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Discussion Starter #1
Wich is a better rear end a GM corporate 14 bolt ff or a rear end out of a 65 3/4 ton Chevy?? I believe its an Eaton, but I'm not positive.

Wich one is stronger and will hold up more abuse. Are any lockers/posi's available for the Eaton rear end. And can brake's and other parts still be found for it. TIA

Az Scout <IMG SRC="smilies/beer.gif" border="0"> <IMG SRC="smilies/beer.gif" border="0">
 

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Az scout the eaton is a good rear but its onlt 17 slpines , the detroit locker is the only option and they dont make them anymore so you would hav e to buy a used one, and the choice of r&p is only 2 ratios. The 14 bolt has a plenthora of R&P parts availible although it has a smaller ring gear than the eaton, it has way more splines , but only the detroit is available for it as well. For ease id go with the 14 but it would be nice to have the drop out third member two? <IMG SRC="smilies/roxy.gif" border="0">
 

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Originally posted by techguru73:
<STRONG>Az scout the eaton is a good rear but its onlt 17 slpines , the detroit locker is the only option and they dont make them anymore so you would hav e to buy a used one, and the choice of r&p is only 2 ratios. The 14 bolt has a plenthora of R&P parts availible although it has a smaller ring gear than the eaton, it has way more splines , but only the detroit is available for it as well. For ease id go with the 14 but it would be nice to have the drop out third member two? <IMG SRC="smilies/roxy.gif" border="0"></STRONG>
The Eaton is the way to go! There are 4 ratio's (not 2). Most come stock with 5.14's but 4.57 was also made. Randy's R&P stocks 3.90 and 4.10 for them. The detroit was an option from '69 to '72. You can swap out the Eaton inner crap with 14 bolt stuff if you can't find one with a Detroit. They have the largest R&P - 12.25" and the largest axles - 1.55". The standard ones are rated at 11K lbs, but the ones with the pinion load bolt are rated at 17K lbs <IMG SRC="smilies/eek.gif" border="0"> <IMG SRC="smilies/eek.gif" border="0"> !!! They are easy to swap to discs too - I got some 3/4 ton caliper brackets, then just got 3/4 ton front 4x4 rotors, calipers, and pads. They are the bomb!!!
 

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Yep I aqgree with you that the eaton is a stronger axle but only in certain areas , the 2 R&P ratios that I was referring to are the ones that are availble to be bought today your right there are 4 total. The 14 bolt does have the smaller ring gear as I stated earlier. The reason I claim the 14 bolt is only for parts availibility only. I really like neither of these axles. If I were chosing any axle in this size category I'd go with the dana 80! <IMG SRC="smilies/biggrin.gif" border="0"> <IMG SRC="smilies/biggrin.gif" border="0"> <IMG SRC="smilies/biggrin.gif" border="0">
 

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Originally posted by techguru73:
<STRONG>Yep I aqgree with you that the eaton is a stronger axle but only in certain areas , the 2 R&P ratios that I was referring to are the ones that are availble to be bought today your right there are 4 total. The 14 bolt does have the smaller ring gear as I stated earlier. The reason I claim the 14 bolt is only for parts availibility only. I really like neither of these axles. If I were chosing any axle in this size category I'd go with the dana 80! <IMG SRC="smilies/biggrin.gif" border="0"> <IMG SRC="smilies/biggrin.gif" border="0"> <IMG SRC="smilies/biggrin.gif" border="0"></STRONG>
LOL! My Eaton was only $100 - so I grabbed it. I'm going to weld it anyway. I really like the drop out 3rd.
 

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Discussion Starter #7
The 14 bolt has a plenthora of R&P parts availible although it has a smaller ring gear than the eaton, it has way more splines , but only the detroit is available for it as well. For ease id go with the 14 but it would be nice to have the drop out third member two? <IMG SRC="smilies/roxy.gif" border="0">[/QB]
Don't they make a Lock-right for the 14 bolt?

Let's mix things up a bit more, how does a Dana 70 compare to the Eaton and 14 bolt. And how much wider is a 70 from a dualy truck as opposed to a single wheel and are ARB"s available for the 70 or 14 bolt?
 

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Az scout a dana 70 is almost like a best of the two type axle . I will admit that I am partial to dana axles before I attept to answer this question so here goes. The dana 70 comes stock with 35 spline axles. It has a 10.5 inch rig gear , so does the 14 bolt and the eaton is referred to as the 14" drop out although its only 12.5. the dana 70 has more splines than the eaton or the 14 bolt. Of the three the dana will be the hardest to set up the ring and pinion , then the 14 bolt with spanner nuts, and then the eaton is the easiest due to it having a third member. the 70 and 14 bolt have 1/2" tubes that can be anywhere from 3.5" to over 4" o.d. the eaton is similar to a ford oe toyota houing stamped steel.As the lock right goes that is the detroit your talking about it goes inside the carrier like a lockright just uses the stock 14 bolt carrier.Its the only locker thats availible for the 14 bolt but the 70 has most every locker availible for it including the ARB.The single wheel rears are going to be around 69" as opposed to the dually @ 64" thanks I hope this help ya chris <IMG SRC="smilies/biggrin.gif" border="0"> <IMG SRC="smilies/biggrin.gif" border="0"> <IMG SRC="smilies/biggrin.gif" border="0">
 

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Discussion Starter #9
Thanks for all the info. <IMG SRC="smilies/biggrin.gif" border="0"> I thought that the dually 70 rear was wider than the single wheel. Guess I was wrong. Someone told me that you could swap out the carrier in a 14 bolt with the 70, is that BS <IMG SRC="smilies/question.gif" border="0"> since the spliness are different? I really want an ARB so I can trun it off when I'm on the street.

My buddy has all these rear ends laying around his lot. Now I just have to make a decision. <IMG SRC="smilies/idea.gif" border="0"> Lastly wich has more clearence the 70 or 14 bolt, or are they about the same since there so damn big.
 

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Im in Prescott, can I have the one that you dont pick please?? Just curious if you would be interested, its for my new project.

Thanks AZ Scout, hwlp out a fellow AZ wheeler. <IMG SRC="smilies/biggrin.gif" border="0"> <IMG SRC="smilies/biggrin.gif" border="0"> <IMG SRC="smilies/biggrin.gif" border="0"> <IMG SRC="smilies/biggrin.gif" border="0">
 

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Discussion Starter #11
Originally posted by Fullsize Toy:
<STRONG>Im in Prescott, can I have the one that you dont pick please?? Just curious if you would be interested, its for my new project.

Thanks AZ Scout, hwlp out a fellow AZ wheeler. <IMG SRC="smilies/biggrin.gif" border="0"> <IMG SRC="smilies/biggrin.gif" border="0"> <IMG SRC="smilies/biggrin.gif" border="0"> <IMG SRC="smilies/biggrin.gif" border="0"></STRONG>
Theyre not mine, theyre my buddys. I bought the 14 bolt from him and he said that if I wanted a different rear end that he had he would just trade me outright. He has LOTS of them for sale pretty cheap. E-mail me if youre interested. I can get you the list of what rear ends and what ratios hes got. I believe he has about 4or5 70's i Eaton and maybe 2 14 bolts.

BTW, where do you wheel at?

<IMG SRC="smilies/biggrin.gif" border="0"> <IMG SRC="smilies/wink.gif" border="0"> <IMG SRC="smilies/biggrin.gif" border="0"> <IMG SRC="smilies/wink.gif" border="0">
 

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if you care about weight, don't get the 14 bolt, those damn things weight about 500lbs, plus the diff hangs down very far and scrapes stuff on my friends K5 with 37s that my Chrys 8 1/4 with 33s didn't.
 

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Discussion Starter #13
Originally posted by kegmaster:
<STRONG>if you care about weight, don't get the 14 bolt, those damn things weight about 500lbs, plus the diff hangs down very far and scrapes stuff on my friends K5 with 37s that my Chrys 8 1/4 with 33s didn't.</STRONG>
Yeah they are damn heavy. It was a PITA getting that thing outa my truck. Now I might have to move it back to where I picked it up from and swap it for a 70. I don't really care about adding weight, my Scout is so heavy already that more weight won't really matter.
<IMG SRC="smilies/beer.gif" border="0"> <IMG SRC="smilies/biggrin.gif" border="0"> <IMG SRC="smilies/beer.gif" border="0">
 

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well i am a chevy guy so i personally like both the eaton and 14 bolt but in my wheelers i just about always use the eatons cause i like the ease of the drop out third members,it has better ground clearances than a 14 bolt,came factory with a detroit(no-spin)and 5.14 gears and also the fact that it has a 1 piece housing (no pressed in tubes) and not to mention it bolts in my 72 trucks including my burb with absolutly no modification ,basically for me what is not to like. I also could not keep a detroit frome breaking in my burb in front so am not crazy about a detroit in a dana product in rear,my rear tires do hook up pretty good. Just my .02
 

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update: i broke 2 eaton axles and 1 side of the detroit all at once. ring and pinion are fine though! I then used a detroit from a 14 bolt(brand new) and 14 bolt axles and the detroit starting f****ing up pretty bad and then it was fine so i am gonna probally go to a spool or welded cause at least then when there is some noise coming from back there and 1 wheel is not spinning i will know that the shit is broke!
 

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MYTZUK said:
Did you put the 14 bolt Detroit and axles in your Eaton? Did you have to do any modifications to get them to fit?
No, it's a straight swap but you need to make sure you have the correct length 14 bolt shafts. I live in TN and like BRECTOR there are MANY of these on the trails, it's a much preferred axle because of the strength and ground clearance. I got a 14, but I got a grinder too!:flipoff2:
 

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Jayrockn7 said:

No, it's a straight swap but you need to make sure you have the correct length 14 bolt shafts.
Ok this is the second time I've read about this this week (funny how things come in waves)....is this for real? The 14 FF Detroit drops in to the case with NO modifications? So all you have to do is cut down some 14 bolt shafts? Why haven't more people been doing this (or maybe they have and just not telling me? :D )

Another Q: my 14 FF shafts taper down next to the splines....is that going to affect cutting them down to go in an Eaton? Or is it less than the length of the splines?
 

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kegmaster said:
if you care about weight, don't get the 14 bolt, those damn things weight about 500lbs, plus the diff hangs down very far and scrapes stuff on my friends K5 with 37s that my Chrys 8 1/4 with 33s didn't.

Once you dump the monsterouse drum brakes, for discs you lose about 80lbs per side.
The 14 bolt housing can be shaved down, to have more clearance than a D60.

The 14 bolt is cheap, and extremely strong.
And its a rear axle, so weld it up or put a $325 Detroit in it and be done.
 

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H8monday said:



Once you dump the monsterouse drum brakes, for discs you lose about 80lbs per side.
The 14 bolt housing can be shaved down, to have more clearance than a D60.

The 14 bolt is cheap, and extremely strong.
And its a rear axle, so weld it up or put a $325 Detroit in it and be done.
That is what I am doing.
I really don't want to count on forty year old, coarse spline shafts.
While the 14B shafts are marginally smaller, they benefit from later technology in production, design, and metallurgy.
 
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