7200# rear axle (HO72) extreme application

[stillsmokin]

Hi everyone, I'm new on this forum, but not new to old 4 wheel drives.



I have a 7200# axle (ho72) question thats a little different than most. I have seen many 7200# axles in hot gas sled pulling trucks. I have a 4.57 ratio7200# axle coming my way from a 67 2 wheel. If I were to put a 7200# axle under say a 92 dodge diesel (anticipating the pinion dislocating on the current dana 70U) how will it hold up? I was thinking of trussing the axle tubes, using a 14 bolt mini spool/welded to the carrier for reinforcement and 14 bolt axle shafts. Or can I get something even stronger? The yoke is too small for the dodge u joint so I need to do something there, think it's a 1410 joint.

It would be alot more cost effective vs. a dana 80 and would be more of the correct width and look for the dodge. Plus used parts are everywhere and fairly inexpensive which is not the case with a dana 80.

The 7200# axle is pretty similar to the 80. Both have 2" pinion shafts, they have similar sized axle shafts 1.5" although the 80 has 35-37 spline axles vs. the 30 spline 14 bolt shafts, the 80 has a little more in the ring gear and it's bolt circle is a little larger.