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Proper gear oil


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bigjohn
User

Jan 4, 2013, 2:07 PM

Post #1 of 3 (918 views)
Proper gear oil Sign In

1995 Mercury Grand Marquis, 4.6 engine, 155,000 miles

What is the proper type/ viscosity of gear oil for the differential in my 1995 Mercury Grand Marquis?

Big John


Discretesignals
Ultimate Carjunky / Moderator
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Jan 4, 2013, 3:36 PM

Post #2 of 3 (895 views)
Re: Proper gear oil Sign In

90w gear oil. If it has Trac lok, you have to add 4 oz of a friction modifier.





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Tom Greenleaf
Ultimate Carjunky / Moderator
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Jan 4, 2013, 4:40 PM

Post #3 of 3 (884 views)
Re: Proper gear oil Sign In

To add: If not sure what differential just hoist rear wheels, car in "N" and spin one. If the other spins the opposite way it's a regular differential. If they spin the same way it has some kind of traction control and would require gear oil or additive as DS mentioned to be right,

T






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