2001 f150 superchip
#1
#2
I tried some transmission changes and went back to stock. For the tires, you can either go to Tire Rack and read the specs for that size or just measure the height with a tape measure which is what I did. I really like what the superchips did for my 02. I checked the speedometer against my garmin gps and they agreed.
If you don't know what gear ratio the rear diff is, look on the tag on the diff cover or look at the code on the door jam sticker.
If you don't know what gear ratio the rear diff is, look on the tag on the diff cover or look at the code on the door jam sticker.
#5
#6
No, the programmer is used to correct the computer for different ratios and tire sizes so the speedometer/odometer is accurate. The computer is programmed for the ratio and tire size it left the factory with. This also affects transmission shifting as it uses the speed input as part of its programming. Think about it - how can a programmer physically change a gear ratio?
Bottom line, when programming use the actual gear ratio you have, and experiment with tire sizes till the speedometer is about 1 or 2 mph higher than a GPS at around 60 mph. If you use a smartphone with an internal GPS you may need an app to read out speed.
Bottom line, when programming use the actual gear ratio you have, and experiment with tire sizes till the speedometer is about 1 or 2 mph higher than a GPS at around 60 mph. If you use a smartphone with an internal GPS you may need an app to read out speed.
#7
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#11
First Gear Ratio (:1)2.84 (2.84 min/2.84max)Second Gear Ratio (:1)1.55 (1.55 min/1.55max)Third Gear Ratio (:1)1.00 (1.0 min/1.0max)Fourth Gear Ratio (:1)0.70 (0.7 min/0.7max)Reverse Ratio (:1)2.33 (2.33 min/2.33max)Transfer Case ModelWarner 44-06 Transfer Case Gear Ratio (:1), High1.00 (1.0 min/1.0max)Transfer Case Gear Ratio (:1), Low2.64 (2.64 min/2.64max) and it is a 4x4
#15
Okay - H9 is a 3.55 limited slip. Stock tires are 30", yours are 34.5".
4.10's will put it back to the equivalent of stock, but the bigger tires are also heavier and have more rotating mass and wind resistance, so 4.10's won't get you back to stock performance.
So, you need the next step up, which is 4.56, to give you more punch off the line. Your city gas mileage may improve, but highway mileage probably won't.
With a 4x4, you are looking at $1500+ to do both axles. If you only do the rear, you can't use 4 wheel drive and you should pull the front driveshaft to avoid problems.
4.10's will put it back to the equivalent of stock, but the bigger tires are also heavier and have more rotating mass and wind resistance, so 4.10's won't get you back to stock performance.
So, you need the next step up, which is 4.56, to give you more punch off the line. Your city gas mileage may improve, but highway mileage probably won't.
With a 4x4, you are looking at $1500+ to do both axles. If you only do the rear, you can't use 4 wheel drive and you should pull the front driveshaft to avoid problems.