Ive done my research and I still havent gotten a straight forward answer. I know my '91 p-drop 241 transfercase is gunna bolt up to the 60E with no problems, but how do I wire it in place of the auto-crap unit? Will one of the plugs off the stock unit fit into the transfercase plug hole? If so, what do I do with the other wires? If someone could explain this conversion with some more detail I'd greatly appreciate it. -Austin

wow I am a little confused on the other thread you said that you already wired it and that it was easy "all i had to do was remove the fuse" after i posted that I could explain how to do it????? not quite understanding you?

if you really want to know though i would be glad to tell you.

My bad, Sorry If i confused you, sometimes I type other things than what im thinking.

I have BOUGHT the 241, and I will be putting it in within the week. ( i just got my SAS done so now im moving onto this. ) Ive got my clocking ring bought to put it up enough to clear the stock crossmember so now i have to wire it correctly.

Ive heard of many other people running this transfercase without any problems once removing the fuse. This is what I intend to do, unless someone tells me other wise. What is the best way to go about this? Any help would be appreciated. I will be making a shifter eventually that runs into the cab, untill then, i just want it to be driveable in 2 and 4wd. -Austin

you need to wire it?

its a manual shift transfer case.

if youre worried about an idiot light, learn to look at the shifter.

I have to wire it for the speedo and so my transmission will function correctly with the case in 4wd and 4lo. Thanks -Austin

why would you need to make a shifter?? Can't you just run the factory shifter that came with the transfer and cut the floor out or is there a space issue?? :confused:

Does Arkansas have a height limit?? I saw you're running 40's so the speedo probably wouldn't be correct anyhow unless you recalibrated it right??

I think he needs the VSS for the computer.

why not just take the vss out of the other transfer case and install it in this one? wouldnt that be the easy route?

or do they not interchange?

I think he needs the VSS for the computer.

why not just take the vss out of the other transfer case and install it in this one? wouldnt that be the easy route?

or do they not interchange?

I'm pretty sure the rear VSS plug off the autotrac case will work in the 241. If not, all the OP should need is the correct VSS plug (a 2wire). Then splice in the green and purple wires IIRC. I believe the nv246 case has a 3wire VSS plug.

When goin from a tcase that has a TCCM in the dash to a manual Tcase the Trans WILL NOT shift in low range because it is not reading the correct Low range signals in the PCM. How I know? It is doing this in my buddies 97 SAS'ed Z-71 with a 241 swap. He had 1st gear and 2nd. only and he had to manually shift them. In the mud he couls have used 3rd geard but the trans wouls not allow it due to the signals not being received formt the TCCM. He had a NP243 stock. Possibly if he left the stock switch and made the selector select low range and manually shift the tcase aswell it might have worked.
With the help of a few guys on Gmfullsize we figured out a way to make it shift properly in low range.
I hope this helps you guys. I have put up pictures of the GM service manual plugs you you know what wires need to be grounded.
http://www.gmfullsize.com/forum/showthread.php?t=154868

I had the same problem on my 2001 just like I told 4x4cc before and he spoke against me in another thread.

the understanding I have from a couple gm engineers is that that trans goes into "limp home mode" and only allows certain gears and rpm's.

Out of the 4 VSS's on the autotrac there is only 1 that controls the speedo and transmision. it would be hard to explain which on here but if you pm me i can give you pictures of it and my number to call.

Once that is hooked up on the 99' everythign should work fine until in low then you might "i did" have problems with it shifting due to the tranny not knowing you are in low and adjusting for the gearing.

So my fix to the problem was a VSS between the trans and tcase, now the trans always shifts like it is high. and I get to manual shift it. In my case I used a doubler, and with the 4to1 it is nice to get up into 3rd gear.

There is a controler under the dash I un hooked it and also all the wires leading to the tcase i removed all the way back the big fuse block under the hood. It was 1 big harness.

For me now everything works perfect and I don't have to worry about programing my computer or anything else.

I am sure there are other ways around this minor problem you just have to have the time to figure it out.

For me I also liked the idea of a iron adapter and a well built one from advanced instead of the weak cast aluminum ones from the factory before my doubler.

here are some pics of what i have just one vss and no extra bullshit from the autotrac (the extra wires u see are the O2 sensors from the exhaust im working on)

Take it for what its worth but this works for me!

http://c1.ac-images.myspacecdn.com/images02/79/m_0997bbb531b04b2e8740c4ac7b635524.jpg
http://c2.ac-images.myspacecdn.com/images02/79/l_0c5978a7f6f040d48ef5d5c1a5606ba9.jpg
http://c1.ac-images.myspacecdn.com/images02/70/l_e3bd0897fa2d49cd8becf116a516ee5c.jpg
http://c4.ac-images.myspacecdn.com/images02/106/l_bfece5ff59ba41059d5e7dcc90c5e7ef.jpg
http://c2.ac-images.myspacecdn.com/images02/103/l_147412fc30a94397899e9a036f26d31d.jpg

I plan on using a shifter found in blazer that I stole the xcase out of. But i need to get my truck/ tranny running correctly first.

yes there are lift laws. 54" to the headlights and 72 to the tailights. Other than that im fine. Its my daily driver

With 4.88's and 40's, my speedo is only off 2-3 mph. Not too bad, ill get it reprogramed once i install a cam later down the line.

As for the wiring, thanks guys. ive sent a couple PM's and Ill see if i cant get this thing going. thanks alot -Austin

All you need to do is swap the VSS from the Np246 to the Np241. All your other wires will be useless. Tie them up and out of the way and read the link i posted above about getting your transmission to shift properly in low range. I have the pinout diagrams for you guys.

So the VSS plug will pulg into the 243 case? thanks

if you look at the pictures above look for the vss going into the aluminum adapter. you will notice that it is coming from a harness that goes over the top of the tranny. That is the plug that needs to be used for your 241 or whatever vss you use it does not need to be spliced or anything like that. From the factory it has a regular male plug on it and a female to male adapter on it. All you have to do is detatch the adapter and plug it into what ever vss you are going to use.

The other part of the equation is the vss need to be a certain distance from the reluctor ring so as long as you do those two things your speedo will work and your tranny will shift normal in high.

What you do to make it work in high and low is up to you. Maxxis85 is right the other vss's from the 246 are now usless you can totally remove them from the area. It is only that one vss that sends signal to the pcm

Thanks guys. Much appreciated.