Capacity of Rear Differential?

[colnago]

All,

I have a '67 F250 Camper Special with a B4 axle code. The Tech section says that this is a locking rear Dana 60 with a 4.10 gear ratio, and a capacity of 5.2M. I'm not sure what the 5.2M means. Does anyone know if the "M" is pints/quarts/other? From reading, I take it that the stock gear oil is 80W-90. Is this what everyone is using?

Thanks,

Joseph

[Busboy]

I believe that refers to the weight capacity of the axle. 5,200 pounds. It doesn't indicate the oil capacity.

[colnago]

Ah, that makes sense. Now back to the real question: does anyone know the amount of gear oil I need, and should I use 75W - 90 or 80W - 90, or does it matter?

Thanks for the clarification!

Joseph

[colnago]

After putzing around on Google, it looks like I need 6.4 quarts for a Dana 60 rear. Now I just have to research what weight oil to use, and if I need any additives.

Thanks,

Joseph

[ultraranger]

After putzing around on Google, it looks like I need 6.4 quarts for a Dana 60 rear. Now I just have to research what weight oil to use, and if I need any additives.

Thanks,

Joseph

6.4 quarts or 6.4 pints? A truck shop manual will tell you this information.

If you have a factory Traction-Lok differential, you'll need 4oz of friction modifier. You can get a bottle from your local Ford place. It's p/n XL-3 FIR No. 135454. It's about $7.00 dollars a bottle.

Pour the friction modifier in first then pour the gear oil in until it just starts to run out of the fill plug hole.

I use GL-5 80W-90 gear oil in the 9-inch rear end under my truck with a 31-spline Traction-Lok differential. The 9-inch in my truck takes 5 pints of gear oil. That's all of two bottles and half of another so, it requires getting three bottles of gear oil.

[HIO Silver]

80W90 or if towing/hauling regularly consider 75W140.

Additive only if equipped with a limited slip differential.

[colnago]

6.4 quarts or 6.4 pints? A truck shop manual will tell you this information.

If you have a factory Traction-Lok differential, you'll need 4oz of friction modifier. You can get a bottle from your local Ford place. It's p/n XL-3 FIR No. 135454. It's about $7.00 dollars a bottle.

Pour the friction modifier in first then pour the gear oil in until it just starts to run out of the fill plug hole.

I use GL-5 80W-90 gear oil in the 9-inch rear end under my truck with a 31-spline Traction-Lok differential. The 9-inch in my truck takes 5 pints of gear oil. That's all of two bottles and half of another so, it requires getting three bottles of gear oil.

Oops! 6.4 pints.

Thanks for the info on the friction modifier.

Joseph