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Discussion Starter · #1 ·
I'm going to be putting in an eaton posi in another week or two in my GN. I was debating on going with synthetic or regular gear oil. I'm not very concerned about the price but about leaks. I had heard Some cars seem to leak forever with synthetic gear oil. I will be installing all new seals at the same time. Is there truth to the myth, should I stick with regular gear oil? I will be re-using my stock gearset and axles which has a whopping 26,000 miles on them. I'm looking for reliability mainly. I hate having stuff break or discovering problems all the time.
 

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Gnx6 said:
Is there truth to the myth, should I stick with regular gear oil?
I'd stick with the *regular*.
 

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From the Eaton site

What type of lubricant and limited slip additive should I use with my newly purchased Eaton Limited Slip Differential?

Eaton strongly recommends utilizing an API-GL5 approved Mineral-Based 80W-90 Axle Lubricant and one 4-oz bottle of Limited Slip Additive (GM or Ford).
 

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Eaton spoke, not me...but, why use 2 bottles? My eaton works fine with one
 

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Discussion Starter · #6 ·
I've seen various cars that have been noisey after a service, drain it out and refill with fluid and 2 bottles, noise is gone. I heard it a few times from various people. I know if one works why use 2, Damn I wish I could remember where I heard it. I think I heard it from a few racers/enthusiasts. Perhaps the F-Body crowd? Thanks for the input.
 

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You can always add a second if required, but, you cannot take it out..

from the Eaton site, they suggest one :)
 

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If you are buying the Eaton posi new just look at the Bright Neon paper in the box that says "dont use synthetic lubricants as they will hamper the clutch operation".

I use this and have thousands of trouble free miles in both my GNs.

1 bottle-Valvoline 75w90 mineral gear oil
1 bottle- Lucas oil stabilizer
1 tube/container of limited slip additive (KW, GM, Mopar)
 
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