By internal hub you mean inboard so to change the rotor the whole hub and bearings and all that good stuff has to come out aswell?

 

When you attack the frame, drop the fuel tank down and clean out behind it. These truck are notorious for frames rotting out behind the tank, as dirt, leaves, mice and other junk gets in there, and traps moisture.


Here's my KDP with pix. Not difficult if you have some tools, and can turn a wrench in the direction that makes screws come out, or go in....


https://www.dieseltruckresource.com/...2-t305946.html

 

No, either way, to change rotors, you have to go through all that fun stuff.

See how all you see of your lock-out hubs is the shiny chrome cover (and 6 small allen-head cap-screws)? Those are "internal hubs".

External hubs would be black. have a big ole' **** you turn for engagement, and be held on by 6 9/16" head bolts.

Your truck would have come with external hubs.

 

My 90 donor has the internal hubs. My dads 89 has the externals though.

 

Are you old enough to remember the old "lever lock" hubs? Those were even more fun than the selector **** style.

 

Really? I could very well be wrong! But, I was under the impression that the internal hubs came about at the same time as the intercooler and overdrive automatic, in 1991.5'.

But, now that you say that, I had a 1990 gas engine W350 a long time ago that had an internal hubbed dana60 under the front of it.

But, the donor for my Cummins ramcharger was a 1990, and had external hubs.

Hmmmm?

 

Ohh yea! "dualmatics", weren't those fun!

 

My 90 has the internal type on the D-60...Mark

 

It seems like every time I think I have these trucks figured out somebody has one that is different. I have come to the conclusion that that the first gens (maybe all) are a mixed bag.

 

Thanks I couldn't remember the name.

 

Can any of you help me figure out what the paint codes are for this truck I cant seem to find anything on it anywhere?

 

In Post #14 of this old thread:

https://www.dieseltruckresource.com/...d.php?t=307483

I attached the Technical Service Bulletin issued by Cummins detailing how to repair the KDP. Our First Gen trucks have the "bossed housing."

I suppose this defect was considered "non-safety related," as neither Cummins nor Dodge saw fit to issue a recall.

At this point you're on your own if the pin falls into the timing gears and ruins your engine.