywhere. Yet the crossmembers as well as the frame still has their original black paint present. Weird GM didn't paint the skid plate, at least on mine anyway.


And since I was under there,,,here are a couple of snaps of a rust free torque box. Along with the inner bedside on the driver side, I took that pic because you can still see chalk markings on it. Don't ask me what "92" means, but it's cool to see. There are quite a few chalk marks on this truck in some of the strangest places.

[John H.]

"92" is probably the job number for the original build. If you looked on top of the brake pedal assembly, the gauage cluster, brake booster and maybe the front crossmember you may see this number there too. I have seen it under the passenger fender next to the cowling too. My Jimmy had 603 on all these areas.

I am assuming the line worker reviewed the build sequence and prepared parts to be assembled depending on the build sheet option list. I have owned trusks with 19-33K original miles and this was the same with these trucks too.

Since we do not have the truck version of NCRS, I am making assumptions based on my learnings with the Corvettes.

[Firebirdjones]

Ya I'm familiar with that. We had a vette that was survivor status and went through that whole process,,,lol.

My 79 chevy truck as well as my 71 ventura, both original paint and unrestored, has similar chalk numbers as well that I can see inside a couple of the body panels.

[sharpie1972]

Great pictures. Thanks for the info! Did you add the speedo adapter, or is it factory? What gear ratio? Thanks, Sharpie

[Firebirdjones]

Originally Posted by sharpie1972

Great pictures. Thanks for the info! Did you add the speedo adapter, or is it factory? What gear ratio? Thanks, Sharpie

It originally had a speedo adaptor from the factory. But when I jumped to a 33 inch tire I had to recalibrate, so I had that one made specifically for it.
It has 3.08's.