what gear oil do you run?

[SkyHighColorado]

About to change rear end and front diff oil on my 94' z71

Please say Brand, Weight, and any additives. Thanks.

 

[SkyHighColorado]

Anyone? I'm curious what you are all running.

 

[eg30.06]

75 90 synthetic mobile1 with locker additive

 

[JollyGreen]

Lucas Oil 75w-90 synthetic

http://www.lucasoil.com/products/display_products.sd?iid=47&catid=12&loc=show

 

[thz71]

80w-90 and you need a friction additive because of the posi

 

[SkyHighColorado]

80w-90 and you need a friction additive because of the posi

Thanks for the info! I went with Lucas 80w90....and FelPro gasket with red High temp rtv.
Front diff was easy....pretty dark oil came out, but nothing compared to my rear diff.

Can you help me identify what gear ratio I have? And if I have a G80? (photos)

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And then I found this!

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[Blazed]

41x9 Looks like you got 4.56's there buddy.
And that chunk of metal... Not good. Looks like a tooth off your pinion.

 

[SkyHighColorado]

41x9 Looks like you got 4.56's there buddy.
And that chunk of metal... Not good. Looks like a tooth off your pinion.

Thanks! Thats the ratio I was wishing for! As for that metal chunk i think your right. I checked the ring over and only a scratch.i couldnt see the pinion very well so I guess its from there. How bad is this situation? I cant tell anything is wrong. no noise. i cleaned it out really well to make sure no more metal is in it.

 

[Blazed]

Well not exactly knowing whats wrong I cant really say how to go about fixing it. But I would look into it A.S.A.P.
A new 4.56 R and P set from Summit is only $150. A rebuild kit around $50-60. Cheap insurance instead of having to replace the whole assembly down the road.
Then again for a few hundred more you can get a junkyard 14 bolt and built it up new with 4.56's for about $450 total.

 

[SkyHighColorado]

Well not exactly knowing whats wrong I cant really say how to go about fixing it. But I would look into it A.S.A.P.
A new 4.56 R and P set from Summit is only $150. A rebuild kit around $50-60. Cheap insurance instead of having to replace the whole assembly down the road.
Then again for a few hundred more you can get a junkyard 14 bolt and built it up new with 4.56's for about $450 total.

Now you got me thinking about a 14 bolt. I think im going to go find one really soon and build it up.