Important

those rims are so flatbiller it's not even funny!
 
So the Haynes manual says for the rear wheel bearings on my F350 dually (full float axle) that I should pack them on the install full of grease (like front wheel bearings and trailer wheel bearings). Then says put 1 oz of gear oil inside the hub. Then put it all back together.

Now the gear oil from the axle will eventually get out to the hub bearings and wash them out. Won't the grease contaminate the gear oil?

This has been the longest project evah...

mac 'should've been done with both sides today' gyvr
 
So you borrow money and you don't pay it back?

Yet another reason why we're trillions of dollars in debt. What's awesome about not owning up to your end of a loan?
 
So the Haynes manual says for the rear wheel bearings on my F350 dually (full float axle) that I should pack them on the install full of grease (like front wheel bearings and trailer wheel bearings). Then says put 1 oz of gear oil inside the hub. Then put it all back together.

Now the gear oil from the axle will eventually get out to the hub bearings and wash them out. Won't the grease contaminate the gear oil?

This has been the longest project evah...

mac 'should've been done with both sides today' gyvr

It's all petroleum in the end. The grease ensures that you don't end up with a dry bearing after installation and a wheel passing you on the highway.
 
I'd suspect that the grease is acting as assembly lube there, but I'm not really an expert (at all) on axles or bearings.
 
It's all petroleum in the end. The grease ensures that you don't end up with a dry bearing after installation and a wheel passing you on the highway.

I'm replacing them cause somehow they were getting hot and starting to make some noise...I could hear it as I was passing semi's and got next to them.

The rear spindle shows where there was a little bit of heat build up...doesn't seems to be too awful tho, think I got to them before it got ugly.

I was just worried about contaminating that expensive as crap ford diff fluid.

mac 'projects like these make me glad to live within 10 mins of about 15 parts stores' gyvr
 
I'm replacing them cause somehow they were getting hot and starting to make some noise...I could hear it as I was passing semi's and got next to them.

The rear spindle shows where there was a little bit of heat build up...doesn't seems to be too awful tho, think I got to them before it got ugly.

I was just worried about contaminating that expensive as crap ford diff fluid.

mac 'projects like these make me glad to live within 10 mins of about 15 parts stores' gyvr

The ratio of grease that will be introduced into the differential fluid is so small it doesn't matter. I thought that full float axles were like front axles, with seals at the carrier that prevented the fluid from traveling down the tubes. The grease may be the primary source of lubrication.

Those bearings shouldn't create heat unless they've been starved of lubrication or the preload was set too high. Did you have diff fluid in the tubes when you took it apart?
 
Also, I'd check the ford FSM, never, ever believe the Haynes manual.

- Ken 'apparently can't even get distributor rotation direction right for a 4.0' Stein
 
Yes there was gear oil in the hubs.

The bearings were not covered in grease, just had gear oil.

I'm not sure why there was an issue. I'm going to make sure that I top the diff off when I'm done. I have drained and refilled and put the correct amount in on this axle a year ago after I purchased the truck.

The truck does has 122k on it and has been run hard and put away wet more than once and I'm sure by the previous owner who put 111k on it the truck in 18 months.

mac 'prelubed' gyvr
 
Also, I'd check the ford FSM, never, ever believe the Haynes manual.

- Ken 'apparently can't even get distributor rotation direction right for a 4.0' Stein

I don't have an FSM to check.

mac 'barely could find a haynes manual' gyvr
 
I don't have an FSM to check.

mac 'barely could find a haynes manual' gyvr

Online Ford Service Information (same as dealership):

http://www.helminc.com/helm/Result....&Category=&Keyword=&Module=&selected_media=ES

$11 for 3 days, $20 for a month, $110 for a year

$20 for a month makes sense if you're tackling something big. Most of the manufacturers go through Helm for their dealership service networks (or so I've read.)

I couldn't remember if yours was an '08.
 
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