factory gear?

Welcome! 2.73...tough to get "out of the hole" with gear like that. Go with 4.10s, daily driver or not.
BTW, you can verify this by jacking the rear end up, marking the tire at 12 o'clock and marking the driveshaft. Then give the wheel a rotation (noting your 12 o'clock position) and count the driveshaft revolutions. 2 and 3/4 revs will verify the 2.73 you should have.
 
98 mustang GT said:
I have a 98 GT and i was wondering what gear it came with from the factory?
Is there anyway I can check? Its a 5-speed

Welcome to the Boards. Here's a gear calculator you can use to figure out what gears you have.

http://www.differentials.com/calc.html

If you know your tire size, you can use the calculators to tell you what RPM's you should be turning at various speeds with different gear ratios. Then confirm it by driving at that speed and takeing a read on the tachometer.
 
this is all it said:


World Automobile Identifier

1FA Ford, USA, passenger car

Vehicle Restraint System Type Code

F Active safety belts all positions, second generation air bags

Vehicle Line, Series, Body Type (for Passenger Car)

P45 Two-door convertible, GT

Engine Displacement/Number of Cylinders

X 4.6L, EFI (SOHC), eight cylinder

VIN Check Digit

1 The VIN Check Digit. Always 0-9.

Model Year

W 1998

Assembly Plant Identifier

F Dearborn, Michigan (USA)

Production Sequence Number

249616 This Mustang was the 49616 made for model year 1998.


Thanks