For a 2003 Ranger 4x4? (rear differential)

 

i belive it is 4.10s

 

well depending on the phase of the moon and the migratory pattern of the african swallow when your truck was built it could be 3.73s or 4.10s as the most common, but not leaving out 3.45s either, although those were mostly phased out by about 97ish or so... the easiest way to tell is to look at the axle tag on the rear axle as it will tell you the exact ratio on it.

 

on your door jamb you will have a 2 digit axle code... go check that and report back so we can tell you what it is... my money is on a 8.8 4.10 L/S

 

or check your rear diff if the tags are there one should read 4L10 88 C*** and it it reads 3 73 88 then its 373 gears and so on..

 

check your door tag....look for an area with "AXL" on it....look under it for either a 2 digit number or a 2 digit letter and number combo....

then go to this writeup i did on axle codes and find yours....that will tell you what axle, gear ratio, and if you have a limited slip...
http://pedia.rangerresource.net/inde...tle=Axle_Codes

 

my 1999 has 410 with stock tires it should run a little over 2 grand @ 60

 

Well first of all, your front and rear differentials have to have the same ratio, otherwise stuff will start blowing up really fast

My money is on 4.10, but do like they've said check your axle tag and that'll tell you everything about your axle.

 

Okay, I knew it was something that involved code language, just didn't know where to look. I'll look after I get out of school. That's wierd because my Z28's stock rearend ratio was 2.73 airplane gears (now 4.56) whereas my truck is probably a 4.10 or 3.73! (But that's to compensate for the low HP right?)

 

Your truck is geared for worst case which is towing at GCWR. Driven as an unloaded commuter vehicle (as many Rangers are), it could easily get by a numerically lower ratio.

 

All FX4s have 4.10.

 

i thought so but wasnt sure

 

Okay, I got under the truck and all I could find was this code on a metal tag attached to one of the diff. cover bolts.:

V333K
10 88 3C06

Then I looked at the door tag but couldn't find anything, see if I missed anything:

 

see the area i circled in red? that is your AXLE code under it which is: R7.....which means you have a 4.10 L/S (limited slip) rear diff with a 4.10 open front diff...

 

if you also look at your diff tag and beside the 10 there will be a 4L its probably covered half way witha bolt but maurice is right!

 

Wow, thanks guys. I wonder how I missed that? When it was in huge letters right in front of me AXLE
R7
So 4.10's with limited slip differential. Sounds good!
Thanks

 

^^ lol.....yea that is a good deal...