I found a rear end for a 2003 ranger
It says it is a 8.8" ring gear, 9" brakes, 4.10 ratio

How do I know what size brakes I got?

They also list one wth 10"

other info listed

2003
Rear Axle
Ford Ranger V330K 410 NON LOCKER

 

measure the diameter of the brake drum

 

I think 95% of ranger are 10" I think the only ranger that have 9" came stock with 14" rims

 

I am sure all the edge's came with 10" I know mine did and its an 04

 

if its a regular cab, it has 9" drums
if its a super cab it has 10" drums
or so im told. i ve never seen a super cab with 9" or a reg cab stock with 10"

*all edges have 10" brakes*

 

could I swap this out and be allright with a 1" smaller drum and be okay or would it not work

Or could I swap my 10" drums over to this and it work

 

Would this swap right over no problem since it is for a FX4 Level II

2006 Rear Axle Ford Ranger 4.10 ratio, FX4-CK LVL II 8,000

 

Yes

 

if it was in a FX4, then it has 10" brakes. It will bolt in no problem.

 

The LII axle is a bolt in swap. Just be sure that it includes the brakes or at least the brake backing plates. The backing plates on your 28-spline will not bolt up to the flanges on a 31-spline LII axle housing.

 

Thanks Bob for your help

One other question I know I asked before but I lost the pm

When I put on the explorer IRS diff. cover I just fill it with fluid till it reachs the top right??

 

Do not use the fill level hole on the back of the Ex cover - it is positioned for the IRS diff. Your axle needs a higher fluid level to lubricate the wheel bearings. Instead, use the original fill level hole on the side of the differential housing.

 

filling it up till it reaches the top of that hole right

 

fill it till it comes out the stock fill hole on the front of the axle.