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Ford Mustang II 8.8 Rear Axle Swap Install Steps 15-21 - Mustang Illustrated 1990
Step-by-step service procedure page with numbered photos covering axle, suspension, and driveshaft installation.
This is page 33 from the December 1990 issue of Mustang Illustrated magazine, documenting the final steps of a rear axle swap installing a Ford 8.8-inch rear axle under a Ford Mustang II. The page contains numbered photo captions 15 through 21 covering: installing a new breather vent (Toyota part # 90930-03031, about $5.00); fabricating a new brake line clamp hold-down by welding ¼-inch bolts to the axle since the original four-link bracket was cut off; replacing factory spring pad retaining pins with Grade-8 Dorman 5/16-inch pins (clamping the leaf springs first for safety); pressing out old shock absorber pin bushings and installing new ones from Boughn's kit; removing the Mustang II's removable shock brackets to install new Monroe Gas-Matic shocks (p/n 5889); and finally sliding the 8.8 axle under the car. Body text notes that Boughn and assistant Tony Noto completed the whole installation in five hours, with remaining tasks being driveshaft fabrication and brake line hookup, adjustment, and bleeding. A full-height outline diagram labeled "3/16" Steel" provides a template shape, presumably for a fabricated bracket used in the swap.
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Frequently asked questions
- What breather vent is recommended for the Mustang II 8.8 axle swap?
- A Toyota 4x4 breather vent, part number 90930-03031, which costs about $5.00.
- What shocks were used in this Mustang II axle swap?
- A set of Monroe Gas-Matics, part number 5889, installed after removing the Mustang II's removable shock brackets.
- What pins replace the factory spring pad retaining pins?
- Grade-8 Dorman 5/16-inch pins. The article advises clamping the leaves together before removing the original pin as a safety precaution.
- How is the brake line secured after the original four-link bracket is cut off?
- A new brake line clamp hold-down must be fabricated; a quick method is welding a pair of ¼-inch bolts to the top side of the axle.
- How long did the axle installation take?
- Boughn and assistant Tony Noto completed the whole installation in five hours, though the article notes it may take longer depending on your mechanical skills.
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