8 lug 14 bolt semi float

[df2x4]

That’s the problem i am running into everything i can find has it, sorry for the question as i am not very knowledgeable about this kind of stuff but what is the difference between 75w-90 and 80w-90? Is the 80w-90 just thicker?

Yes, specifically at lower temperatures.

 

[White96k2500]

Yes, specifically at lower temperatures.

https://lucasoil.com/products/gear-oil/gear-oil/heavy-duty-80w-90-gear-oil

does this have the additives in it? I see it says something about additives for heat but now sure if its the same thing as LS or not

 

[df2x4]

https://lucasoil.com/products/gear-oil/gear-oil/heavy-duty-80w-90-gear-oil

does this have the additives in it? I see it says something about additives for heat but now sure if its the same thing as LS or not

Per the technical data sheet:

https://lucasoil.com/pdf/TDS_Lucas-SAE-80W-90.pdf

Lists a whole bunch of additives, and PG-2 limited slip certification. I wouldn't trust it.

 

[454cid]

The 75 is what GM went to when they started using synthetic in 99. It's more expensive.

 

[White96k2500]

Per the technical data sheet:

https://lucasoil.com/pdf/TDS_Lucas-SAE-80W-90.pdf

Lists a whole bunch of additives, and PG-2 limited slip certification. I wouldn't trust it.

https://www.summitracing.com/parts/ado-10-4051/

What about this?

 

[df2x4]

https://www.summitracing.com/parts/ado-10-4051/

What about this?

Looks OK, bottle says no limited slip additive. No guarantees from me as I haven't used it, though.

 

[White96k2500]

Looks OK, bottle says no limited slip additive. No guarantees from me as I haven't used it, though.

Do you think if i called summit they would be able to tell me if it would work?

 

[df2x4]

Do you think if i called summit they would be able to tell me if it would work?

Couldn't hurt, worst case is they don't know either.

 

[df2x4]

https://www.summitracing.com/parts/ado-10-4051/

What about this?

I actually just did some more looking around, I'm at the computer now and was using my phone earlier. I think this is the exact same stuff that's in the Amazon link I posted at first but in a different bottle. If you look at the bottle of the 10-4051 in the first Amazon link that I posted in here, it has the part number of your Summit link (89021669) right on the label. It's in the description as the OEM part number as well. The bottle in the Summit link also has the 10-4051 part number on it's label. Makes me think maybe one of them is older stock that was superseded by the other. I think either one should be fine to use.

 

[White96k2500]

I actually just did some more looking around, I'm at the computer now and was using my phone earlier. I think this is the exact same stuff that's in the Amazon link I posted at first but in a different bottle. If you look at the bottle of the 10-4051 in the first Amazon link that I posted in here, it has the part number of your Summit link (89021669) right on the label. It's in the description as the OEM part number as well. The bottle in the Summit link also has the 10-4051 part number on it's label. Makes me think maybe one of them is older stock that was superseded by the other. I think either one should be fine to use.

That is good news, i think i can afford $9 a bottle. Also I have another question, how many bottles do you normally buy when changing the fluid and gasket? And do you have any gasket recommendations?