1987 differential change
#1
1987 differential change
anyone have any exp. with gear change to increase fuel milage and lower rpm....running 4.10 w/turbo and getting 15 mpg at best...3200 @ 70mph....considering change rear gears to 3.08 or probably 3.55 also runs terrific but use a quart to 1000 miles...how about a reply someone thanks
#2
1987 differential change
I changed my 87 F250 6.9 with ATS turbo from 4.10 locker to 3.54 locker, I now turn 2900 rmps at 75 mph. I have 215 75R 16 DRW tires on it. It help my fuel mileage a little, but I am still trying to make it better. My problem is I like to keep it up there on speed. With the other gear ratio, the engine struggled to keep up on highway speeds. I now have no problem cruising at 80
Dave
<a href="http://members.aol.com/deleontow/auto/index.htm">http://members.aol.com/deleontow/auto/index.htm</a>
Dave
<a href="http://members.aol.com/deleontow/auto/index.htm">http://members.aol.com/deleontow/auto/index.htm</a>
#5
Thread
Thread Starter
Forum
Replies
Last Post
frydaddy56
1987 - 1996 F150 & Larger F-Series Trucks
3
06-01-2010 04:45 AM
Cowboy34
Clutch, Transmission, Differential, Axle & Transfer Case
17
05-17-2006 01:46 PM
New To Ford
2004 - 2008 F150
6
02-14-2006 10:52 AM