Axle ratio and fuel mileage

Tiny
TAWOLFORD
  • MEMBER
  • 2000 FORD E-SERIES VAN
  • 126,000 MILES
What axle ratio would be the best for fuel mileage in my 2000 E150 AUT0MATIC OD transmission. I was thinking around a 3:08 it now has a 3:55.
would I have to advance my cam timing in my 5.4 engine or is it already advanced?
would I have to change my shift points in my computer?
any other information would be very much appreciated.
thanks tom
Monday, April 22nd, 2013 AT 8:33 PM

3 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
2.83 is a good rear for highway

Cannot change cam timing.

Cannot change shift points.

It is a big vehicle, not much more can be done

Roy
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Tuesday, April 23rd, 2013 AT 2:38 AM
Tiny
TAWOLFORD
  • MEMBER
  • 2 POSTS
I thought I could change my cam timing with an offset keyway? Thanks Tom
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Wednesday, May 8th, 2013 AT 9:06 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
No, leave it alone

roy
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Wednesday, May 8th, 2013 AT 4:47 PM

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