Originally Posted by 95naSTA
You could probably make one swaping the sun gear and planetary pinion gears from the 3.05 diff into the 3.29 HD diff.
That was my next thought. In my mind, I don't see that as possible, though.
I know they all use the same outer ring gear (78 tooth fine pitch). I know the sungears have different tooth counts (34 for 3.29, 38 for 3.05), from which I would assume they are different diameters, and that the planetaries would therefore have to be different diameters also.
If this is so, then I don't see how the shafts for the planetaries could be the same size and/or in the same location on the carrier...I would think these shafts on the 3.05 would have to be either drilled further from center or be a smaller diameter than on the 3.29.
I've got a 3.29 HD diff sitting here. I may have to scrounge up a 3.05 non-HD diff to see if this is possible.