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ford 9" rear info ....great for swaps

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ford 9" rear info ....great for swaps Empty ford 9" rear info ....great for swaps

Post  bruno December 30th 2009, 8:46 am

All of the following has come from various sites:

These measurements are from flange to flange. Subtract 5" for bare housing length.

65-66 Mustang 57.25 inches
67-70 Mustang 59.25 inches
71-73 Mustang 61.25 inches
77-81 Versailles 58.50 inches
74 Maverick 8" 56.50 inches
75 Mustang II 8" 57.00 inches
67-73 Mustang, Torino, Ranchero, Fairlane 9" 59.25 inches to 61.25 inches
57-59 Ranchero and station wagon rears, 57.25 inches
66-77 Bronco 9", 58 inches
77-81 Granada/Versailles, 58 inches
67-71 Comet, Cougar, Mustang, Fairlane, 59.25 inches
71-73 Mustang, 61.25 inches
64 Falcon 58 inches
67 Cougar 60 inches
67 Fairlane 63.50 inches (coil springs)
72 Ford Van 3/4 ton 68 inches
73-86 65.25 inches
57-59 Ranchero and station wagon 57.25 iches (narrowest 9" housing)
66-77 Bronco 58 inches but has 5-on-5 1/2 inch diameter bolt circle
67-73 Torinos, Rancheros, Fairlanes 59.25 inches or 61.25 inches
67-71 Comets, Cougars, Fairlanes 59.25 inches

Where to find the 9" rear axle

67-73 medium and big block Mustangs and Cougars
66-71 Fairlanes, Torinos, Montegos, Comets, and other Ford intermediates
with big blocks
57-59 V8 Fords and Mercurys
77-81 Lincoln Versailles & Trucks

Type of 9" axle housings

67-73 Mustang/Cougar - light duty, thinnest housing material, small axle
bearings, 28 and 31 splines
57-68 passenger car and 1/2 ton truck - medium duty, stronger than Mustang
type, 28 and 31 splines
Ranchero/Torino - heavy duty thick wall housing, 3.25 inch diameter axle
tubes with flat tops
69-77 Galaxies (coils), Lincolns (coils), and late pickups (leaf)- 3.25
inch diameter all the way to the backing plate, coil housings have upper
control arm mount

How to recognize 9" housing centers

57 - no dimples, flat center band up the center of the rear cover, bottom
drain plug
58-59 - two dimples on back of housing, flat center band, some had drain holes
60-67 - two dimples, flat center band, oil level hole in back cover
63-77 Lincoln, LTD, Thunderbirds had 9.375 inch centers, housings were cut
away at the gasket surface for ring gear clearance, one curved rib at the front
top portion of differential. Strong, but no gears.

Types of 9" Axles

28 spline axles cannot be shortened and resplined (they're tapered)
Some can: 69-73 Mustang and Cougars have a straight 28 spline axle.
72 and earlier 31 spline axles have the ability to be shortened
73 and later 9" (big cars) have a 5-on-5 bolt circle and the axles cannot be
shortened
67-73 Mustang axles identified by wheel flange:
oval hole - 28 splines two large holes and counter sunk center - 31 splines





Last edited by bruno on July 7th 2013, 8:33 am; edited 2 times in total

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Post  69F100 December 30th 2009, 10:47 am

Nick make a sticky for us it will make for good referance for some when looking for houseing and 3rd members
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Post  billandlori December 30th 2009, 12:18 pm

69F100 wrote:Nick make a sticky for us it will make for good referance for some when looking for houseing and 3rd members

X2, this is great info!!

Bill
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Post  Greg_P December 30th 2009, 12:33 pm

Just use that intel with a grain of salt..... Several of those sites are known to have inaccurate info on a few rearend dimensions and specs.

Greg
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Post  bruno December 30th 2009, 1:34 pm

Greg_P wrote:Just use that intel with a grain of salt..... Several of those sites are known to have inaccurate info on a few rearend dimensions and specs.

Greg

let me know which ones greg so we can delete them

thank you
nick

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Post  windsor July 6th 2013, 8:06 pm

Almost all of the above links no longer work. :-)
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Post  bruno July 7th 2013, 8:33 am

windsor wrote:Almost all of the above links no longer work. :-)

thxs , some of them were spam .... they are now deleted

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