Dear community,
I do have a D250 that I am thinking about converting to a 4 WD.
If I need a transfer case anyway and need to work on my driveshafts - why not upgrading to a 47RH (Has TC-Lockup)?
There is one for sale close with a transfercase.
So the question is: How do I identify that it is a 47RH?
And the torque converter has a bigger diameter. Do I need a different flexplate? Or is it due to the lockup device?
Has anyone ever done the upgrade?
What were your experiences?
Best regards.
Jörg

 

you have to change your adapter between the motor and tranny as the converter is thicker and check the plug on the side of trans to make sure it is not an RE

 

...the seller has the adapter. Does anybody know what the serial number should look like?
Also it looks like the front driveshaft output is on the drivers side. At the 1st gen. it is on the passenger side. Can I just rotate the last part of the TC to make that work, or do I have to use my old TC - does that even fit?

 

Look for three small pins, not the neutral/reverse connector, that's a 47rh. The RE Trans will have an eight pin round connecter. I just did the conversion, and I'm very happy with it. Went from 13-15 to 17-18 mpg. 65 mph, 315/70/16's and 3.55's I'm running about 1650 rpm. You can carry on a conversation in the truck now!

 

Which Transfercase can I use regarding spline count and drop of the front driveshaft (should be on passengers side)?
Thanks.
Joerg

 

You're gonna need an np-205 passenger side drop and I do believe it's a 32 spline count input shaft somebody correct me if I'm wrong

 

Correct on the 205. Dodge automatics ran a 29 spline shaft whereas the manuals ran 32 spline. There are adapters out there if you can't find one you need.

 

...can I still use my old (from the 727) corssmember, or do I need the one for the 47rh?

 

I modified the existing cross member. Make sure metal doesn't touch metal, sounds like it's going to come apart.

 

Some people say you can upgrade a 727 to a torque converter lock-up?
Has anybody ever done that?
Thanks. Joerg