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Old 02-11-2010, 07:00 AM   #1 (permalink)
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a dumb idea will it work?

i know this is going to be difficult to think about without asking why, but lets try just for discussion sake.
i know the axle is crap im just trying to wrap my head around the idea of a very high clearance front axle on the cheep.

maximum torque output of the engine would be 300ft lbs

what if....

-i take a d30 center section and machine the carrier caps to accept bigger bearings.

-i machine a custom carrier for the ring gear to accept 30 spline axles.

-i fit d60 knuckles on the 30 with a tapered axle tube.

now the real question is.

what kind of load will the ring and pinion take before it fails?
in my experience i find the axle shafts,ujoints and knuckles to be the week link.

im just wondering if the ring and pinion are much stronger than the rest of the week links.

i have some access to a mini foundry so the carrier is a financial possibility for me.

unfortunately a rock 60 or rock assault is out of the question financially.
has anyone ever attempted to "do up" a d30?
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Old 02-11-2010, 07:04 AM   #2 (permalink)
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Andy Andy Andy.... Stay with the 31" tires and the ring will last for a Summer. Go with anything else and your going to waste a tiny 7.5" ring gear in a few days.

I have a 78 waggy D44 Passenger drop sitting here that you can have for one bill...
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Old 02-11-2010, 07:12 AM   #3 (permalink)
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Guess which one will break first?

60 44 30
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Old 02-11-2010, 07:33 AM   #4 (permalink)
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I thought dana 30 ring and pinion failures were pretty common
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Old 02-11-2010, 07:37 AM   #5 (permalink)
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I have a 78 waggy D44 Passenger drop sitting here that you can have for one bill...
sound like you should start with this nice offer here. ^^^
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Old 02-11-2010, 07:59 AM   #6 (permalink)
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i have a d44 hp from a 79 ford i was going to use but the question of ring gear strength has passed by my head a few times as i have broken plenty of shafts and joints but never damaged the ring gear or pinion(aside from bearing abuse)
i guess im just lucky

i was just curious to see if anyone has any real load limits for the ring gear?

i was thinking of running 33s with small diffs for clearance.

like the title says...............
a dumb question

i was also curious to see if anyone has spent some time making a d30 stronger
mabey there just to embarrassed to admit it.


i guess a 44 60 hybrid is the route to go on the cheap
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Old 02-11-2010, 08:01 AM   #7 (permalink)
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Guess which one will break first?

60 44 30
it looks like the tooth size and depth is comparable between the three ring gears not the same but comparable.

i bet looking at the pinion gear would show a different story
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Old 02-11-2010, 09:31 AM   #8 (permalink)
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it looks like the tooth size and depth is comparable between the three ring gears not the same but comparable.

i bet looking at the pinion gear would show a different story
It has little to do with the tooth profile, the little details come down to the size of them but the actual strength differences come from the diameter and contact area of the gears.

Hybrid axles are a horrible idea and should only be considered at the ford 9" level and above. 44/60, 30/44, 30/60, 9"/44, all complete wastes of time and money. 9"/60, 14/rockwell, 14/60, 70/rockwell, all a worthwile investment.

Swapping a dana 44 in place of a hp30 gets you little gain when it comes down to it. if you are staying under 35's then a d30 or d44 will work fine with some polishing. If you are planning 36's or larger then skip the small stuff and go right to a 9" or 60. It's about 2-3k cheaper in the end. To get your clearance all you need is a welder and an angle grinder.
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Old 02-11-2010, 09:35 AM   #9 (permalink)
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-i machine a custom carrier for the ring gear to accept 30 spline axles.
You don't need to do this. 30 spline ARBs and OX Lockers are available off the shelf.
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Old 02-11-2010, 07:52 PM   #10 (permalink)
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It has little to do with the tooth profile, the little details come down to the size of them but the actual strength differences come from the diameter and contact area of the gears.

Hybrid axles are a horrible idea and should only be considered at the ford 9" level and above. 44/60, 30/44, 30/60, 9"/44, all complete wastes of time and money. 9"/60, 14/rockwell, 14/60, 70/rockwell, all a worthwile investment.

Swapping a dana 44 in place of a hp30 gets you little gain when it comes down to it. if you are staying under 35's then a d30 or d44 will work fine with some polishing. If you are planning 36's or larger then skip the small stuff and go right to a 9" or 60. It's about 2-3k cheaper in the end. To get your clearance all you need is a welder and an angle grinder.
thanks for the advice.
ive built a few trucks now and im ready to start chopping up axles and learning some new tricks.

looks like a 44 with a polish is all im going with.

boring but cost effective.
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Old 02-11-2010, 11:54 PM   #11 (permalink)
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Originally Posted by mud bros.1 View Post
thanks for the advice.
ive built a few trucks now and im ready to start chopping up axles and learning some new tricks.

looks like a 44 with a polish is all im going with.

boring but cost effective.

And TIME effective. Even if you have tons of money, this would be a waste of your TIME. If you have spare time, then go wheeling. You need to learn your truck more than you need to whip up one-off custom gizmos.
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Old 02-12-2010, 12:32 AM   #12 (permalink)
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Quote:
Originally Posted by 600dollarXJ View Post
I thought dana 30 ring and pinion failures were pretty common
They are. Talk about polishing a turd!


This is a 44 vs a 30 ring gear. Wee bit bigger.


edit: the ring gear is about 15/16'' wide on the 30 and 1-3/16'' wide on the 44.

Last edited by Starboard M; 02-12-2010 at 12:34 AM.
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Old 02-12-2010, 06:55 AM   #13 (permalink)
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If yo look through Billavista's tech articles, he built up a 30.

you can make it more durable, but ultimately for most people the skinny pedal will kill it.
Although URJB on here has been running a 30 front on his jeep with 37's for years. He just knows how to drive, and knows the limits.
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Old 02-12-2010, 07:00 AM   #14 (permalink)
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And TIME effective. Even if you have tons of money, this would be a waste of your TIME. If you have spare time, then go wheeling. You need to learn your truck more than you need to whip up one-off custom gizmos.
wise advice.

i have lots of time but limited funds.
i just like to play in my shop.
i have 3 jeeps
2 5.0 mustangs
a 85 z28 t top
1 austin mini
and a kx250
not to mention 1300sqft of truck parts from scrap tear downs
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Old 02-12-2010, 10:12 AM   #15 (permalink)
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So what you're saying is you already have your mind made up and you just wanted us to agree with your plans to make a completely useless axle? Good luck with your axle endevors, dont say we didnt tell you it was a bad idea.
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Old 02-12-2010, 10:45 AM   #16 (permalink)
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Looks like you need to check out this thread in jeep hardcore https://www.pirate4x4.com/forum/showt...a+30+ring+gear

There was a ton of guys who did the exact same thing to there ring gears with 35"-33" tires. I was one of them. Stock dana 30 busted the ring gear just like the picture above with 33"s. Im sure you can build that axle if you really wanted to. But it will still be a dana 30. BTW I would rather bust axle shafts then bust R&P's
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Last edited by COPPERHEAD42; 02-12-2010 at 10:46 AM.
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Old 02-12-2010, 10:53 AM   #17 (permalink)
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Old 02-12-2010, 12:24 PM   #18 (permalink)
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Originally Posted by mud bros.1 View Post
i have broken plenty of shafts and joints but never damaged the ring gear or pinion(aside from bearing abuse)
i guess im just lucky
Sounds to me like the shafts have just been your "fuse" so far, protecting the ring and pinion. Upgrade your shafts and guess what the next weakest link will be...
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Old 02-12-2010, 01:51 PM   #19 (permalink)
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Quote:
Originally Posted by mud bros.1 View Post
i have a d44 hp from a 79 ford i was going to use but the question of ring gear strength has passed by my head a few times as i have broken plenty of shafts and joints but never damaged the ring gear or pinion(aside from bearing abuse)
i guess im just lucky

i was just curious to see if anyone has any real load limits for the ring gear?

i was thinking of running 33s with small diffs for clearance.

like the title says...............
a dumb question

i was also curious to see if anyone has spent some time making a d30 stronger
mabey there just to embarrassed to admit it.


i guess a 44 60 hybrid is the route to go on the cheap
If you want to polish a 44... https://www.pirate4x4.com/forum/showthread.php?t=460434
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