diff fluid change problems please help

[gmanpaint]

This should help you out. Only thing diff I do is put the rtv on the diff, instead of the cover, and I go all the way around the bolt holes. You dont have to use the ABS sensor to fill it, use the fill hole on the front side of the diff.

http://www.explorerforum.com/forums/showthread.php?t=242694

^^^That is all you need to know for the most part.

 

[bluestream1]

Gmanpaint. Problem is that is fill plug is seized and he can't get it out.

5.7 pints is what you want to get in there.

 

[gmanpaint]

Sorry, my bad, forgot about the stuck fill plug.

I meant to say 2.5 bottles, not pints. Bottle is 32 oz's. 1 qt.x 2.5 = 5 pints. Like I said, they are all different. with out being able to use your fill plug, it's up to you how much. I was speaking of my own diff.

 

[Carguy3J]

Yeah, I would agree that 2 to 2-1/2 BOTTLES sounds about right. Also, make sure you're using the right gear oil!
Check the tag on your rear cover, to find out if it is a limited slip rear. You also need to use the right "weight". I recommend Mobil 1 75W140 synthetic. Yeah, it's expensive, but your rear axle is an important and expensive part. Also, supposedly, the good synthetic gear oils claim that you don't need the limited slip additive. I'd still put some in anyway, if you have an LS.

 

[bluestream1]

Ford reccommends 75W-140 for all of the rear axels now. As for the additive, if the oil has in in already, do not add any more. That additive does no lubricating, so as little as possible to keep the clutches from chattering is what you want

 

[Carguy3J]

Ford reccommends 75W-140 for all of the rear axels now. As for the additive, if the oil has in in already, do not add any more. That additive does no lubricating, so as little as possible to keep the clutches from chattering is what you want

I don't think they have it in them per-se. I think that some of the good synthetics (Mobil-1, Royal Purple) say on the bottle that you don't need to add LS oil with their oil. I could be wrong. I added the small bottle of LS oil anyway, and I haven't had any problems.

 

[bluestream1]

I know that Redline or Amsoil has the LSD additive in already. (You can get it with out the additive as well, but it is not popular) My email to Redline came back with a recommendation for 75W140 with the LS additive and I have a conventional axel with 4:10 gears. There is no advantage to putting in extra additive.

 

[Scott B.]

Dan, I would not even use the diff gasket. They are crap for the most part.

I disagree. I always use a new gasket - a Victor-Reinz (sp?) or Felpro work really well.

I coat both sides of the gasket with Permatex Ultra Copper gasket sealer - has never failed me.

Overkill? Maybe - but the extra few minutes invested pays off in the long run.

 

[dannyces]

hello again everyone
first off i wanna say thank you for all the help, second i wanna say i beat that ***** :
i got it all done last nite. i ended up putting in about 2 bottles i am gonna top it off tonite with about half a bottle and pop in the new abs sensor
i dont know if this could have done it but the truck feels 1000 times more lively, the gas pedal used to be real spongy now it has some firmness to it. does that sound right??? i hope its a good thing cause the truck really feels better
thanks again
Danny

 

[chance942]

I disagree. I always use a new gasket - a Victor-Reinz (sp?) or Felpro work really well.

I coat both sides of the gasket with Permatex Ultra Copper gasket sealer - has never failed me.

Overkill? Maybe - but the extra few minutes invested pays off in the long run.

Sounds good to me.

 

[gmanpaint]

I disagree. I always use a new gasket

I agree to disagree:

I said "For the most part".

The gaskets that come with a cover, or a rebuild kit are thin paper gaskets. I wouldn't trust them to keep in the fluid. A nice aftermarket specialty gasket is a diff story.

 

[Scott B.]

The gaskets that come with a cover, or a rebuild kit are thin paper gaskets. I wouldn't trust them to keep in the fluid...

I'll agree with that. Paper thin gaskets are useless.

The Victor-Reinz gaskets were the best - thin metal sandwiched inside of cork. Made a great seal, very durable and never leaked.