Re: Gears gears gears...
in general for a daily driver, 3.73's are good w/ stick, 4.10's w/ automatics. as for gas mileage, you highway MPG will go down a little as you will be cruising at higher rpm's. as for around town, if you don't mash the gas on every light and let the torque push you along, you may not see any decrease in city MPG.
as for installation, unless you are fairly skilled in rears, i would consider having a good shop install it as a sub-par install will lead to rear chatter and headaches
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1990 GT,stock T-5,K&N w/o air silencer,March underdrives,FMS wires,timing@14*,PA Perf 130amp alt,Steeda Tri-Ax Shifter,Steeda adj quadrant/clutch cable/firewall adj,Centerforce II clutch,o/r x-pipe,Magnaflow SS catback,g-load brace, subframes,Bilstein struts/shocks,Autometer gauges, 136k and running strong!
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