Stuck diff fill plug stuck - how to fill my dry diff?
Cargo Master
Joined: Jun 2002
Posts: 2,033
Likes: 32
From: Aurora,Colorado
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Senior User
Joined: Dec 2005
Posts: 364
Likes: 0
From: Southern Delaware
Im sure a "slight" overfill wont hurt much...it is vented so it wont increase internal presure and blow out seals....but obviously too much would prolly create too much drag on the r/p...however, the best thing is to know the capacity for your intended axle and fill it accordingly....
Postmaster
Joined: Jul 2001
Posts: 4,956
Likes: 10
From: MD
Did Ford still put in 9"s into the '80s, or the '90s? Did the 8.8 replace the 9"?
Senior User
Joined: Dec 2005
Posts: 364
Likes: 0
From: Southern Delaware
Im sure someone else will chime in, but yea they offered the 9" until the mid 80s. the 8.8 was a pretty standard half ton axle in both 2wd and 4wd trucks....
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Senior User
Joined: Aug 2009
Posts: 142
Likes: 0
From: Wylie,TX
Proud to say there are no runs, drips or errors concerning my diff fluid change. 
I've read a few POSTS here about letting RTV set. The directions say you don't need to.
I like watching TiVo'd Horsepower TV programs on SPIKE (think there are 4 of them) and they did a thin bead of RTV on both the Diff and the cover then spread with a throw-away glove (I used a baggie).
So - you don't need to let it set and you don't need a gob of RTV.
That old Diff fluid came out like it was 10W or something less. I can't believe Ford recommends changes at 100K miles.
Is it me or does my truck seem to drive (not run) a little smoother now?
I've read a few POSTS here about letting RTV set. The directions say you don't need to.
I like watching TiVo'd Horsepower TV programs on SPIKE (think there are 4 of them) and they did a thin bead of RTV on both the Diff and the cover then spread with a throw-away glove (I used a baggie).
So - you don't need to let it set and you don't need a gob of RTV.
That old Diff fluid came out like it was 10W or something less. I can't believe Ford recommends changes at 100K miles.
Is it me or does my truck seem to drive (not run) a little smoother now?
Cargo Master
Joined: Jun 2002
Posts: 2,033
Likes: 32
From: Aurora,Colorado
Proud to say there are no runs, drips or errors concerning my diff fluid change.
I've read a few POSTS here about letting RTV set. The directions say you don't need to.
I like watching TiVo'd Horsepower TV programs on SPIKE (think there are 4 of them) and they did a thin bead of RTV on both the Diff and the cover then spread with a throw-away glove (I used a baggie).
So - you don't need to let it set and you don't need a gob of RTV.
That old Diff fluid came out like it was 10W or something less. I can't believe Ford recommends changes at 100K miles.
Is it me or does my truck seem to drive (not run) a little smoother now?
I've read a few POSTS here about letting RTV set. The directions say you don't need to.
I like watching TiVo'd Horsepower TV programs on SPIKE (think there are 4 of them) and they did a thin bead of RTV on both the Diff and the cover then spread with a throw-away glove (I used a baggie).
So - you don't need to let it set and you don't need a gob of RTV.
That old Diff fluid came out like it was 10W or something less. I can't believe Ford recommends changes at 100K miles.
Is it me or does my truck seem to drive (not run) a little smoother now?
You did put synthetic fluid back in -right??
Helps with the MPG.
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Senior User
Joined: Aug 2009
Posts: 142
Likes: 0
From: Wylie,TX
Phoneman91 - put Valvoline Durablend 80/90 in it. Part synth, part regular. Only other type they had was the Mobile1 and was past my price range.
From what I remember from the last diff fluid change I had done by QuickLube in my Durango - I probably saved $75.00 doing it myself. And it as a learning experience and an adventure.
I'll do my '01 4.7L Durango from now on as well. Dodge says every 40K miles.
/Ricache
From what I remember from the last diff fluid change I had done by QuickLube in my Durango - I probably saved $75.00 doing it myself. And it as a learning experience and an adventure.
I'll do my '01 4.7L Durango from now on as well. Dodge says every 40K miles.
/Ricache
Cargo Master
Joined: Jun 2002
Posts: 2,033
Likes: 32
From: Aurora,Colorado
Richache:
How is everything in Wylie ?? I use to live in Abilene and had a job in Sweetwater. 88 mile around trip each day for almost 5 years. Got a lot of tickets going thru Merkel. I miss living in Texas-except for that ticket thing !!
How is everything in Wylie ?? I use to live in Abilene and had a job in Sweetwater. 88 mile around trip each day for almost 5 years. Got a lot of tickets going thru Merkel. I miss living in Texas-except for that ticket thing !!
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