5.9L Rotary Performance Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with Rotary Injection Pumps Related To Performance And Longevity

rear ends

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Old 05-21-2012, 09:25 PM
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I am getting ready to start my drag truck build. its gonna be a tubbed 2wd short bed. i was just have no idea as to what rear end what will handle the power. 800-1000ish. i have a chance to buy a ford 9 inch really cheap but has already been narrowed and has wheels with 18" s licks on it. will a 9 inch hold up or be built to hold up. or would i just be better to start with my dana and build it.
 
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Old 05-22-2012, 05:43 AM
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My opinion would be to use what u got or a 14 bolt gm but I'm no racer so take it for what it's worth.
 
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Old 05-22-2012, 07:54 AM
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A good 9 inch ought to hold up pretty good. That kind of power, about anything is gonna require maintainance, unless you go real heavy duty, which doesn't necessarily fit the drag racer theme. That's just my $.02
 
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Old 05-22-2012, 04:58 PM
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thanks for the input. can my dana be made stronger than a 9 in
 
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Old 05-23-2012, 03:49 AM
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That's a 60, right? I think their about equal, comes down to how you build 'em, brand loyalties, and price. You already have the Dana, but it'll have to be modded, and I think quality Dana parts are more expensive than comparable 9 inch parts. You might be able to find better deals than I've seen, good luck either way
 
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Old 05-23-2012, 05:25 PM
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i think it is a 70. its a 1 ton truck
 
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Old 05-23-2012, 08:06 PM
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If its a factory diesel its a 70u
 
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Old 05-23-2012, 08:25 PM
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my opinion if u could get the 9inch at a good deal that whould be my choice parts cheaper and more avalible also easier to work on
 
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Old 05-23-2012, 09:17 PM
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SRW Dana 80 with a spool and a good sturdy differential cover; I've heard the axle shafts in the 70's are it's weak link and aftermarket is expensive compared to 80's that can handle it right out of the box. Obviously you're going to want to get your gearing dialed in and with any luck you might be able to find an axle with the desired gearing


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Old 05-29-2012, 08:38 AM
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i think im going to go a head and get the 9 in since it has already been narrowed and has disk brakes on it. i think i can get it for next to nothing anyways. if i blow it up then i will build my 70 or try to find and 80. thanks for the help
 
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