From reading other threads, i think the below door label means I have:

Limited slip
9.75"
3.55 gears

my label says:

BRK
C

INT TR
HH

R
8

AXLE
H9

TR
U

SPR
69

1F514
F0A



Am I right? what does the rest of it mean?
Is 3.55" "OK" for towing? don't know much about it.

 

bump...you guys are usually pretty quick!

 

Since its a 5.4 yes you have a 9.75 if it was a 4.6 it would be an 8.8
Most of the 5.4s came with 355s unless it was ordered special or a special edition.

 

what's the 3.55 like for towing?

 

Never do much towing but I'm running 4.10s in my truck now.

 

mine will go to the grave with whatever 3.55 she came with...

 

With the 5.4 it will tow fine with 3.55 gears and even better if you have a manual trans. The 3.55 is a good all around gear ratio to have or I think it is.

 

so, like a 3.73 (if it exists) would give better mileage, but not as good for towing?

 

It all depends on what size tires you are running.
When I went from 3.55 to 4.10 My guy told me it was not worth the money to go from 3.55 to 3.37.He said I would hardly feel a difference.
With the 4.10s and my stock 16" tires it runs about 400 more RPMs at 70 MPH then it did with the 3.55s.

 

BRK - Brakes, though I don’t have a C listed as an option It’s probably 4 wheel anti-lock.

INT TR - Interior Trim, Leather captains chairs, Medium parchment

R - AM/FM premium stereo with compact disc (CD) changer and cassette

AXLE - 3.55, limited slip

TR - Transmission, four speed automatic AODE (4R70W)

SPR - Spring codes YL34-5560-AF, Leaf. You should have a letter and not a number for the front springs

The last few numbers are your power train calibration codes.

 

They seem to work well in my 97 4.6 and i've pulled 4000# on the highway. It took me a little to get up to speed but once I did I could maintain 60.

3.73s would get you better milage and would be better for towing because the engine doesn't have to work as hard to get the load moving.

 

thanks guys...

I'm running P265/70R-17's and never tow a thing....putting a class III/IV hitch on it soon anyway.

 

you should be fine with your 3.55s