dana 70 help

bigguy

Well-Known Member
Joined
Jul 11, 2009
Location
marion nc
A friend has a Dana 70 in his truck. Street use only. It keeps leaking at the seal. He has put four new seals in it, and the last time even changed the yoke. It is still leaking. Vent tube is clear, not stopped up. Pinion bearing looks good.
Any Ideas?
 
Let me translate:

I have a dana 70, only used on the street running 285(70/16?) tires. I gone through 4 pinion seals, I have even tried a new spicer yoke, and a spicer brand pinion seal in there this last time. The vent is working, the pinion bearings are good, no slack. Any ideas?

Now maybe more people will be able to help.
 
Is it leaking around the seal to the pinion shaft or at the interface of the axle housing? (in other words, on the ID or OD of the seal) Did he clean out the groove where the seal sits in the housing when he installed the seals? And if he cleaned out the groove, did he replace the diff fluid?
 
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