3.730-4.30
Guest
Joined: Nov 2004
Posts: 7,988
Likes: 55
From: north west new jersey
you also have to reprogram the pcm for the gears so it knows what it has. disconecting the battery here is not enough. if you already have a programer use it . input needed is gear ratio and tire turns per mile.then you will have your trans shift coreectly.
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Senior User
Joined: Dec 2006
Posts: 166
Likes: 0
From: upstate central new york
does this extend the trans rpm shift points or does this lower the rpm tranny shift points after you program the computer any help thanks
Last edited by 900rr; Dec 11, 2007 at 05:31 PM.
Posting Guru
Joined: Jun 2005
Posts: 1,268
Likes: 8
From: central Louisiana
hey CAP how ya been. good to read you on here again, hahaha!
i don't have the programmer but i run the super lift truspeed. to recalibrate for tire/gear swap. it works great i think. i've noticed alot of programmers only can recalibrate to a 35-36" tire...........wouldn't work for us running a 36+ tire.
even switching from a 38" tire to a 39.5 i used a gps to track MPH and reset the truspeed to the correct mph with a little screw driver (do not attempt by your self, hahaha). my wife held the wheel and i turned the screws to match mph's! after the recalculation i noticed everything in sequence more, crisper shift, and shifting at the right rpm. i got mine off ebay for $100 new. to me it's been better than a programmer.
i don't have the programmer but i run the super lift truspeed. to recalibrate for tire/gear swap. it works great i think. i've noticed alot of programmers only can recalibrate to a 35-36" tire...........wouldn't work for us running a 36+ tire.
even switching from a 38" tire to a 39.5 i used a gps to track MPH and reset the truspeed to the correct mph with a little screw driver (do not attempt by your self, hahaha). my wife held the wheel and i turned the screws to match mph's! after the recalculation i noticed everything in sequence more, crisper shift, and shifting at the right rpm. i got mine off ebay for $100 new. to me it's been better than a programmer.
Hotshot
Joined: Mar 2007
Posts: 10,101
Likes: 40
From: Pa
Originally Posted by 900rr
is it worth having it done to extend the rpm to shift points i do not want to be shifting early
With 4:30s over the 3:73s you may shift earlier in regular driving as well as WOT because the truck will move easier with the 4:30s. Monsta made a good point earlier, correcting the speedo only will still have the pcm thinking your running 3:73s. You can reflash the computer with the tuner for the 4:30s and the tuner will automatically make a shift point adjustment. I used my SCT to reflash for my 33's among other things and noticed the tranny will hold the gear slightly longer before shifting.
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Senior User
Joined: Dec 2006
Posts: 166
Likes: 0
From: upstate central new york
TOOK THE TRUCK to the dealer yesterday and they said that there computer could only program for tire size and not the gear change any help? I do not wish to tune this truck to have to run 93 oct. in it with a tuner. Also has any one ever used the banks tranny pak or there programer i saw it in one of the ads on the forum thanks
Thread Starter
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Senior User
Joined: Dec 2006
Posts: 166
Likes: 0
From: upstate central new york
there were some mixed thoughts about it on here so i tried it at the dealer it was ok they did not charge me so it did not matter
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