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Jeff Chambers · 01-06-2005, 07:51 AM

A gear swap will not void the car's overall warranty. If the swap was not done by a Ford dealership, then it will affect the warranty coverage of the rear end, but it will not affect the rest of the car's warranty.

One way you can determine the gear ratio is to jack up the rear end and rotate the wheel through a full rotation while counting how many times the pinion rotates.

01-06-2005, 07:51 AM	#2
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	Re: Gears question in my 03 Mach 1 A gear swap will not void the car's overall warranty. If the swap was not done by a Ford dealership, then it will affect the warranty coverage of the rear end, but it will not affect the rest of the car's warranty. One way you can determine the gear ratio is to jack up the rear end and rotate the wheel through a full rotation while counting how many times the pinion rotates. __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"