Transfer case questions

**Jake** · #1 (**permalink**) 01-30-2012, 03:15 PM

Got a couple of questions about SD t-cases. First off, what is it called? If i remember right, the manual linkage tcases are NP271, and ESOF is NP273. Is that right? Next, what are the differences between the tcases behind a 4r100 and a zf6? I know the input shaft is different, but is that it? We did a ZF6 swap in my buddies truck and we need to know this stuff so we can finish it up.

**Jake** · #2 (**permalink**) 01-31-2012, 12:46 PM

Freedombyforce · #3 (**permalink**) 02-02-2012, 06:03 AM

My ESOF has 273 wrote on it. I'll have to check my manual shift, but I believe you are right on it too. That is the only difference in the cases. Both will bolt up to either tranny with the input shaft change. I personally went to the manual case with my zf swap just to get rid of all the "e" stuff.

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