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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 3 of 3

#20 of 22 9" Ford Axle spline determination by spartan74

Apr 22, 2010 (12:20 pm)

I've got a older Ford axle with 9" third member in my project car. The current gears are 4:56's and I'm wanting to switch to a 3:50. My axles are the 28 spline style and I'm searching for a salvage yard third member with those gears. My salvage yard sells complete assembled rear end and doesn't break them down just to look at spline count because at that point they can't sell as a complete assembled axle.. They've got several Ford pickups with these older 9" rear ends but don't know which ones have the 28 or 31 splines. Is there anyway to tell, without dissasembly, which axles are in each P U ?
Because of different axle widths and bearing diameters I'm not sure if any would be interchangable with my axle tube..

#21 of 22 2002 f-150 rear end by higinbotham

Sep 16, 2010 (10:24 am)

my rear end locked up on my 02 f150 and it has the 3.08 non-LS gears in it and i was wondering if the rearend would work off of a 2000 f-150 with 3.55 gears in it and would everything bolt up the same

#22 of 22 3.5L with the 3.15 rear end by hackattack5

May 22, 2013 (4:14 pm)

I noticed that in the Ford forum some guys are reporting 27 to 28 MPG on the highway with super crew F150s with the ecoboost and the 3.15 gears. I am interested in this set up because I plan to tow nothing and would love the MPG from such a nice ride. Does anyone here at Edmunds have that set up? what is your real fuel mileage?

Messages Page 3 of 3

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