toad
Tue, June 1st, 2010, 10:55 AM
I just installed a phoenix in my 96 7.3 ps. The up shift from 3-4 is really slow. It feel like it gets hung up between shifts. Is this normal or something that needs a little adjustment. I pulled my jeep 320 miles each way this weekend. The extra power was nice But I seem to have lost a little fuel mileage.
every body talks about extra miles I am just unlucky or what
cleatus12r
Tue, June 1st, 2010, 11:39 AM
The 3-4 upshift is a concern for most every 95-97 truck and it has to do with the torque converter clutch strategy and valving in the transmission. It unlocks just before the 3-4 upshift and relocks about a second after the shift. There are mechanical fixes for this but it is up to the hardware and software that Ford uses. The extra power brings out the condition.
The mileage increases are usually only going to be noticed while running empty as it takes a specific amount of fuel to make a specific amount of power. The extra power you thought was nice for towing is taking a little bit more fuel.
Run it for a while empty and see what the mileage does.
toad
Tue, June 1st, 2010, 01:25 PM
Well that answered all of my questions. Thanks. Now the trick is going to be driving the truck empty.