I HAVE A 2000 F-150 4.6 V8 EXT CAB 8FT BED AND A 355 REAR END GEAR, FOR FUEL MILEAGE REASONS
WOULD YOU RECOMMEND REPLACING THE 355 WITH A 308 GEAR? WHAT IS THE DOWN SIDE OF CHANGING TO A 308?
have the same problem?
Tuesday, January 2nd, 2007 AT 6:21 PM
Less high speed power and low end power, other then that not really.
Saturday, January 5th, 2008 AT 8:32 PM
If I was you I would leave the 3.55 gears in because your not gonna gain anymore than a couples mpg's but lose alot of bottom end
Wednesday, January 16th, 2008 AT 6:03 PM
I second that. Your engine will generally turn at a lower rpm. Do a lot more lugging if you go to 3.08's. Keep the 3.55's and the engine will be a lot more efficient by running in it's optimum powerband. You'll have more power to the wheels and get better fuel economy.