Limited Slip/Traction Lock Axle Differential Friction Additive
 

Hello, back again. going to use Motorcraft 80W90 premium gear oil for front and rear axles. My next question do I have to add friction additive to both front and rear or rear only if i need it? Went to Ford Dealer to find out exactly what axle I had and got know real answer from him so if any of you gentlemen have real experience with this here is what I know

2004 Ranger 4x4 Edge 3.0 5speed manual
axle tag reads
V330L
4 10 88 3L04 Door Jam Axle: 97

Widow Sticker says
4.10 Ratio Regular Axle

Build Sheet
Axle size (EGP)
Axle Type (EJA)
8.8 Axle (EGPAEO)
Rear Axle (LESS) Limited Slip DIFF (EGJABO)

Thanks,Mark.....

You only need the addidtive for the rears. Try (if you havent already) Valvoline synthetic 75w90. Its good stuff and comes with the additive in it

I think I would do some more research on the subject or wait for an expert on here to clear it up. If I am reading your post right your axle code is 97 which isn't a limilted slip.

Regardless, I just changed my rear diff fluid and pinion seal on my 2002 XLT and used 75W90 LS mobil one and it seems to be fine. LS if for limited slip but I don't think it would hurt even if you have an open axle. I would recommend using sythetic, but JMO. Good luck, by the way it wasn't too bad of a job, did it in a couple hours.

Just another question for you. Whats the reason your using 75W90. Is that its only available in synthetic? The manual states using 80W90 premium gear oil, whats the difference between the 75W and the 80W except 5 numbers LOL

Thanks,Mark..

I'm not sure on the difference, I went with the research end on it with recommendations etc

THANKS!!

It's just like motor oil... the first number specifies the oil viscosity at cold temperature, the second number is the oil viscosity at high temperature.