Mike,

I put you chip in a couple weeks back and had the first chance to really test it out on my trip to the mountains this weekend.

On a steep grade, under firm throttle I am still having a long delay upshifting from 2-3. To keep my speed on these hills if I run it up to 65 mph (approx 4500 rpm) and let off the gas a little I expect it to shift up but it doesn't until my speed drops down near 55 or so. If I hold the thottle down until it shifts up on its own near 5000 rpm, it is fine but I don't like it holding the shifts that long.

The weird thing is that I don't notice this on level or moderate inclines. It only seems to be on steep grades where the truck is working hard. Is this a Ford thing?

Fred

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97 F150 Lariat, Dark Torridor Red/silver, grey leather, extended. Leer running board, deflector, tonneau, bed liner, Superchiped

 

Dear Freds4by,

Actually, this sounds normal, especially since it's only happening on a steep grade. It's due to the rather severe engine load in that particular situation. Even after running it up to 65 and letting off the gas, the vehicle still maintains that strategy to give the power needed to get up the incline. In other words, today's computer controlled automatics act a bit differently than older automatics did, in that in this type of situation, they are not going to upshift immediately when you take your foot off the gas briefly; it sees how quickly teh speed drops off, and hence doesn't upshift until it senses that throttle demand has been reduced considerably for a period of time. It senses that it's been under a load for some time, as you go up the steep grade, and until something changes, I.E., the load as you crest the grade, you'll still see this behaviour.

The bottom line here is the amount of power available versus the load it has to work against. Anytime you're going up a "steep grade", "where the truck is working hard", you should expect this behaviour in that vehicle, as part of it's strategy to satisfy throttle demand vs. load.

Please feel free to give us a call if you'd like to go over this in detail.

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Mike Troyer
Performance Products, Inc.
National Distributor of Superchips
(540) 862-9515
Email: mtroyer@compuserve.com
Online Superchip ordering system:https://www.f150online.com/scpp/index.html

 

Thanks Mike,

I kind of figured it was a Ford thing. Your explanation makes sense especially since it shifts fine unless the truck is under The heavy load.

My wife who is the primary driver of the truck really likes the chip! I was surprised since she normally complains about spending un-necessary money. Maybe someday I'll have fun with her (after she really gets used to it) and pull the chip out and see what she says. Thanks again Mike!

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97 F150 Lariat, Dark Torridor Red/silver, grey leather, extended. Leer running board, deflector, tonneau, bed liner, Superchiped

 

You're very welcome, anytime!

Enjoy your Easter weekend,

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Mike Troyer
Performance Products, Inc.
National Distributor of Superchips
(540) 862-9515
Email: mtroyer@compuserve.com
Online Superchip ordering system:https://www.f150online.com/scpp/index.html