Dana 60 and 70 misconceptions
- Joseph Baz
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Cheers,Joe
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- Outback Jack
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I have had heard of several diffs that have had crown wheel bolts working loose and causing further damage.
Also the carrier bearing cap bolts have a habit of coming a bit loose. I think in the service manual it states to retorque them at 50k for memory.
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- Holmz
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Joseph Baz wrote: Contrary to common beliefs in 07 I spent 6 months in the US during that time I visited some manufacturers and done some training short courses,From the Dana tech Dpt own words" the diffs don't have drain plugs Not because the crown wheel bolts work out loose" (which they don't have any data to substantiate) but the reason is that if you have a Power Lok LSD the clutch discs wear and in order to extend the life of the pinion and carrier bearings you do need to wash out all the fine metal particles from the worn parts,I have been doing Dana diffs well before OKA come in the scene and if the crown wheel bolts are dry and clean and Loctited in place they will not work out loose but you will have to consider the fact that your OKA may have been tempered with over the years also If you come across loose bolts tose them clean the threads with an evaporating cleaner like brake and parts cleaner and fit new bolts Loctite them in and re torque,after that it can only be happy travels
Cheers,Joe
Thanks Joe.
What preload should the diff be under, ralative the diff spreader clearance?
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- Dean and Kaye Howells
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Deano
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- Joseph Baz
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I don't take any notice of the Spreader clearance apart for not spreading more than.010" to .014 max I guide myself totally by measurements,once you determine the correct pinion height (3.125" for D60 and 3.5" for D70 +- the engravings on the pinion head) determine the shims required for the ring gear side and you can still maintain a ring gear to pinion backlash of .004'' for a new set up (can go to .006" for an old set up) you then preload the other side (side facing ring gear teeth) to .015" and always making sure that you retain pinion ring gear backlash and setting up bearings are definitely needed
Hope didn't confuse things too much
Cheers,Joe
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- Joseph Baz
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Cheers,Joe
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- Holmz
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Joseph Baz wrote: Lobo,bolts don't have habits,just poor maintenance and poor fitting procedures,I have done diffs that have clocked 300 and 400K and nothing worked out loose,I do polish the back of the ring gear and the carrier before fitting and torqueing
Cheers,Joe
Joe, what does the polishing do?
Thanks Joe - I see it now
Thanks,
Randal
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- Joseph Baz
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Cheers,Joe
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