Hello,

Here are the numbers off of my 97 f-150 xlt. It's automatic, 2wd.

S 869B R
3L55 88 6F26

Could someone tell me how I would get the gear ratio, and what other models may have a compatible rear end?


Brandon A. Coleman

 

What is the axle code from the sticker on your door jamb?

 

S869BR - This is the factory code used for that axle assembly. If your dealer were to order you a complete axle, this is the part number they'd use.

3L55 - This indicates that you've got a limited slip (the L) axle, with a 3.55 axle ratio. An open 3.55 axle would just be "355," 3.73 would be "373," and so on.

88 - This is an 8.8" axle. "975" means it's a 9.75" axle, "80," for an 8" axle, etc.

6F26 - This is internal coding used to determine what plant that axle was built at and when.

 

The axle code is H9.


Brandon A. Coleman

 

Quintin,

You are the man! Appreciate it man.


Brandon A. Coleman

 

Hello,

How would I find out, besides opening up the cover, if it is a 31 spline?


Brandon A. Coleman

 

It is a 31 spline and also the 6F26 means that it was made at the Sterling Plant on the 26 of June 1996.
6 = year
F = month (A=1, B=2 ..... there is no 'I' in the sequence)
26 = day of month