moparviper
Full Access Member
Quick question. How do you power shift? Is it bad on our transmissions? Iv never tried it before and just worried if it'll hurt our transmissions. I have a 2004 rc 6 speed.
power shifting
- Thread starter moparviper
- Start date
powershifting (or no-lift-shifting) is the art where you don't let off the gas between gears... it's about breezing the clutch pedal just enough to disengage a gear and catch the next gear all before the revs hit the limiter and bounce, all while keeping your gas foot planted...
you can, and you will wear it out prematurely...
truth be told some of the better drivers don't see much, if any difference in times when powershifting vs. letting off the gas for a brief second...
you can, and you will wear it out prematurely...
truth be told some of the better drivers don't see much, if any difference in times when powershifting vs. letting off the gas for a brief second...
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I disagree, when done correctly it is smoother on the gears (no clash back and fouth). I' ve been power shifting since the mid 60's and have yet to ruin a transmission shifting. Go to the "racing section" and search "Trainman Shifting" , find the "Trainman shifting video", and it will give you and idea how smooth it can be done. I tried to post a link, but I'm not good enough on the computer, maybe someone can help.
JeffBoyette
Full Access Member
The problem with powershifting our stock trucks is the thick OE gear oil in it slows the syncronizers, the weak slave cylinders prevent fully disengaging the clutch with the shallow kick you give the pedal to quickly powershift, the stock shifter that has too much flex and play to accurately engage the gear, and the plastic shift cup bushing is garbage. Inexperienced racers trying to powershift, strong arm the transmission and it ****s it up and snaps shifter handles. Just a couple times grinding it will cause shifter rattle and put metal debris all in your trans. Bent shift forks will cause it to pop out of reverse. Do a search on that.
The slight resistance you feel when going from one gear to the next is the syncronizers spinning to try to match the speed of gears. If you slam through the gear before it has a chance to match the gear, you will bend the edge of the teeth and grind the edge of the syncro teeth off. Chew through enough of that, your gears will wear and you have an expensive repair.
[ame=http://www.youtube.com/watch?v=MgmxydwmtTg]Manual transmission how it works synchronizers - YouTube[/ame]
There is no doubt that trainman shifts quick. But youd be a fool to think being that aggressive on the transmission isnt hard on it. And like Dan said, your not going to notice a hundreth of a second if you can shift quick and properly to begin with. And keep in mind what your purpose is anyway. A couple hundredths of a second in the quarter is a few degrees or a few mph wind speed. Take it easy on your truck and you can race a day its cooler outside and not lock your self out of third because your syncros are toast because your slave isnt disengaging the trans.
Not sure what you meant by the clashing back and forth comment trainman, can you help me understand what your saying better?
The slight resistance you feel when going from one gear to the next is the syncronizers spinning to try to match the speed of gears. If you slam through the gear before it has a chance to match the gear, you will bend the edge of the teeth and grind the edge of the syncro teeth off. Chew through enough of that, your gears will wear and you have an expensive repair.
[ame=http://www.youtube.com/watch?v=MgmxydwmtTg]Manual transmission how it works synchronizers - YouTube[/ame]
There is no doubt that trainman shifts quick. But youd be a fool to think being that aggressive on the transmission isnt hard on it. And like Dan said, your not going to notice a hundreth of a second if you can shift quick and properly to begin with. And keep in mind what your purpose is anyway. A couple hundredths of a second in the quarter is a few degrees or a few mph wind speed. Take it easy on your truck and you can race a day its cooler outside and not lock your self out of third because your syncros are toast because your slave isnt disengaging the trans.
Not sure what you meant by the clashing back and forth comment trainman, can you help me understand what your saying better?
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RagunCajun
Full Access Member
But it sure feels fun:rock:
I'm sure mine will get hurt one day from all the missing of gears i do, but i didnt buy this truck to drive Ms Daisy around:burnout:
here's jerry's (trainman) video:
Trainman's Shifting Video video
and to comment on jerry's quote of "i've been doing this for 60 years... yet to ruin a trans..."
this person came on the forum saying from the get-go he's never done it, is it bad...
you and i both have already put trans's in our trucks and you know as well as i if we didn't go to the track in them that they'd probably have more life in them...
for a newbie racer to think he's not gonna screw it up, or wear it out prematurely, that would be poor advice.
however, i can say that i didn't put a transmission in my truck until 95k miles... and there's probably 300 track passes on that truck and lord knows how many street races... so done properly, yes, you can get a fair amount of miles on a trans without rebuilding...
it's fun, no doubt, but it's not cheap to rebuild, and having never done it, i may suggest a cheaper vehicle to practice it...
but what do i know...
Trainman's Shifting Video video
and to comment on jerry's quote of "i've been doing this for 60 years... yet to ruin a trans..."
this person came on the forum saying from the get-go he's never done it, is it bad...
you and i both have already put trans's in our trucks and you know as well as i if we didn't go to the track in them that they'd probably have more life in them...
for a newbie racer to think he's not gonna screw it up, or wear it out prematurely, that would be poor advice.
however, i can say that i didn't put a transmission in my truck until 95k miles... and there's probably 300 track passes on that truck and lord knows how many street races... so done properly, yes, you can get a fair amount of miles on a trans without rebuilding...
it's fun, no doubt, but it's not cheap to rebuild, and having never done it, i may suggest a cheaper vehicle to practice it...
but what do i know...
Does that mean you are buying Prof's truck?
To the OP: Hot rodding anything will shorten it's life expectancy. If you bought your truck hoping to get 150k problem free miles out of it, I suggest babying it. If you bought it to enjoy it, well then power shift away.
Most of us lift between shifts. None of us have better timeslips than Trainman.
Thanks Dan for the video link. And I'm not that old! (been doing it for 60 years)....I said since the 60's as in 1964 (senior year) , so only 48 years. And you're right, the original poster should take it easy....and all of you just leave the shifting to me. Happy Birthday to me, I'm 66 today! Social Secuity checks start next month....yeah....a little extra each month, so I'll start saving for heads and cam........Look out NA Record!
HAPPY BIRTHDAY, JERRY!!!!!
Good points....I'm not a mechanic.....so I'll just stick to driving.....and the less I know the better.....or I'll be afraid to drive the way I do. By clash back and fourth....you know when you get on an off the throttle...the slight clunk or driveline slack... I just think it's better to maintain forward momentum and not let off each time I shift....but that's just me and the way I learned to race. It works for me.
you can't say better timeslips when you don't have equal trucks... i'd like to compare shift times, if that's possible... that would be interesting...Does that mean you are buying Prof's truck?
To the OP: Hot rodding anything will shorten it's life expectancy. If you bought your truck hoping to get 150k problem free miles out of it, I suggest babying it. If you bought it to enjoy it, well then power shift away.
Most of us lift between shifts. None of us have better timeslips than Trainman.
I'd like to think I can bang gears pretty well with lifting between shifts. Plus I feel more comfortable that way. I have a few helmet cam views on my youtube where you can get a good idea of what it looks like.
Link to your Youtube account?
It's very possible. Basic 1/4 mile apps like "Dynolicious" allow crude data-logging of shift times. All you would need to do is compare one of your graphs to one of Trainman's.
How long could it possible take to call and say, "Hi Professor? This is Viperhauler. I'll take it."?
about 45 seconds
you just stfu for a bit!... stop trying to make me spend my money!
See how you are? You and Prof "are still communicating" and I have to "STFU".
I still say you should buy it, though.
I would like to post it, but it won't let me because there is a banned word in the address. If you search Andy Sav it will be near the top.
here's a vid... you all can look through the rest...
[ame]http://www.youtube.com/watch?v=lxsOCrHhW50&feature=plcp[/ame]
it's funny... in the link, it has fA g in the title and vtcoa is putting *** in place, that's why the link won't work... lol
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Thanks. I'll export the sound from that video, sound from one of my videos, and sound from one of Trainman's videos, into Garage band. Then I can measure the length of time for each shift.
VENOMOUS1 RACING
Has Left the Room - Banned from VTCOA!
Listen to the Venomous Quad Cab rip through the gears. YOu distinctly hear all gear shift and fast
[ame]http://www.youtube.com/watch?v=wH1ACeHYrAg&feature=g-upl[/ame]
[ame]http://www.youtube.com/watch?v=wH1ACeHYrAg&feature=g-upl[/ame]
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Awesome, I'm interested to see how much improvement I need.
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