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  #1  
Old 11-03-2009, 08:57 AM
RangerLuc RangerLuc is offline
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Default differential flush

im flushing out my diff today and puting some new fluids in it. what kind of fluids do i get though?
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SAS'd D44 and 8.8. dual lockers, 38s, 12 bolt h1's, some other odds and ends
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  #2  
Old 11-03-2009, 09:06 AM
STL STL is offline
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75w140 synth oil

if you run full synthetic gear oil, then you don't need the friction modifier, but if you run a conventional gear oil then you will need friction modifier
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Old 11-03-2009, 09:07 AM
RangerLuc RangerLuc is offline
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alright thx man appreciate all ur advice
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2001 XLT 4x4 V6 4.0L auto
SAS'd D44 and 8.8. dual lockers, 38s, 12 bolt h1's, some other odds and ends
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  #4  
Old 11-03-2009, 09:13 AM
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Royal Purple is what I put into mine I think it took 2 1/2 bottles to fill I was over a year ago so maybe wrong

Just use the fill hole on the driver side that is toward the front of the truck. Make sure truck is on level ground. Fill with fluid till it starts to pour out the hole
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Old 11-03-2009, 09:29 AM
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Here is a picture to show where to fill the axle
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Old 11-03-2009, 09:39 AM
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I know that my 8.8 requires 75W90 if I'm using synthetic. Also, you don't need a friction modifier since you have an open diff.
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  #7  
Old 11-03-2009, 09:41 AM
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Only L/S needs friction modifier right?
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Old 11-03-2009, 09:52 AM
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Quote:
Originally Posted by STL View Post
Only L/S needs friction modifier right?
Yup. I'm not sure if you need it with a locker, but yeah open diff doesn't need it, L/S does.
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  #9  
Old 11-03-2009, 09:56 AM
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Okay I used the 75140 synthetic royal purple
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Old 11-03-2009, 10:49 AM
whippersnapper02 whippersnapper02 is offline
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Be careful with some synthetic oils. Some don't contain enough friction modifier and can cause the l/s clutches to chatter. You need it for l/s diffs but not open or locker diffs with the exception of the Auburn ECTED. Not sure if it needs it since it is both a locker and l/s.
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  #11  
Old 11-03-2009, 11:43 AM
RangerLuc RangerLuc is offline
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what size bit do i need to take out the filler cap screw?
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2001 XLT 4x4 V6 4.0L auto
SAS'd D44 and 8.8. dual lockers, 38s, 12 bolt h1's, some other odds and ends
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Old 11-03-2009, 11:44 AM
whippersnapper02 whippersnapper02 is offline
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Just a 3/8inch drive.
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A 2wd will go most anywhere a 4x4 will go as long as the ground is flat and dry. And as far as a 2wd rock crawling, well, that ain't rock crawling.
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  #13  
Old 11-03-2009, 11:44 AM
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Mine was a 3/8 square I just used a ratchet with extension on there and pulled it out
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Old 11-03-2009, 11:46 AM
RangerLuc RangerLuc is offline
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ok cool so i dont need to go and buy a bit? just the 3/8 inch drive head?
and tom said his 8.8 used 75w 90....is 75w 140 gunna work in mine?
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2001 XLT 4x4 V6 4.0L auto
SAS'd D44 and 8.8. dual lockers, 38s, 12 bolt h1's, some other odds and ends
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  #15  
Old 11-03-2009, 11:54 AM
modelageek modelageek is offline
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how do you know if you have a l/s differential
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