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Discussion Starter · #1 ·
Ok I have a 2005 Ram 1500 with 5.7L hemi. I went a 14.77 on street tires with a 93 octane tune from my Diablo Trinity. I was only at 4200 through the traps and no traction off the line. I wanted to get closer to running under 14 so I put in an 8.75" rear-end I had with 4.86 gears, threw on some slicks & headers, and now ran a 14.02 yesterday at 96.7mph. Problem is that it is shifting into overdrive WAY to soon. Like around 5200 to 5300. I have turned the overdrive button on and off and it had no difference on the track. Overdrive kept coming in early. I found on the trinity where I can change the 1-2 shift point and the 2-3 shift point, but cannot find anywhere to delay the overdrive kicking in. There is no reason I should not be able to set the 3rd gear to overdrive change at at least 5800. What should I do? I should be hitting the 1/4 mile at about 5600-5700 in third gear and not a lower rpm in overdrive. Any help or advice would be appreciated. Also, I thought if there was not a way to change the overdrive shifting from the computer that I might be able to unplug an overdrive sensor on the transmission to physically/mechanically keep it from kicking in?
 

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I believe it has to be manually shifted to avoid the overdrive. hopefully chefred or kay9 will chime in and i'm sure they know for sure
 

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Discussion Starter · #3 ·
Yes, that is what someone else told me as well. I am a little nervous about doing that as I do not want to shift down, over-rev it, and damage the transmission. but I have also heard that repeated full throttle over-drive shifts are not good for the transmission either.
 

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Yep try to keep it out OD when going WOT as well as 2nd prime downshifts. 125k on my stock transmission and even though it is not a "track" vehicle so to speak she has quite a few mods to make her a little peppy.


Videos of hemiloredo03 in regards to locking 3rd gear during WOT. He is now running 11's on a stock block.
http://www.youtube.com/watch?v=fgPgAncpFfY&feature=related

http://www.youtube.com/watch?v=m6yr...DvjVQa1PpcFNqZ4-_T2V53QSrKP1UxnTythxD5ifDdzI=

http://www.youtube.com/watch?v=gJal...DvjVQa1PpcFNqZ4-_T2V53V2zDVm6v_ofp-D89PolPVc=

video of dline on stock block
http://www.youtube.com/watch?v=P1rIR4qduV4&list=UUQj8TFgO2VvNv369AfLEnaw&index=11&feature=plcp
 
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