Greetings all...

Finally got the bearings / seals and all back together. Game time to all the gear oil (differential fluid) back. It barely took 2 quarts to reach overflow. Several of the gear heads at the local auto parts stores swear it's three. Am I missing something?

In retrospect, I don't think much over two quarts came out of it when I drained it.

Just wanting to make sure I'm not missing something.

THNX for the assist / help.

Nope. I've never had to more than just under two quarts in mine. Fill-er-up to the bottom of the plug hole and your good.

Joe

About 2 was what my 10 bolt held when I had a 10 bolt. I used a Richmond gear set that came with pretty comprehensive instructions which I even read.:D. Wherin I learned something too:D. It gave different methods of filling for different applications, like jacking up one side of the car for dirt track etcetera.

I figure for street app that fill hole is about where you want it. And I bet if it was half full nothing would get hurt anyway. Splash lube is extremely powerful. Stories available on request.

You might run it a few miles and re-check the level because the axle tubes will retain a smidge.

GM lists the capacity at approx. 4 pts, or about 2 quarts. As mentioned, the level should be at the bottom of the fill plug hole when hot.

Thanks all, drove her yesterday, so far so good!

Greetings all...

Finally got the bearings / seals and all back together. Game time to all the gear oil (differential fluid) back. It barely took 2 quarts to reach overflow. Several of the gear heads at the local auto parts stores swear it's three. Am I missing something?

In retrospect, I don't think much over two quarts came out of it when I drained it.

Just wanting to make sure I'm not missing something.

THNX for the assist / help.

Hello Frank! :waving: Two quarts is it. Regardless, if it's full and starting to run out the fill hole, then you can't get anymore in anyway. :)

Save yourself some money and hassle by using a high quality synthetic 75W-90 gear lube and you can virtually forget about needing to replace bearings again. :)

Sounds like a nice car you have!

Save yourself some money and hassle by using a high quality synthetic 75W-90 gear lube and you can virtually forget about needing to replace bearings again. :)



I just had an Eaton Posi unit put in my 10 bolt and was told DO NOT use synthetic :confused:

what kind of fluid is everybody using?are you supposed to mix the gear oil with a posi traction fluid?

If the gear oil doesn't already have the additive in it, yes.

:thumbsup: Thanks

what brands already have the additive?and if you buy the additive seperate where can you get it?

what brands already have the additive?and if you buy the additive seperate where can you get it?

The brand I have been carrying for 22 years, (AMSOIL), has it in the Severe Gear series of gear lubes. As for other brands, you'd have to contact the manufacturer for verification, but it is my undestanding that very few are formulated with the additive already in the gear lube.

I just had an Eaton Posi unit put in my 10 bolt and was told DO NOT use synthetic :confused:

1997 + Ford Explorer has factory installed synthetic grear lube in the rear differential and it is required to use synthetic gear lube to maintain the warranty. Many other vehicles also come from the factory with synthetic gear lubes.