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Ford F-Series Axle and Ratio Questions

18 messages,  Last post on Apr 04, 2009 at 7:53 PM

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

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#11 of 18 Re: 1999 F150 AXLE RATIO [gasa765] by wpalkowski Mar 16, 2007 (3:18 am)
Replying to: gasa765 (Mar 15, 2007 9:49 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 18 5.4v8 with 3.31 axle ratio by gregkay Mar 28, 2007 (12:21 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 Replies to this message: want2go2 (Jul 17, 2008 7:42 pm)
#13 of 18 5.4 is much better engine than the 4.6 2v by mschmal Mar 30, 2007 (9:47 am)
It has vari-valve timeing, electronic throttle. this gives comparable gas milage.   Mark.
#14 of 18 Rear End Switch for 92 F350 by lphilips Nov 15, 2007 (11:40 am)
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 18 '72 F-350 long wheelbase by cayoterun Jan 21, 2008 (7:44 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 18 Re: 5.4v8 with 3.31 axle ratio [gregkay] by want2go2 Jul 17, 2008 (7:42 pm)
Replying to: gregkay (Mar 28, 2007 12:21 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 18 towing ability of F150 by campman1 Jul 28, 2008 (9:30 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 18 Rear Axle Rebuild by snowbrdjnky Apr 04, 2009 (7:53 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.

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