1995 Ranger Rear Diff Fluid Question

[ryguy1825]

It is a 2wd 4 cyl and I want to change the rear diff fluid. I have seen many posts regarding different types of fluid. I am not sure if I have limited slip or not, I do not think I do. The axle code is 3 45 75 5b07 (I think since its hard to read now).
Suggestions on what fluid I need to use? Do I need a friction modifier? How much goes in the differential?

Thanks guys

 

[Tbars4]

...What does your axle code say on your door sticker?

...IIRC, the numbers you just posted are from the rear end tag showing you have 3.45 gears in a 7.5 rear axle...:scratch:

 

[ryguy1825]

I wish I knew! I got hit and put a new door on and had it painted so I cannot see the sticker anymore.

 

[Tbars4]

...If your tag had a 3L45 it would be a Limited Slip...I believe yours is (3 45) an open carrier but your door tag would confirm that...

 

[ryguy1825]

assuming it is not a limited slip, what oil do I need? How much?

 

[Tbars4]

...I would just grab a gallon of SAE 80W or 90W gear oil...

...Your local auto parts store will have these in stock..