The Fox body Mustang originally came from the factory equipped with drum brakes in the rear (with the exception of the SVO and Cobra models). After replacing the main components for the rear drum brakes on this Fox body less than a year ago, the parts were already showing signs of wear and tear. Braking components are extremely important, and it’s crucial that every component involved is working to it’s highest capabilities. Knowing this, we needed to address these problems as soon as possible. We considered doing an overhaul on the current factory drums again, however after much time and thought, we didn’t want to wait another year and find ourselves stuck in the same situation.
This time around, we wanted safer, more durable, OEM-like quality components. To achieve this, we decided a full rear disc conversion was in order. We contacted the Fox Body experts at Late Model Restoration.com. They were able to hook us up with a new SVE Mustang 5-Lug Rear Disc 28-Spline Conversion Kit, PN SVE-2320CAK-B.
Why Do Drum Brakes Get A Bad Reputation?
At the end of the day, it’s a great investment performance-wise, but an even greater one for safety reasons. – Jonathan McDonald, Late Model Restoration
Drum brakes are also extremely notorious for losing braking power during spirited driving, which is one reason you’ll find they’re not ideal for performance applications – one of the biggest reasons why drum brakes receive a bad reputation. After a few hard applications, they begin to fade due to excessive heat buildup. This diminishes the effectiveness of the fluid and the shoes.
We spoke with Jonathan McDonald from Late Model Restoration. He commented that, “Upgrading from your factory drum brakes to a rear-disc conversion kit like this one is the most ideal situation for performance braking on the Fox body. The kit greatly increases the mechanical advantage by creating more leverage, which allows the car to brake more efficiently, and produces less heat. Keep in mind that when you swap to a rear-disc conversion kit, the rear of the vehicle is now able to perform braking duties a lot faster, thanks to the vented design of the rear discs, that generate only a fraction of the heat from the drums.”
SVE Mustang 5-Lug Rear Disc 28-Spline Conversion Kit
SVE Mustang 5-Lug Rear Disc 28-Spline Conversion Kit From Late Model Restoration
- (2) Black SVE Rear Calipers
- (2) StopTech Rear Rotors
- (3) Stainless Rear Brake Hoses
- (1) Master Cylinder
- (1) Master Cylinder Adapter Kit
- (1) Proportioning Valve Plug
- (1) Adjustable Proportioning Valve
- (2) Rear 28 Spline Axles
- (10) Lug Studs
- (2) Rear Caliper Flange Kit
- (2) Parking Brake Cables
- (2) Cable E-clips
- (2) Bottles Royal Purple Gear Oil
- (1) Bottle Friction Modifier
- (2) Bottles Brake Fluid
- PN SVE-2320CAK-B
The calipers are single piston and are black powder-coated to resist all types of corrosion. The kit utilizes StopTech Performance street pads paired with the discs, and the parking brake cables directly replace the factory ones with no modifications needed – another nice advantage of using SVE.
Installing The Kit
To begin, drain the rear-end to install the new axles. Set a drain pan under the differential housing, then remove nine out of the 10 bolts holding the rear differential cover to the axle housing. Loosen the tenth bolt, allowing the cover to become loose, and drain the old gear oil into the drain pan.
Proceed by removing the entire factory drum brake assembly by removing the four nuts holding it to the factory axle flange. Once removed, install the new caliper mounting bracket provided. With the provided studs installed on the new axles, install the new axles, and secure them with the c-clips that were removed.
Reinstall the cross pin, being careful not to over-tighten it. When reinstalling the differential cover, we recommend the use of Room Temperature Vulcanization Silicone (RTV) to insure a proper seal. Once the differential cover has been put back on, fill the differential with the provided Royal Purple gear oil from the kit. Now is a good time to check if the axle seals and bearings need replacing.
After everything above is completed, we recommend removing the lower rear shock bolt, as it makes installing the brake hoses easier. Attach the new brake hose to the fitting on the caliper using the provided hardware, then reinstall the lower bolt.
Lines, Hoses, Valves, and More
With the factory union valve located on driver’s side inner of the fender, be aware that you will need to modify the stock proportioning valve (as explained above) to compensate for the new amount of fluid pressure from the new Cobra brake master cylinder. The new gutted valve allows you to make adjustments for the proper braking bias for the disc brakes, as the factory valve was designed for use on drum brakes.
We chose the ’94-’04 style because it means the enthusiast won’t have a hard time finding replacement parts in the future. Another advantage is that any aftermarket big brake kit from that era can be used as well. – Jonathan McDonald, Late Model Restoration
Our initial expectations for the kit were high, and we were very happy when Late Model Restoration met those expectations. When we asked McDonald what makes the kit perform so well, he replied with, “The kit features a vast majority of upgrades over the stock rear-drum setup from the factory. SVE uses ’94-’04 OEM Cobra-style brake rotors and calipers, which means any brake rotor or pad that era will fit this kit. We chose that platform because it means the enthusiast won’t have a hard time finding replacement parts in the future. Another advantage is that any aftermarket big brake kit from that era can be used as well.”
Our new rear-brake setup stops a lot more reliably and efficiently. We’re impressed with the performance this kit delivers, and we’re happy with the new appearance on our car. We couldn’t be any happier with the new brake setup on our Fox body.