changing gear oil

[jlds91389]

so i want to change my rear gear oil just don't know what to use? by that i mean do i need any special addictives or anything like that or can i use just straight oil?

 

[2000GTdriver]

SAE 80W-90 GL-5 gear lubricant, plus 4 oz. friction modifier (from Ford, for Trac-Loc)

 

[jlds91389]

i thought it called for like 75 140 or something like that and fully synthetic

 

[ErikTheBeast]

I used royal purple 75-90 , kinda wish I would of used 75-140. You dont need friction mod with it. If you get friction modifier from ford ask for XL-3.

 

[jlds91389]

so do i have to have the friction stuff or not lol im kinda confused

 

[Tim2002GT]

If you get the Royal Purple brand you will not need to get the friction modifier. I use RP 75w-90 in mine also.

 

[Pearl02]

Before you pull the rear cover, make sure you can get the fill plug out. All it takes is a 3/8 drive extention to remove it. I've had those plugs freeze up and a bitch to get out. Also, do yourself a favor and buy pump to get the oil back in. You can buy a pump that will fit into gear oil bottle. They aren't that expensive. I think I paid 7 or 8 bucks for mine. Pearl02.

 

[jlds91389]

^^ already have one lol. will i notice any difference in my car if i change it?

 

[Killa]

^^ already have one lol. will i notice any difference in my car if i change it?

No, but it will make you happy.

 

[Nightstick]

No, but it will make you happy.

But seriously, I run 75W140 Mobil 1 with no additional modifier. No clutch chatter to speak of.

 

[spederman]

i use royal purple 75/140 and no friction modifier since royal purple already has it. I know a lot of people use 75/90, but the shop i go to said they have seen some pre mature wear on rears using 75/90. Ive been using 75/140 and have no probs.

 

[4tun8]

^^ already have one lol. will i notice any difference in my car if i change it?

You will notice the stench of gear oild (worst smell ever) for days.

 

[GettinThere]

so i want to change my rear gear oil just don't know what to use? by that i mean do i need any special addictives or anything like that or can i use just straight oil?

My 2002 owner's manual says to use "Motorcraft SAE 75W-140 Synthetic Rear Axle Lubricant", and to fill it to "2.0L (4.25 pints)".

Royal Purple has the friction modifier in it already, but others like Motorcraft require 4 oz of Ford friction modifier.