Ford 9-inch rear ends
If you have a link to an article or web site that talks about nine inch rear ends, put the link here. If you want to write an article or a story about your experience with one, write it here. Hopefully, this will become a place that will answer all your questions on the nine inch.
 Alterations to the Ford 9 inch
In order to install a pre-load brace, you will have to build a strong fixture to hold the housing while you apply force to the housing ends. You can begin by purchasing 3" diameter x 1/4" or 3/8" wall tubing and cutting it into two six foot lengths. Cut a 16" X 16" square piece of 1/2 inch plate, place the center section over the plate and mark out the bolt pattern. Then after center punching the bolt hole centers, use the drill press to drill the holes to 7/16".
Mark out the center line of the two six foot lengths, measure equal distant 8 inches for the 16" x 16" plate to lay on the cross pieces. Measure the distance between the two parallel pieces, cut two pieces of 3" diameter round tubing to this dimension and weld it using a stitch method, so as not to warp the fixture. Cut two appropriate pieces of 2" x 3" rectangular tubing, measure out from the center line noted above to the axle flanges and weld in the two cross pieces. Looking closely at the U-bolt picture, notice how the two angle irons keep the axle tubes centered in the fixture and how the U-bolts are mounted through the clamping plate.
After all welding is completed, lay the fixture on a flat surface, shim as required, place the housing in the fixture, bolt down the center section, place the U-bolts over the axle tubes, put the pre-load brace in place, measure from the outside flange to the outside flange, record the measurement. Then turn down the U-bolts, which, in turn, will apply downward pressure to the axle tubes, re-measure from flange to flange, if the NEW figure is approximately 1/4 inch LONGER, start stitch welding the pre-load brace to the rear axle tubes. Watch the heat and watch for warping. Weld from side to side in small stitches. Let everything cool entirely before pulling out of jig, and you're done.
 Truss for strength
If you don't have the tools or skills to make the parts, check the parts resources below. Also, Ruff Stuff makes a truss to do the strenghtening part. The shaped outline is made for the nine inch rear, all you have to do is use the jig to torque the rear housing, then weld up the slotted portion and weld the truss onto the housing.
 Ford 9" rear end photographs
 Ford 9" rear end articles and information
- Ford Rear Axle Assembly Identification Stamped axle codes
- Ford 9" Tech
- 9" rear ends
- How to Identify some typical Ford Center sections
- 9-Inch Vs. 12-Bolt Rearend Comparison
- Ford 9 Inch Rebuild/Gear Setup
- Fabricate a 9” rear end for leaf springs using perches, etc. from an 8”
- Everything you've ever wanted to know about Ford 9 Inch Differentials!
- Removing a stuck center section
- Fixing 8" and 9" pinion leaks
- 9 inch info
 Suppliers and manufacturers of Ford 9" rearends and parts
 Related resources
- Ford axle ratio codes
- Narrowing a rearend
- Rearend identification
- Rearend removal
- Straightening a rear end housing
- Ford transmission forum