we have two different gear ratios and yokes in the crossfire from the factory.
SRT has 3.07 ratio and it has the larger yoke,
the diff housings are the same so this can be interchanged (not the yoke)
Limited has 3.27 gear and it has the smaller yoke
example if you wanted to put a 3.27 diff into a srt6 you would start by removing the yoke get a new squish washer and re torque it with the srt (larger) yoke . now you will need to program your tcu to the new gears.
with the 6 speed Limited you do not need the tcu programmed because there is no tcu in the 6 speed cars ,,you would need to get the correct axles and the yoke . the yokes are small 3 1/2" the large 3 3/4"
you see some cars came with two piece axles ,,and some came with one piece axles. the two piece goes for the limited ,,the srt came with one piece axles
yoke%20small%20from%20limites_z.jpg?1450227427708&1450227429495&1450227432738&1450227434156
here are some pictures for you
yoke%20large%20for%20srt%206_zp.jpg?1450227427707&1450227429495&1450227432709&1450227434156
this diff uses the one piece axle
start reading here !!!!!#5,6,7.& 3 make up the two piece axle with the #5, C-clipped in the diff. and 6,7,& 3 are factory assembled//////////the one piece axle to the left is a the Crossfire srt
this is the axle stub that some crossfires come with and the is the two piece axle
here is how to remove the differential and the axles,,
https://www.crossfireforum.org/forum...removable.html