How to Manually Shift an Automatic
#11
Originally Posted by jr's3800
The PCM, Cars computer controls the 4T60-E... All of the upshifts and down shifts are controled as so... If you left the trans in first and floored it the PCM would shift into second for you no matter what... If you don't wear out the trans first, you may wear out the Trans Range switch leaving the PCM wondering what gear you have selected... These transmissions are not built for abuse, they are intended to be a gennerally nice shifting trans that will do a good job over the course of its life, and tow a little behind you...
The only thing I can see happening is the trans wearing out early on...
The only thing I can see happening is the trans wearing out early on...
Although the feeling was the car was quicker by doing this, I don't think it really was. I believe it was more wishful thinking than anything.
#12
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While we are on this...
Gordy, Have you ever heard of something called Maximum Adapt Long Shift ? Its a code that can be set by the PCM... But I have yet to ever see it or hear of it... It will never set off the SES light either...
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Gordy, Have you ever heard of something called Maximum Adapt Long Shift ? Its a code that can be set by the PCM... But I have yet to ever see it or hear of it... It will never set off the SES light either...
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Originally Posted by SSsuperchargedEi
real manual transmission > fake manual transmission
in these parts, we call people that drive their automatics like they're manuals 'Ricers'
in these parts, we call people that drive their automatics like they're manuals 'Ricers'
#17
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Pontiac determined what the optimium shift points are for performance, reliability, and smoothness. The computer controls the shift and does it faster, and controlled.
Unless you've got lots of test equipment, a PCM ROM writer...
Unless you've got lots of test equipment, a PCM ROM writer...
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Originally Posted by jr's3800
The PCM, Cars computer controls the 4T60-E... All of the upshifts and down shifts are controled as so... If you left the trans in first and floored it the PCM would shift into second for you no matter what...
Shawn
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I don't have 1st gear [I am believing it to be because my vacuum modulator was malfunctioning], so if I want to accelerate, I have to put it into 1st. Otherwise it starts off in second, or some hybrid gear. Not quite sure, but I always thought the car was that slow accelerating, until the transmission kept shifting between 2nd and 3rd every 5sec [thanks to a loose coilpack], so I just manually shifted her, and discovered the amazing 1st gear torque of my baby. If I fix the 1st gear problem, I will probably just leave her in OD [D still has TCC lockup, but just no overdrive]. Not quite sure why it damages a tranny, or how? You guys say it can damage a tranny that has electronic shifting, well I have hydraulic shifting.. what about me?
-justin
-justin
#20
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Did this one day also, until the next morning I got the feeling I should read up about it first, found the page where it said lower fuel economy, and never did it again. haha. And there'* no way it can be good for a tranny when you manually shift an automatic car. Just to reiterate that for the 40th time