I will be swapping out my g52 tranny for an R151f soon and am wondering if my drivelines will bolt up or if I need a triple drilled flange. I also have the flanges from the r151f drivelines, would that work?

 

The transmission of course will not have any flanges on it. So it depends on what t-case you'll be using. If keeping your existing t-case, then no change, if using the 23-spline R151 case, then it'll depend on what flanges are on it. Measure the bolt hole spacing and see if it matches what you have:
- http://www.4crawler.com/4x4/ForSale/...l#Introduction

If different, you could swap out the flanges off your existing case, re-drill the flanges on the new case or put on the triple-drilled flanges.

 

I am using the 23 spline transfer case and I can't look at it because it is being shipped and I don't have it yet. Thanks for the link, I will probably just swap out my flange onto the new t-case if it doesn't fit, I should have thought of that one. I am a noob so hopefully this all goes well!