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. |
Re: 7200# rear axle (HO72) extreme application
I'm running a 14-bolt in a 700ish HP super stock puller.....Unless you're making more than 800 HP and your rules allow it, you can't beat the 14-bolt!!! they're everywhere, the pinion style is stronger than the D80, they're cheap, and easy to get parts for, like yokes to match your driveline.
A........ |
Re: 7200# rear axle (HO72) extreme application
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Nice truck by the way! |
Re: 7200# rear axle (HO72) extreme application
There are a large number of modified diesel 4x4's in our club, but, I've never looked to see what rears they are running??? Most are newer vehicles, so I'd say they are probably factory D80's.....
The H110 may be an option also, if rules allow. A.......... |
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I have a H110 third here but it's a 6.17 ratio, besides can't run it anyway (1 ton or smaller axle rule), I need to be at 4.56 anyway. I did a little fooling around with the truck the other day, a friend did some video.... |
Re: 7200# rear axle (HO72) extreme application
Im pretty sure i have been told the HO72 EATON comparable to the 14 bolt. The 14 bolt is a newer design that replaced the HO72. The only real problem with the HO72 is there is not really any aftermarket products. I run the HO72 but i have not had the hp to put it to the full test. With my planned 472 big block hopefully going in this comming spring i will see how she holds up.
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Re: 7200# rear axle (HO72) extreme application
BTW NICE CUMMINS! i kinda like the pre 94 cummins trucks. See ya sat in broken bow if your coming.
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Re: 7200# rear axle (HO72) extreme application
Nice dodge. I have a few good threds book marked on upgrading the eaton here are some good ones may help you out some.
http://www.pirate4x4.com/forum/showt...ght=eaton+1410 http://www.pirate4x4.com/forum/showt...ht=1410+flange http://www.pirate4x4.com/forum/showthread.php?t=250006 |
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Re: 7200# rear axle (HO72) extreme application
Nice truck!
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I just heard in a conversation how a ford puller down the road ran a 14 bolt for a few months last year because he kept breaking axle shafts in a dana 60. Then, he found more power and twisted off the pinion in the 14 bolt, He then went with a 5200/7200# axle and he is now twisting the driveshafts off at the middle of the stubshaft, they wanted advice. |
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