Rear diff cover

[03wr250f]

https://www.amazon.com/Ford-8C3Z-40...r=1-1&keywords=ford+finned+differential+cover
those covers are pretty spendy at $55 for a aluminum finned cover lol. Thats why i went to one. better heat dissipation from aluminum and fins over stock, and way cheaper than a mag hytech, but then again I dont pull much so stock did just fine, but why not upgrade?

sorry @catbird7 I am with macrobb on this when sythetic leaks It tends to be showing where old seals are about to leak because the synthetic and also usually lighter weight oil is able to seap out where the thicker oil doesnt. But there is nothing wrong with going back to something that doesnt leak provided it meets all of the axles lube requirements!

 

[fyrfghter]

Lubelocker gaskets are awesome for diff’s if you need to maintenance or swap fluid regularly. You re-use the gasket and no sticky mess


Sent from my iPhone using Tapatalk

 

[catbird7]

https://www.amazon.com/Ford-8C3Z-40...r=1-1&keywords=ford+finned+differential+cover
those covers are pretty spendy at $55 for a aluminum finned cover lol. Thats why i went to one. better heat dissipation from aluminum and fins over stock, and way cheaper than a mag hytech, but then again I dont pull much so stock did just fine, but why not upgrade?

sorry @catbird7 I am with macrobb on this when sythetic leaks It tends to be showing where old seals are about to leak because the synthetic and also usually lighter weight oil is able to seap out where the thicker oil doesnt. But there is nothing wrong with going back to something that doesnt leak provided it meets all of the axles lube requirements!

I don't disagree, synthetic lubes have clearly been proven superior. Simply relating my experience using them. It's probably good advice to replace old gaskets & seals when changing to synthetics in an effort to avoid potential leaks...

 

[chris142]

I don't see a reason to use a 80w-140wt oil unless your always pulling a heavy load. 80w90 will be fine and give better mpg.

 

[03wr250f]

except for the fact that the sterling 10.25 specs 85-140, and sterling 10.5 specs 75-140 synthetic. I would think that 80-90 is ******* them because it does not give the proper lubrication I doubt you would see an increase in mpg with 80-90 But I could be wrong. I love to learn!

 

[03wr250f]

Lubelocker gaskets are awesome for diff’s if you need to maintenance or swap fluid regularly. You re-use the gasket and no sticky mess


Sent from my iPhone using Tapatalk

Yea unless amazon sends the wrong one. I was excited to try one, I rtv'd it and moved on though!

 

[catbird7]

What did that cover run you and do you have a part number? I looked and the cheap ones on Summit are $100

Ford pn# for the aluminum cover is 8C3Z4033A. I paid $75.93, purchase date was 1-6-14.

 

[catbird7]

Just check amazon has that cover listed @ $59 bucks!

 

[icanfixall]

Some years back on this very forum I was reading about how easy it was to change fluid in the differential. This member filled a plastic bag with the fluid and placed it in the gears. then installed the cover. The spinning gears break open the bag and then the oil coats everything as normal. The plastic bag will do no harm to any gears or seals...So was the claim... . I'm not a follower of the bag idea but kind of still wonder if it works or not. One would think pieces of the bag could get into areas that may block oil like axle tubes. Still wonder...

 

[Hydro-idi]

Some years back on this very forum I was reading about how easy it was to change fluid in the differential. This member filled a plastic bag with the fluid and placed it in the gears. then installed the cover. The spinning gears break open the bag and then the oil coats everything as normal. The plastic bag will do no harm to any gears or seals...So was the claim... . I'm not a follower of the bag idea but kind of still wonder if it works or not. One would think pieces of the bag could get into areas that may block oil like axle tubes. Still wonder...

Sounds like a good idea, especially for an engine build haha

 

[chris142]

except for the fact that the sterling 10.25 specs 85-140, and sterling 10.5 specs 75-140 synthetic. I would think that 80-90 is ******* them because it does not give the proper lubrication I doubt you would see an increase in mpg with 80-90 But I could be wrong. I love to learn!

My 87 specs 80w90 in both the owners manual and alldata.

 

[chris142]

You must be registered for see images attach

 

[fyrfghter]

Yea unless amazon sends the wrong one. I was excited to try one, I rtv'd it and moved on though!

That’s a bummer, I have a RuffStuff diff cover in the front and it was just an add on to get the lube locker. My rear is rtv if I remember right. At some point I’ll get another diff cover for it and go lubelocker


Sent from my iPhone using Tapatalk

 

[laserjock]

Personally I’m not a fan of royal purple. I used to run it in difs. I did some reading on it in at least one oil viscosity study (no there’s no way I can find it now) and it didn’t even come close to maintaining viscosity. Way too thin at temp. That may be why you were seeing leaks. Mobil 1 was right near the top of the heap so that’s what I’ve been running. No leaks that I can see.

For the record, I run that ford diff cover with a gasket and rtv on both sides of the gasket. Just the way I was taught. Never had one leak though. I tend to use permeated ultrablack. It’s good for about anything.

 

[chillman88]

Does that Ford cover look thick enough to tap for a drain plug?

I could always get a chunk welded on at work but it'd be really nice to be able to drain it without removing it.