Time and time again people ask if it is difficult to install a set of gears in their Mustangs. Especially the 8.8 variety. Well if you pick up the lastest issue of 5.0 Mustang & Super Fords, there on page 92 is a very good illustration on how it is done. Titled Booty Overhaul, they install a new rear gear along with a Torsen T-2 differential. Carefully examine all of the photo's and pay attention to the tools required and method of how it is done properly. It's all reletive to experience and equipment, I'll let you readers be the judge of that.
Another interesting story is that they dyno a bone stock 93 Mustang and install a supercharger with everything else that should go with it and post the results. Then they take it off and do a step by step build up of a N/A set up. They start with the basics and record every install with a dyno reading. Some of the facts had me thinking of how to attack my own engine. Some im glad that they have done the leg work for me.
As with any project, I always try and get as much information as I can before I get knee deep into it and get all fustrated. It is nice to know what the HP and torque gains are for specific add ons. Then there's the hidden horsepower in the tune up of you ECU.
As one racer's quote states " the trick is in the tweak"
I read all those articles too, but since the biggest thing I've ever done to a car is change the rotors, I'll let someone else install my gears. Good articles though.
Gears are left to the pros. As for the 5.0 article on piece by piece installation and horsepower gain per piece, I thought it was a load of crap the order they installed items. Putting on the larger MAF last, what's up with that? Did C&L pay them to do that? You would've seen larger gains from the heads or intake if they'd put the TB and MAF on before the intake and heads. I've lost some respect for that MAG! The first install was the rockers? 99% of people will replace the throttle body/MAF, then exhaust. This frees up the power that the stock motor has. Also underdrives. Then they go internal with heads, rockers and fuel. I was disappointed.
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302, E303 cam, 1.7 Crane rockers, Edelbrock 6037 heads, Pro Products Typhoon intake, 75mm MAF, 70mm TB,155 lph pump, 30lb injectors, Paxton Adj. Fuel Reg., Underdrives,Mallory Dist., Mallory Pro Master Coil, BBK headers, Ford Racing 3.73 gears, no cats, 4" sidepipes, Ford Racing Super Duty T-5 trans. 2100 lbs.
Gears are no big deal. If you can change your clutch you should be able to install your own gears and save lots of $$$. Research the process before you dig in.
How to install rear end gears, and more! read on. 
