Why does my automatic shift at 6,000 instead of redline?
03-21-2003 | 04:08 AM
#12
Cracker Quack!
Joined: Nov 1998
Posts: 659
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From: LI, NY
Yeah...I noticed my car stopped redlining lately...granted its a 4 banger 5th gen....
I suspect that the Tach's may not be very durable and accurate after a few years...why?
I did an experiment on my car manually shifting the auto. Every time I approached redline on the tach, but not quite redline, I hit fuel cut off...I did this for 1st, 2nd and 3rd.....
noel
I suspect that the Tach's may not be very durable and accurate after a few years...why?
I did an experiment on my car manually shifting the auto. Every time I approached redline on the tach, but not quite redline, I hit fuel cut off...I did this for 1st, 2nd and 3rd.....
noel
03-21-2003 | 10:14 AM
#13
Thread Starter
lots and lots of fail
Joined: Dec 1999
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From: Deeeeeeeeeeeeeeetroit
Originally posted by fizzbob7
i know most auto ecu's are programmed a little conservatively as far as the shifting a little early and the fuel/timing maps....all types of cars, not just hondas.....you take something with 150hp and usually bought for families, i guess they figure it will be safer on the engine....you can manually do it, but theres no real benefit....you can also get your ecu reprogrammed....mine shifts about 500rpms short of redline
i know most auto ecu's are programmed a little conservatively as far as the shifting a little early and the fuel/timing maps....all types of cars, not just hondas.....you take something with 150hp and usually bought for families, i guess they figure it will be safer on the engine....you can manually do it, but theres no real benefit....you can also get your ecu reprogrammed....mine shifts about 500rpms short of redline
I did some testing today...it redlines in first gear and shifts between 6250 and 6300, but in second it shifts at about 6050...I dunno. I guess second gear is mapped differently.
ASIMO, what the hell kind of a post was that? :eh:
Noel, maybe...but I think my tach is fairly accurate as it redlines in first but not second. From what it sounds like, your tach is off by a bit.
03-21-2003 | 08:39 PM
#14
Senior Member
Joined: Aug 2002
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From: H-A.net
Originally posted by 98CoupeV6
ASIMO, what the hell kind of a post was that? :eh:
ASIMO, what the hell kind of a post was that? :eh:
automatics come with a "rev limiter" on them so they dont over rev. most are set below redline. mind shifts at 6k instead of 6500.
03-21-2003 | 09:28 PM
#15
Senior Member
Joined: Mar 2000
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From: Southern NH
Maybe it's time for a new transmission. 
h:
Our TL never shifts at redline at 2nd gear, and sometimes not 1st either. It depends on what it's mood is, and how it maps the gears.
This should be normal. Check your tranny fluid as a precaution.
h:Our TL never shifts at redline at 2nd gear, and sometimes not 1st either. It depends on what it's mood is, and how it maps the gears.
This should be normal. Check your tranny fluid as a precaution.
03-22-2003 | 06:41 AM
#16
Thread Starter
lots and lots of fail
Joined: Dec 1999
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From: Deeeeeeeeeeeeeeetroit
Originally posted by ASIMO
automatics come with a "rev limiter" on them so they dont over rev. most are set below redline. mind shifts at 6k instead of 6500.
automatics come with a "rev limiter" on them so they dont over rev. most are set below redline. mind shifts at 6k instead of 6500.
First gear hits about 6250-6300, at or slightly past redline. Second gear does not. Must be ECU mapping.
Shawn: How does your fabricated Geo shift? :fawk:
03-22-2003 | 08:52 AM
#18
Thread Starter
lots and lots of fail
Joined: Dec 1999
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From: Deeeeeeeeeeeeeeetroit
Originally posted by Samson
you should never rev past redline.....
you should never rev past redline.....
Please post if you have some comments that solve this issue, not a dumbass post like that.
03-22-2003 | 09:49 AM
#20
Senior Member
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From: H-A.net
well, I know I can manualy shift and at 1st gear I can hold it open and it wont go past 6300. now if I have it in P or N then it will more then redline. adn its ok to go just a little past redline for a few sec factorys make the red line below the engines capasity for safety. In other words my red line READS at 6500 but is probby more like 6700-7000 although I wouldnt hit that very often if any at all.