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Ford F-Series Axle and Ratio Questions

22 messages,  Last post on May 22, 2013 at 4:14 PM

You are in the Ford F-Series Forum.

What is this discussion about? Ford F-150, Ford F-250, Ford F-350, Truck

Messages Page 2 of 3

#10 of 22 1999 F150 AXLE RATIO by gasa765

Mar 15, 2007 (10:49 am)

I have a 1999 F150, with 4.6L V8, supercab, auto transmission. The code for the axle ratio is H9.
When I called a Ford service dept, they told me they could only check back to 2000, but the H9 indicated a 3.55 axle ratio. I checked the owners manual and couldn't find anything. Can anyone verify the H9 is a 3.55 for a 1999?
The reason I'm asking is depending on what the axle ratio is help determine how big of a travel trailer we can buy.

#11 of 22 Re: 1999 F150 AXLE RATIO [gasa765] by wpalkowski

Mar 16, 2007 (4:18 am)

Replying to: gasa765 (Mar 15, 2007 10:49 am)
Get your VIN # and enter it into this Web site.
 
Should break it down to tell you what all the numbers mean along with the axle ratio:
 
Ford VIN Decoder

#12 of 22 5.4v8 with 3.31 axle ratio by gregkay

Mar 28, 2007 (1:21 pm)

I have a ford 2006 reg cab stx package with a 4.6v8 and 3.55 axle. They are now offering a 5.4v8 with a 3.31 axle. Obviously more horsepower, but better fuel economy? how about towing comparisons? engine life, etc? Comments would be welcome.
thx,
-g

#13 of 22 5.4 is much better engine than the 4.6 2v by mschmal

Mar 30, 2007 (10:47 am)

It has vari-valve timeing, electronic throttle. this gives comparable gas milage.
 
Mark.

#14 of 22 Rear End Switch for 92 F350 by lphilips

Nov 15, 2007 (12:40 pm)

I've got a 92 F350 that needs a new rear end. The axle has the following markings:
 
B124 D
3.55 10 2 2C02
 
I've found a junk F250 with the floating rear end (8 lugs) same as my current rear end but markings on the end of the hub are different. The axle markings are:
 
S125 P
3.55 10 2 7F23
 
Hub markings for old and new axle are:
 
old: 5T8 CA / A55 MW
new: 5T8 CA / DO DF
 
Measurements from backing plate to backing plate and leaf spring center to leaf spring center are the same.
 
It appears the gear ratios are the same. Does anyone know if this axle will work?

#15 of 22 '72 F-350 long wheelbase by cayoterun

Jan 21, 2008 (8:44 pm)

Hi, new here and first post:
 
I'm needing to put the highest differential gear ratio in this truck.
Does anyone know the highest ratio available for them. I'd like as close to 3. as I can. Putting a low max rpm, high torque motor in front of it. No heavy use on it tho, just hiway use, with light loads.
Thanks,
Cayoterun

#16 of 22 Re: 5.4v8 with 3.31 axle ratio [gregkay] by want2go2

Jul 17, 2008 (8:42 pm)

Replying to: gregkay (Mar 28, 2007 1:21 pm)
Have you received any reply's on your post. I just took delivery of a 5.4 V8 F-150 and found out it has a 3.31 axle ratio. I don't know if thats good for towing about 4400 lbs Do you know if a 3.55 would be better for all around towing and regular driving. Thanks.

#17 of 22 towing ability of F150 by campman1

Jul 28, 2008 (10:30 am)

Have 2003 F150, 4.6L, rear axle ratio of 3.08...How much can I tow, e.g. a small camping trailer....what about tongue weight? Should I consider changing the axle ratio? Thanks

#18 of 22 Rear Axle Rebuild by snowbrdjnky

Apr 04, 2009 (8:53 pm)

Im not sure if this is the correct spot to put my question, but i will try it and hope for the best. I am trying and learning to rebuild my rear axil. This is the first place i thought of for help. Its off of a 1978 F 150. It has a 3rd member. I am having trouble removing the bearing on both (FORGIVE MY TERMINOLOGY) shafts going to each rear tire. there is a press on stop of some sort that i can not remove. Any any information would be greatly appriciated. On any aspect of the rebuild.

Messages Page 2 of 3

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