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Old 03-10-2009, 10:22 PM   #1 (permalink)
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Dana 80 pinion nut torque???

I picked up a dana 80 single wheel rear end & replaced the pinion seal, what is the proper torque for the dana 80 pinion nut??

Thanks
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Old 03-10-2009, 10:31 PM   #2 (permalink)
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450-500ft/lb minimum....

It takes a bear to properly torque the pinion nuts and crush sleeves are SO MUCH FUN!!!

Just rebuilt the 10.25" in the ford on monday, that thing was a beast to torque, had to put a 5' snipe on and it was still a pig to get it to crush the sleeve!

Problem with re-using an old crush sleeve is, you want that nut as tight as possible, but without crushing the crush sleeve any more or you risk putting too much preload on the pinion bearings.

Dodge Ram Dana 80 Axle Specifications
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Old 03-10-2009, 10:39 PM   #3 (permalink)
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thanks YKDave !!!
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Old 03-11-2009, 12:50 AM   #4 (permalink)
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No crush sleeve on a Dana 80.
All preload is done with shims.

Brad
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Old 03-11-2009, 07:24 AM   #5 (permalink)
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Brad, does that make it easier when reinstalling the nut, as far as torque setting??? Can I hit it w/ a impact gun w/ red lock tight on the nut & be good????
Thanks
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Old 03-11-2009, 10:44 AM   #6 (permalink)
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much easier then!

Wasnt sure if the D80 had a crush sleeve or not. without one, you can torque up the nut as much as you want without fear of putting too much preload on the bearings
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Old 03-11-2009, 12:26 PM   #7 (permalink)
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As stated above it can be tighten as much a possible.
What I do when replacing a seal is make a mark on the pinion and nut before removing.
Then when tightening it back up, go just barely past that mark.
450 - 500 ft. lbs. is hard to get.
And I would use the red Locktite on a used nut.

Brad
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Old 03-11-2009, 09:21 PM   #8 (permalink)
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thanks guys.

I replaced the seal & needed a speedy sleeve for the yoke, reinstalled nut w/ locktite red & used a 3/4" IR impact-claims to be a 650 ft. lbs. gun

Thanks again
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Old 10-18-2009, 11:45 PM   #9 (permalink)
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what is the difference of the yoke on a 80 and 70 any one know the part number for a yoke on a dana 80 srw ?
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Old 01-09-2011, 02:04 PM   #10 (permalink)
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Quote:
Originally Posted by B KIRK View Post
No crush sleeve on a Dana 80.
All preload is done with shims.

Brad
Holly digging up an old thread...but I have a quick point to add to this as well as a little more info.

The statement quoted is pure false. Some Dana 80's came with or without crush sleeves, lets just make that clear, this knowledge is from over 40 years of axle building knowledge in the offroad industry. Second point and bit of helpful info I would like to toss out there if someone actually searches this forum first is this. This goes for all the rear axles in your cummins trucks. When you do pull the yolk off the axle to replace the pinion seal take a good look at the machined surface that the seal rides on. Make sure there is no groove or if so a very very small groove that the seal made over time. If it is too large you can either do one or both of these things to save from buying a new yolk which will run you in the range of 150 bucks. A: the easy one is to put a shim or two behind the yolk to space it out and make the seal ride on a different spot of the yolk if that makes sense your just moving the sealing surface away from that groove. B: you can put the yolk in a lathe and turn it down ever so slightly to get rid of that groove. Make note though to not make the surface a pure polished surface as the seal wont seal well.

Hope this added something to this and for future D80 pinion installers.
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