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98.5-02 Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect..NO ADVERTISING .

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Old 03-24-2011, 09:18 PM   #1 (permalink)
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dana 80 vs dana 70

Anyone know the difference in the overall weight of the Dana 80 vs the Dana 70? I am looking into putting in an 80 but I don't want to increase the weight of the truck to much.
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Old 03-24-2011, 09:24 PM   #2 (permalink)
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With as heavy as these trucks are, the extra weight will be negligible. You trying to keep weight down for racing or what?
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Old 03-24-2011, 09:31 PM   #3 (permalink)
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Similar question, but with regards to strength... I currently have a Dana 70. Will it be worth the effort to find and put in a Dana 80?

At what point (weight, power/torque, etc.) will I break a Dana 70?
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Old 03-24-2011, 09:33 PM   #4 (permalink)
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I've made a few trips down the track. I have a choice to rebuild a trashed 70 or replace it with an 80 that has 200000 miles on it. The last trip cost me a new t case a rebuilt shaft and now a diff. I guess if you aint breakin something you aint playing hard enough!!
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Old 03-24-2011, 09:36 PM   #5 (permalink)
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Similar question, but with regards to strength... I currently have a Dana 70. Will it be worth the effort to find and put in a Dana 80?

At what point (weight, power/torque, etc.) will I break a Dana 70?
I am pushing 2000 ftlbs and I think I wheel hopped and everything came apart. I shattered the pinion in the diff. Everyone I'm talking to is saying go with an 80 but I don't want to increase the overall weight of the truck.
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Old 03-25-2011, 12:21 AM   #6 (permalink)
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80 is much lighter than a 70, cause you got to carry spare 70 assy to get yourself home from playing.
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Old 03-25-2011, 12:45 AM   #7 (permalink)
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80 is much lighter than a 70, cause you got to carry spare 70 assy to get yourself home from playing.
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Old 03-25-2011, 01:56 AM   #8 (permalink)
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I've made a few trips down the track. I have a choice to rebuild a trashed 70 or replace it with an 80 that has 200000 miles on it. The last trip cost me a new t case a rebuilt shaft and now a diff. I guess if you aint breakin something you aint playing hard enough!!
I wouldnt worry about the mileage on that 80. I just took mine apart to put in an ARB locker and everything looked new and mine had 212,000 miles on it.
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