Transmission Shifting - Ford Powerstroke Diesel Forum
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Old 02-18-2012, 09:17 PM
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Transmission Shifting

I drove my brothers duramax the other day and the transmission shifts so much quicker and smoother than mine in my 7.3L. Also my transmission shifts around 3000rpm and it sounds like the motors about to blow. I didnt know if there was anyway to make the transmission shift quicker or if it had something to do with the custom tunes that I have. If anyone knows anything or could help me out on this i would appreciate it alot. I know the basics of transmissions, but im more of a motor guy not transmission. I do have a built SunCoast transmission by the way. Thanks!
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Old 02-19-2012, 04:42 AM
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Does it shift at 3k WOT or all the time?
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Old 02-19-2012, 05:01 AM
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It shifts at 3000rpm at WOT. If I do drag races this summer I would like for it to shift a little quicker when I put it to the floor and keep it there.
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Old 02-19-2012, 05:37 AM
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Try lifting off the loud peddle when you want it to shift.
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Old 02-19-2012, 05:41 AM
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Thanks ill try that. Would a suncoast transmission controller let me change the way it shifts to however i want? Or are they even worth the money?
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Old 02-19-2012, 05:58 AM
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Having a built trans usually means converter upgrades. An upgraded converter locks up sooner, that and your chip prob increases line psi. Letting off the throttle will unlock your converter and allow it to shift. Idk about the trans controller, never used one. Your custom tunes prob have shift points built in. Whos tunes do you have?
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Old 02-19-2012, 11:45 AM
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Wagner Performance.......hes strictly powerstroke and has been working on them since he was 16
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Old 02-19-2012, 06:36 PM
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With the chip, and the line pressure your stock trans is going to shift a bit more sluggishly than the duramax. What is the age difference and mileage differnce between the two trucks? When I got my built trans a few months ago, I must say the difference is phenomenal, its a night and day swap. If you want a drastic change in shifts send your chip back and tell them you want the shift points on x tune changed.
~Phil
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