Understanding Tunes - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 02-24-2009
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Understanding Tunes

since nobody answered the post i decided to make a thread.

a stock auto ranger with a tune, towing, performance, whatever tunes are available, are able to get better shift points, but what exactly are you doing?

i mean are you basically lagging the computer? not letting it upshift and keeping the governor pressure steedy or what. kinda confused i know its pressure control but how is the new tune controlling the Throttle and Governor Pressure diff then oem.

wouldnt this cause more wear on the convertor since you are not letting it shift therefore causing more heat then stock.

Has anybody messed with stall at all? any convertors out there for performance for us 4-banger guys that youve seen that would work well with these tunes?
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Old 03-12-2009
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nobody at all?
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Old 03-12-2009
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all the tune does is modify the parameters inside the computer that controls the shift solenoids which control what gear you are in
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Old 03-12-2009
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It's all computer controlled. You can program it to never leave first gear. You can change the upshifts at WOT, you can change the shift pressures to firm them up, you can change how/when the torque converter locks, you can probably change the downshifting or upshifting based on TPS and engine load, etc.
Not are tunes are equal, you definitely want to find someone who knows what they are doing and has done many of the same transmission.
James Henson did a great job with my sport trac (5r55e). But when he tuned my F150 the shifting was horrible, way worse than stock. After 3 or 4 different tunes they are improved, but I'm still not happy with them. I got tired of the back and forth with emails and phone calls to try and fix it. In his defense he did make a good effort but I wouldn't recommend him to someone with an F150. Some day I will get new tunes from someone with more experience with F150's.
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