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Forum: Engines and Drivetrain

01-08-2018, 06:24 AM

Replies: 16

Is the 5.4 underpowered?

Views: 3,709

Posted By boywonder

Please let us know if you are successful...

Please let us know if you are successful recalibrating the speedo.

I have a 2008 with 33s and 3.73 gearing. The speedo is off by 7 mph at 65mph; I've tried to use 1der's auto Enginuity OBDII...

Forum: Engines and Drivetrain

12-29-2017, 04:50 AM

Replies: 16

Is the 5.4 underpowered?

Views: 3,709

Posted By boywonder

it's all relative...... I have a 4WD 5.4L...

it's all relative......

I have a 4WD 5.4L with 3.73 gearing and 285/70/17's....it downshifts out of OD on grades and gets about 12mpg.....I'm happy with it.

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