2003 Rear Differential Fluid Type?
I need to top off the fluid in my rear differential, what's the recommeneded type for a 2003?
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Found in the Ford Service DVD 75w-140... that still the recomendation?
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Originally Posted by daveplot
(Post 10501167)
Found in the Ford Service DVD 75w-140... that still the recommendation?
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Originally Posted by daveplot
(Post 10501152)
I need to top off the fluid in my rear differential, what's the recommeneded type for a 2003?
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Originally Posted by daveplot
(Post 10501167)
Found in the Ford Service DVD 75w-140... that still the recomendation?
The 8.8" diff calls for Synthetic SAE 75W-140 with Traction-Lok or non-synthetic SAE 75W-90 without Traction-Lok. If you have a front diff Ford specs a non-synthetic SAE 75W-90 for the front diff. |
And if you have the LSD you need modifier, if you do a change.
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Originally Posted by broncoholic
(Post 10504063)
Don't top it off just because it's "low". The fluid level is supposed to be a certain measurement below the fill hole.
As to the Friction Modifier, one place in the DVD it says XL-7 (as of 4/30/2003) but elsewhere it says XL-3 (as of 1/28/2002). What's the correct Friction Modifier, i'm assuming XL-7 since it has a newer revision date. |
Originally Posted by daveplot
(Post 10504904)
Thanks, I looked it up, it's 0.9" below the fill hole.
Originally Posted by daveplot
(Post 10504904)
As to the Friction Modifier, one place in the DVD it says XL-7 (as of 4/30/2003) but elsewhere it says XL-3 (as of 1/28/2002). What's the correct Friction Modifier, i'm assuming XL-7 since it has a newer revision date.
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.9" is right for 2004 at least.
My local ford counter man -- pretty large and sucesful place -- says that the 75w140 synth is now standard and superceeds the older heavy diff fluids, regardless what your old manual or shop manual says. He has a ford counter manual that shows that. So you can run the 75w140 up front too... Ditto all the comments about needing LSD additive. I have a leaky rear. I've decided to mix up a quart of lube with additive so I can top it off (.9" below) whenever I need to. And BTW, I too find it just plain stupid for Ford to design a diff case, where you have to use a wire bent like an "L" to find the fluid level. Like -- whatever happend to the good ole days where you filled to level of the filler hole and then you knew you had the right ammount in there...... |
Originally Posted by cdherman
(Post 10505214)
.9" is right for 2004 at least.
Originally Posted by cdherman
(Post 10505214)
And BTW, I too find it just plain stupid for Ford to design a diff case, where you have to use a wire bent like an "L" to find the fluid level.
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I just do it like I've always done, use a pump to fill through the fill hole until fluid starts to spill out, put the plug back in, done. I've never and have never heard of anyone having a problem doing it this way.
I also run full syn in front and back, 75w-90 front, 75w-140 rear with a tube of friction modifier mixed up in the first quart to go in each of them. I drained/filled each diff when I first got the vehicle, part of routine maintenance for any used rwd/4wd vehicle I buy. That and the TC/trans fluid and transfer case as well... edit: and you don't want to "top off" diff fluid. If its low and was filled properly its leaking and needs a new gasket or cover or both. If it isn't leaking it wasn't filled properly. Either way its best to just drain all the old funky fluid out and give your vehicle new fresh stuff that'll last you a while. |
Originally Posted by cdherman
(Post 10505214)
whatever happened to the good ole days where you filled to level of the filler hole and then you knew you had the right amount in there......
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