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 The side gear tension pin...  The side gear tension pin is driven out next to free up the differential pinion pins and gears, also known as "spider" gears.  Differential halves are separated...  Differential halves are separated to expose side gears.  These are the differential...  These are the differential pinion and side gears. Two pinion gears are supported by the pinion pin, which is secured with a tension pin.  All 7 1/4-inch integral carrier...  All 7 1/4-inch integral carrier axle housings have a cast-iron center with casting numbers and a date code. This is a C5DW-4025-A casting. The casting date code is January of 1965, a month after Gary's Mustang rolled off the Dearborn assembly line, but as close as we could get it.  After pressure washing and...  After pressure washing and scrubbing the axle housing, Gil preps the surfaces before applying Eastwood's Chassis Black primer and paint.  Gary's 2.83:1 ring and pinion...  Gary's 2.83:1 ring and pinion were in perfect condition at 35,000 miles. Look for ring-and-pinion gear types stamped into the gears themselves. The 2.83:1 ratio has 34 ring gear teeth and 12 pinion gear teeth. Mustangs also had 3.20:1 gears with 32 ring gear teeth and 10 pinion gear teeth. The 3.20:1 ratio is more common with three-speed manual transmission cars.  National Parts Depot set us...  National Parts Depot set us up with brake lines and hoses. We chose galvanized brake lines for originality. Stainless steel may look terrific, but it is an extremely hard metal and can be hard to seal.  Our original Ford brake cylinders...  Our original Ford brake cylinders were sleeved and freshened up with new rubber by Mustangs Etc. They're as good as new.  Differential side gears are...  Differential side gears are installed along with pinions, getting a fresh coat of assembly lube and thrust washers. The roll pin will be secured with a tension pin.  All moving parts must receive...  All moving parts must receive a generous amount of assembly lube. Remember, rear axles run at high temperatures, up to 250-300 degrees, subjecting moving parts to extreme stresses.  The pinion pin tension pin...  The pinion pin tension pin is installed. Check your pinion pin for abnormal wear before reusing. New replacements are virtually impossible to find. Any reputable machine shop can make one from tool steel, but it won't come cheap.  Use a thread locker on all...  Use a thread locker on all fasteners to ensure security. Torque all fasteners to specifications outlined in the Ford Shop Manual.
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