Thinking
Senior Member
Joined: Feb 2021
Posts: 678
Likes: 54
> Gasket surface of rear diff cover should be super clean.
That's the main concern.
Uh, ok. A lil premature, to me.
NEVER seen a silverized oil.
Din't think I had read of one w graphite.
Maybe.. molybdomen?
Guys? Silverized gear oil?
You gotta do it your way.
I and "my team," (when applicable,) always seem to be behind all others. Prep, prep, prep.
Then we calmly, won the non-race, and, with a better quality of work. 30 minutes, a lil tight for me. 2 hours? Maybe I'd take it slow. Examine my trailer connector while things drain. Watch the oil drip, drip through the filter. I'm retired. An hour can be adequate. Can be. YMMV. I take things, slower. Call it Virgoistic. Californian. Retired. PTSD. You, go be you. Until that doesn't work. As a non-pro, it's good to take things slowly. It helps avoid, mistakes. Oversights. IMHO.
That's the main concern.
Uh, ok. A lil premature, to me.
NEVER seen a silverized oil.
Din't think I had read of one w graphite.
Maybe.. molybdomen?
Guys? Silverized gear oil?
You gotta do it your way.
I and "my team," (when applicable,) always seem to be behind all others. Prep, prep, prep.
Then we calmly, won the non-race, and, with a better quality of work. 30 minutes, a lil tight for me. 2 hours? Maybe I'd take it slow. Examine my trailer connector while things drain. Watch the oil drip, drip through the filter. I'm retired. An hour can be adequate. Can be. YMMV. I take things, slower. Call it Virgoistic. Californian. Retired. PTSD. You, go be you. Until that doesn't work. As a non-pro, it's good to take things slowly. It helps avoid, mistakes. Oversights. IMHO.
Is a plastic ice scraper good enough ?
You can't really use a metal scraper on the rear diff case surface, it will scratch.
what other tools should I have on hand for this job ?
Senior Member
Joined: Feb 2021
Posts: 678
Likes: 54
More so a couple years ago on a random spot check.
Senior Member
Joined: Oct 2017
Posts: 1,728
Likes: 440
From: CA near Frisco
The high oil level MIGHT have carried a few thousand tiny particles to the axle bearings. No matter. Change one, is enough prep work that changing all, is not much more, with the exception of the yoke/piñion seal, (due to the crush washer.)
The breather is in your 20+$ chilton/haynes book or online... atop the axle, sorta central in mine... IIRC. Google it, too. We are supposed to help, when the books, stop, or unusual things, things not in the common books.
Like, I want shop manuals, but V few have those hundred $ books. After looking, you will have fewer, but better, more interesting questions... but more, and much better answers from here.
Last edited by BillSF9c; May 1, 2022 at 12:58 AM.
Senior Member
Joined: Feb 2021
Posts: 678
Likes: 54
looked on line for breather hole on rear diff for specific year/make of F150....
As far as breather holes...
I see a generic image on a google search, it's not vehicle specific because the one's I saw were on a bigger rear diff, not an 8.8".
Gear oil can reach the axle bearings ?
There was not enough time of driving. I maybe drove the truck 3 miles max and under 30 mph, until I drained the extra gear oil out.
As far as breather holes...
I see a generic image on a google search, it's not vehicle specific because the one's I saw were on a bigger rear diff, not an 8.8".
Gear oil can reach the axle bearings ?
There was not enough time of driving. I maybe drove the truck 3 miles max and under 30 mph, until I drained the extra gear oil out.
Senior Member
Joined: Oct 2017
Posts: 1,728
Likes: 440
From: CA near Frisco
You know hiw coolant goes through the radiator to cool the engine? And w an overheating car, you turn the heater on to cool the engine? The coolant goes two places?
So, yes. The dif oil IS also the bearing oil.
But a very low level as bearings do not want much oil.
Probably not much reached the bearings.
For MY money... and TIME, if that oil does not come out, entirely uncontaminated of metal, you must replace every bearing and seal, and the crush washer, (and mind the gear mesh w yellow indicator paint.)
Others might buy a junked rear axle assembly. If a 2WD, you get a chance to change to an economical rear end or high acceleration rig.
Which then you want to do the same thing to anyway, cuz IT has old bearings and seals. YMMV.
But this is a great opportunity to earn, perhaps your first, merit badge. It is just technical enough for some basic bragging rights. You CAN do this. Utube shows all. This will teach more, than what you learn about it, specifically.
So, yes. The dif oil IS also the bearing oil.
But a very low level as bearings do not want much oil.
Probably not much reached the bearings.
For MY money... and TIME, if that oil does not come out, entirely uncontaminated of metal, you must replace every bearing and seal, and the crush washer, (and mind the gear mesh w yellow indicator paint.)
Others might buy a junked rear axle assembly. If a 2WD, you get a chance to change to an economical rear end or high acceleration rig.
Which then you want to do the same thing to anyway, cuz IT has old bearings and seals. YMMV.
But this is a great opportunity to earn, perhaps your first, merit badge. It is just technical enough for some basic bragging rights. You CAN do this. Utube shows all. This will teach more, than what you learn about it, specifically.
Senior Member
Joined: Oct 2017
Posts: 1,728
Likes: 440
From: CA near Frisco
You know hiw coolant goes through the radiator to cool the engine? And w an overheating car, you turn the heater on to cool the engine? The coolant goes two places?
So, yes. The dif oil IS also the bearing oil.
But a very low level as bearings do not want much oil.
Probably not much reached the bearings.
For MY money... and TIME, if that oil does not come out, entirely uncontaminated of metal, you must replace every bearing and seal, and the crush washer, (and mind the gear mesh w yellow indicator paint.)
Others might buy a junked rear axle assembly. If a 2WD, you get a chance to change to an economical rear end or high acceleration rig.
Which then you want to do the same thing to anyway, cuz IT has old bearings and seals. YMMV.
But this is a great opportunity to earn, perhaps your first, merit badge. It is just technical enough for some basic bragging rights. You CAN do this. Utube shows all. This will teach more, than what you learn about it, specifically.
So, yes. The dif oil IS also the bearing oil.
But a very low level as bearings do not want much oil.
Probably not much reached the bearings.
For MY money... and TIME, if that oil does not come out, entirely uncontaminated of metal, you must replace every bearing and seal, and the crush washer, (and mind the gear mesh w yellow indicator paint.)
Others might buy a junked rear axle assembly. If a 2WD, you get a chance to change to an economical rear end or high acceleration rig.
Which then you want to do the same thing to anyway, cuz IT has old bearings and seals. YMMV.
But this is a great opportunity to earn, perhaps your first, merit badge. It is just technical enough for some basic bragging rights. You CAN do this. Utube shows all. This will teach more, than what you learn about it, specifically.
Senior Member
Joined: Feb 2021
Posts: 678
Likes: 54
You know hiw coolant goes through the radiator to cool the engine? And w an overheating car, you turn the heater on to cool the engine? The coolant goes two places?
So, yes. The dif oil IS also the bearing oil.
But a very low level as bearings do not want much oil.
Probably not much reached the bearings.
For MY money... and TIME, if that oil does not come out, entirely uncontaminated of metal, you must replace every bearing and seal, and the crush washer, (and mind the gear mesh w yellow indicator paint.)
Others might buy a junked rear axle assembly. If a 2WD, you get a chance to change to an economical rear end or high acceleration rig.
Which then you want to do the same thing to anyway, cuz IT has old bearings and seals. YMMV.
But this is a great opportunity to earn, perhaps your first, merit badge. It is just technical enough for some basic bragging rights. You CAN do this. Utube shows all. This will teach more, than what you learn about it, specifically.
So, yes. The dif oil IS also the bearing oil.
But a very low level as bearings do not want much oil.
Probably not much reached the bearings.
For MY money... and TIME, if that oil does not come out, entirely uncontaminated of metal, you must replace every bearing and seal, and the crush washer, (and mind the gear mesh w yellow indicator paint.)
Others might buy a junked rear axle assembly. If a 2WD, you get a chance to change to an economical rear end or high acceleration rig.
Which then you want to do the same thing to anyway, cuz IT has old bearings and seals. YMMV.
But this is a great opportunity to earn, perhaps your first, merit badge. It is just technical enough for some basic bragging rights. You CAN do this. Utube shows all. This will teach more, than what you learn about it, specifically.
I'm going to clean it with brake spray cleaner before putting in new oil.
Last edited by GRF150; May 1, 2022 at 03:12 AM.
Now an XLT in Colorado
Joined: Aug 2016
Posts: 5,977
Likes: 3,170
From: Colorado
Whitey, I know you'll be interested in this. Some of you other Thinkers might appreciate it, too.
https://www.motortrend.com/features/...ords-fox-body/
https://www.motortrend.com/features/...ords-fox-body/