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Old 09-26-2008, 07:16 AM   #1
stillsmokin
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Join Date: Sep 2008
Location: The Midwest
Posts: 30
7200# rear axle (HO72) extreme application

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.
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86 Chevy K30 Crew Cab, USAF(retired), TH400/NP205, 28K miles
99 Chevy (88-98 Style) Reg Cab LS, K2500 454, nv4500
92 Dodge, Cummins, SLED PULLER, 5'' hood exit, NV4500UHD, dual disk clutch, Borg Warner S400 charger, GM 7200#/14B hybrid rear

Dads...

69 GMC k2500, 427, 4 speed, Rockwell 221, 7200# rear, detroit, disk brake front, 5.13's
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