Differentail oil question ???
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From: Monroe Michigan
Differentail oil question ???
Well it's time for myself to change the rear differential cover do to rusting,
My question is do i need to had friction modifer that ford sells if i use Mobil Synthetic 75w - 140. I've been told by others that i don't with Mobil Synthetic.
Any help would be great. Thanks.
My question is do i need to had friction modifer that ford sells if i use Mobil Synthetic 75w - 140. I've been told by others that i don't with Mobil Synthetic.
Any help would be great. Thanks.
Hotshot
Joined: Dec 2003
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From: iowa
well first question is do you have a limited slip diff? But to outright answer your question actually no you don't as the mobil 75w-140 has friction modifiers in it already according to thier info specifically for running it in limited slip diffs. I suppose they did that so people won't add other friction modifiers to thier gear oil that may not be compatable.
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From: west MI
from Mobils site
Mobil 1 Synthetic Gear Lube 75W-140 LS contains special friction modifiers designed for limited slip-type differentials. In most applications, the addition of special LS (limited slip) additives is not required. For axles requiring the highest level of limited-slip performance, OEM specific LS additives can be added to this fluid.
Mobil 1 Synthetic Gear Lube 75W-140 LS contains special friction modifiers designed for limited slip-type differentials. In most applications, the addition of special LS (limited slip) additives is not required. For axles requiring the highest level of limited-slip performance, OEM specific LS additives can be added to this fluid.
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From: San Diego, CA
After you addd the new differential fluid, drive in figure 8's. If there is chirpping going on you will need to add some kind of friction modifier. I used the Amsoil syntehtic and it was very obvious that I needed to add some of the modifier when I did any turns!
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From: round rock, tx
Originally Posted by maevans
Well it's time for myself to change the rear differential cover do to rusting,
My question is do i need to had friction modifer that ford sells if i use Mobil Synthetic 75w - 140. I've been told by others that i don't with Mobil Synthetic.
Any help would be great. Thanks.
My question is do i need to had friction modifer that ford sells if i use Mobil Synthetic 75w - 140. I've been told by others that i don't with Mobil Synthetic.
Any help would be great. Thanks.
I bought Majestic75W-140 gear oil and bought the friction modifier for the rear LS 3:73 of my 2002
I have had no issues
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Joined: Sep 2005
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From: Monroe Michigan
Originally Posted by toyota hauler
Do you have a Blaine's FARM n FLEET?
I bought Majestic75W-140 gear oil and bought the friction modifier for the rear LS 3:73 of my 2002
I have had no issues
I bought Majestic75W-140 gear oil and bought the friction modifier for the rear LS 3:73 of my 2002
I have had no issues
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From: Monroe Michigan
Originally Posted by magnum300
When I did mine I put a Mag Hytec cover on it, going to be much easier to change the fluid next time
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From: Monroe Michigan
Originally Posted by PSNut
Ditto on the MAG-hytec unit...real nice.
BTW Mark, I believe ther's a TSB out that is saying to use the 75W-140 in the front diff. too.
Nut
BTW Mark, I believe ther's a TSB out that is saying to use the 75W-140 in the front diff. too.
Nut
.
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Joined: Jun 2005
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From: New Hampshire
Originally Posted by John7894
Don't these trucks specifically require synthetic in the diffs? Any reason why?
Nut
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