Automatic Manual shifting? - Mustang Evolution

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Old 06-11-2014, 07:35 PM   #1
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Automatic Manual shifting?

does shifting manually in an automatic 04 GT harm the trans? I cannot find a straight answer!
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Old 06-11-2014, 08:00 PM   #2
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Same goes for me man ive heard yu can **** it up since bein an auto its meant for auto n not manual shifting but ive seen couple my friends do it but i myself havent tried it for same reason afraid of messin up my tranny
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Old 06-11-2014, 08:20 PM   #3
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Down shifting, unnecessarily, can be hard on it but I don't see any harm in up shifting, other than it being completely unnecessary and is defeating the purpose of having an automatic transmission in the first place.
The computer knows the perfect time to shift practically every time...
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Old 06-11-2014, 09:44 PM   #4
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The computer knows when it WANTS to shift every time.

Like someone else said, downshifting it is harder on it, but upshifting isn't bad. Think about what those gears are there for- low speed keeping it in gear. Using them up is fine. Will downshifting kill it? Probably not, most definitely not immediately. Is it good for it? No way.

Sorry that's not clear cut, but I'm not an engineer- just experience doing the same thing. Upshifting went fine, and using it for more go has been fun, but downshifting in an auto has always felt like I am hurting it.

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Old 06-11-2014, 09:56 PM   #5
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I wouldn't with the stock valve body or the stock shifter, not regularly. If you want near free performance out of your 4R then J-Mod it. Look it up on youtube. Then get a tune to give you some more aggressive shift points.
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Old 06-11-2014, 10:26 PM   #6
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I down shift to second all the time, but I also have a Fairbanks shift kit and red eagle clutches and a b&m cooler. I also have the b&m ratchet shifter witch definitely helps you incase you miss second and by accidentally go in to first. I alway give the tranny input power weather I manually shift it up a gear or down, even if it's just a little throttole input it will help the transmission. I never shift down into first even at slow speeds, I only down shift in to second and it seems to be fine still. The shift kit was definitely a good investment though. Not many automatics can cherp gears. Some guy tryed telling me how shiftkits hurt the transmission. Compeletly false, shift kits reduce slippage and reduce heat.

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Old 06-12-2014, 12:44 AM   #7
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+1 shift kits are good, however automatic is automatic, just smash the skinny pedal...it'll know what to do

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Old 06-12-2014, 01:32 AM   #8
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My friend has a auto silverado, when he leaves it in drive it's a full second slower in the 1/4 mile than when he shifts it. But who knows.. It's a chevy.
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Old 06-12-2014, 09:44 AM   #9
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When I shift it manually it's 0-60 is faster

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Old 06-12-2014, 07:39 PM   #10
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Had a buddy years ago that had a 98 gt vert w/ auto trans. He drove like this, after about 4 months his trans was shot. No idea if it directly resulted in the demise of the trans as the car was bought used, but as someone mentioned doesn't it defeat the point of having an auto. I understand the occasional manual shifting in an auto but I would think regular shifting like that would hose it just like my buddies

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