Ford 9-inch Rear End Data
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The information on this list was compiled by members of the Fairlane / Torino / Ranchero Mailing List. If you encounter any incorrect data, or have additional information about Ford 9-inch rear ends, please e-mail webmaster@DFWmotorsport.com |
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Year & Model |
Axle Length |
Notes |
| 65-66 Mustang | 57.25 inches | |
| 67-70 Mustang | 59.25 inches | |
| 71-73 Mustang | 61.25 inches | |
| 77-81 Versailles | 58.50 inches | |
| 67-73 Mustang, Torino, Ranchero, Fairlane |
59.25 inches to 61.25 inches |
|
| 57-59 Ranchero and station wagon | 57.25 inches | |
| 66-77 Bronco | 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 Ford Van 3/4 ton | 65.25 inches | |
|
57-59 Ranchero and station wagon |
57.25 inches |
narrowest 9" housing |
| 66-77 Bronco | 58 inches | 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 | |
| 75 Mustang II 8" | 57.00 inches | |
| 74 Maverick 8" | 56.50 inches | |
Where To Find The Nine Inch 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
Types Of Nine Inch 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 Nine Inch 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 Nine Inch Axles
28 spline axles cannot be shortened and re-splined (they're tapered).
72 and earlier 31 spline axles have the ability to be shortened.
73 and later cars have a 5-on-5 bolt circle and the axles cannot be shortened.
67-73 Mustang axles can be identified by wheel flange:
Oval hole - 28 splines.
Two large holes and counter sunk
center - 31 splines.