I have just traded for a '95 CC dually, 460, 5 speed. I was changing the rear end grease and checked the tag. 4L10 was the start of the bottom line on the tag.
I guess this means it's a 4.10 ratio and whatever Ford calls a posi. If I'm correct what grease is correct to refill this with?
Also what does the 5 speed trans take for fluid?
Finally where can I find the curb weight of this truck?
The door tag says 10,000 GVW.

THANX RICH

 

Grease? You should be using 80w-90 gear oil with friction modifier (since you have a limited slip). Heavy use you should use the 75w-140 with friction modifier.

Curb weight varies based on options, etc...and can be pretty difficult to find. Best best is to just bring it to a scale and weigh it, but you can expect it to weigh around 6500-7000 pounds.

 

and the 5 speed transmission takes regular dextron automatic trans fluid.

 

Thanks for the info.
Somewhere I found that the trans takes Dextron.
I drained the rear end today and it's not any kind of limited slip, just a plain old open r/e.
I copied down all the info from the tag off the r/e,
top line; SS169N
lower line; 4L10 10 2 4H01
any ideas what all this means.
The rear cover has 12 bolts

THANX RICH

 

The only one that matters is the 4L10 which is 4:10 limited slip.

What is the axle code on the door tag?

 

I've not looked at the door tag, but it's for sure not a limited slip!!!

THANX RICH

 

4L10 is limited slip. Ford uses a clutch-pack type limited slip. The clutch plates are behind spider gears. You cannot see the clutches, and it will appear to be a normal open rear end without disassembling the carrier.

I'm assuming you're expecting it to look like a dodge helical type limited slip, or a GM G80 gov-lok.

 

I would expect to see more than what I saw when I removed the rear cover.
No sign of any type of a clutch pack, I guess I'll dump in the bottle of limited slip magoozla I bought.
Thanks for the info.

THANX RICH

 

The clutches are pretty hard to see, especially with the carrier installed in the axle.

However, if you really think you may have an open-carrier, verify it against this: The left side is an open carrier, the right side is the limited slip:



That would be very bizarre if your axle does indeed have an open differential, especially if the axle code on the door tag says you have a limited slip.

 

I forgot to look at the door tag today and the cover is back on and she's filled with grease and LS additive.
It really doesn't make a lot of difference what it is cause as soon as I get this baby cleaned up and mechanically sound she's gotta find a new home!!!
Thanks for the pics.

THANX RICH