Not happy w/shift pts---too high rpm. Can the dealer reprogram the computer to lower them to my driving preferences???

 

Sorry...guess it would help to know I have a 99 F150 w/4.6, A/T, 3:55 LS, 2WD.

 

check out the chip section on this board you can get a superchip and that will do exactly what you are looking for.

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99 F250 XLT LD 4X4 S/C,5.4,3.73 Limited slip,Bright red clearcoat ,4whl abs,remote start w/keyless entry and alarm,chrome rims,tinted,westin nerf bars,factory tonneau,superchip,K&NGen II fipk,pioneer in dash cd,pioneer amp,infinity kappas all around,Lund front runner bug sheild.Gibson split rear,stull SS grilles.

 

If you want to lower your shift points, a normal superchip will be of no help, they raise the shift point. Superchip could make you a custom chip though if you wanted. Your dealer will be useless when it comes to modifications. A lot of the dyno tuning shops have the ability to burn custom chips and one could easily do that for you.

I've got to ask, WHY?? The 4.6 is an overhead cam engine and it needs to turn revs to make power and is designed to do so. If you cut the top off its RPM range, you'll strangle it.

 

Ranger....I agree that under towing/highway conditions high revs are necessary and good even, but in city driving when you have to punch it even a little and it kicks down to low and revs, you have over-acceleration for your needs and if you let off to control it, the tranny lurches and upshifts, giving the appearance of hot-******* or whatever. Gas consumption goes up, as well as tire wear and then theres the cop angle. Don't need to catch their attention! Squalling tires puts money in their pockets, y'know. I just need to cut 1-2 shift points from where its at (approx 52K - full throttle) down to a quieter 4K - 4.5K perhaps. (I may even start driving my '94 Eddie Bauer w/4.0 that I recently traded my 65 Mustang for). My F-150 can't be beat for towing tho IMHO. Have to remind myself the bass boat is back there regardless of hills or anything. Oh well, I guess it's better to have a truck that runs too dang well than vice-versa, right people?

 

Try cleaning your MAF elements. One notorious auto trans problem is once the MAF gets dirty it miscalculates Load which is used to determine shift points.
Windex on a Q-tip and be VERY CAREFUL to clean the two elements in the sample tube.

birdman

 

Birdman.... Would MAF be dirty at 10K miles?
I assume MAF is Mass Air Flow sensor?

 

larrym. I had the exact same complaint, I was told it was normal. I also asked if it could be reprogrammed and was told YES but only with the SAME program so unless it was really screwing up it would make no difference. My guess is that because it's a OHC engine it develops it torque at a higher RPM so they have to allow it to wind up before shifting.
It is however and electronically controlled transmission; therefore, I would think, programmable.

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1999 Lariat Super Cab, S.B. 5.4L, 3.55 LS
and everything but the leaky slider window.
Bright red w/ gold 2-tone, Leather Captain's Chairs
Mods: Duraliner bedliner, Bugflector II, Hide-a-hooks.
& a leeetle chrome tip on the exhaust.

 

The shift scheduling is electronic and is programmable, but not by the dealer. It's a violation of federal law to change the shift schedule because the EPA has certified the calibration in your truck to meet the emissions laws. If you change it you no longer have a certified calibration.

You can go through all the arguments about a lower shift point making less emissions, and you may or may not be correct. The point is that it isn't a certified calbration so it isn't legal for the dealer to change it.

Since it isn't legal Ford took steps to make sure the dealers do not have a method of reprogramming anything except what is supposed to be in the vehicle.

Mark