I have a 1993 f150 4x4 with automatic locking hubs, i want to switch to manual locking hubs. How much of a gas mileage difference will there be from switching to manual locking hubs.

 

I don't imagine you'll see any difference in gas mileage from making the switch. Auto hubs are not locked unless your front axle is engaged, meaning under regular driving conditions your front axle turns just as freely as a manual hub in the "unlocked" position.

Switching to manual hubs will make your axle far more reliable but won't change you mileage at all.

 

No change. As long as you unlock them when your not using them.

 

even if it is locked it really shouldn't make too much of a differnce....it's not like you are pulling a trailer! I would be more concerned with drivetrain wear and tear!

-jason-

 

True on that Jason. Mine are locked all the time and I don't notice any difference in my mileage from when I used to run unlocked.

 

you don't count Ivan, 460's suck on gas mileage any way you turn! just like me!

-jason-

 

What are you talking about? Hubs locked I could have gone from 2MPG to 1.

PLB, go ahead and do the switch. You'll thank yourself for it later as the manual hubs are far stronger. Don't mind us any.

Btw, welcome to FTE.