My 1999 F150 4x4 went from average mpg,city 15 mpg and highway 17.5 mpg to 11.5 city and 13.4 highway. Please help, all service has been done on regular schedules. 43 K miles. It fills like I have lost torque,I had the dealer check the trans, it check out ok. I think maybe the limited slip is locked, Would this make the sudden change in mpg. Does any one have any suggestions.

1999 F150 XLT 4x4 5.4, 17" automatic
Amazon Green,
Bed liner,Side steps, Euro head light covers.


[This message has been edited by Somar69 (edited 03-24-2001).]