Yes
2 wheel drive, powering fewer components.
Assuming you mean fuel mileage, we need to know the year, the engine and if it 2 wheel or all wheel drive.
I have a 1997 GMC 1500 4 Wheel Drive. When engaging 4 wheel drive there is a popping noise (different than and in addition to the normal sound of it engaging) and it does not always engage. Then it will even have a popping noise once engaged. Any ideas? Thank you for your input. Stan
No it will not change the gas mileage, if it does it's like .5 mile per gallon at most
Yes, but it will increase wear on the front part of the drivetrain, and also might decrease mileage a little. I only lock the hubs when I might need 4wd in winter.
The 4 wheel drive is not engaging on your 1997 Ford F-250 because you have a bad actuator if it is a push button. If it is not a push button, it could be a bad hub or linkage.
The model year? Front wheel drive or all wheel drive? 4 cylinder or 6 cylinder engine? More info needed.
17 MPG.
There are several disadvantages to having a four wheel drive such as increased tire wear, lower gas mileage and an increased cost for maintenance of the vehicle.
Check the vaccum lines to the transfer case
Yes you do.
The hub actuaters