Heres a good question

[Aleromaster]

I was racing tonight (yes leagly). I have the 3400. Going throught the first gear it reved up to 6500rpm and during the shift the tires chirped. Then trough second gear same thing happened again. What the heck happened. I was unable to recreate the events though. What do you guys think happened. By the way I spanked the accord

[Aleromaster]

What nobody has anything to say? Ops I also noticed its in the wrong section

u sure it was the tires chirping??? u may be mistaking that for the motor hitting the rev limiter......

[Aleromaster]

No it was tires cause it happens after the shift and I know what my tires sound like. And anyway souldn't the rev limiter kick in before that. I was not shifting it manually

well then i would jsut guess that ur tires for whatever reason really hooked up an the tranny jerked extra hard to get them to chrip that one particular time.

[Aleromaster]

Actually I was more concerend about the 6500RPM thing as I have never seen It go that high before and believe me I've tried to recreate it. The Tire chirps was just kind of cool. Made people think I had some mad power under the hood but all I have is a WAI

[brsexton]

Your right, that is a good question on how an automatic can do that. If I were you though, I would not rev it up to 6500 very often to do it again unless you want to end up like SilverKnight .

[Aleromaster]

Originally posted by brsexton@Mar 2 2004, 09:52 PM
Your right, that is a good question on how an automatic can do that. If I were you though, I would not rev it up to 6500 very often to do it again unless you want to end up like SilverKnight .

Well its not exactly like I wanted it to happen. I always relied on the car shifting its self when it needed to. And me warrenty would acctually cover my engine casue I have no major mods done. Just WAI fore now

[brsexton]

I know what you mean. I don't think mine has ever hit 6500 but if I floor it from a stop, it revs really high before it decides to shift. My mom's malibu (3.1L) was the exact same way. Other cars I have driven don't rev like that. I think GM's just like to rev.

[Fast Eddie]

I've get a 2.4 manny with C/H/E and can only chirp third when I try very hard, and my gearing is alot more likely to transfer that kinda power to the wheels, so I'm calling BS on chirping third in an auto.

As for revving high I think the rev limiter, at least on the 2.4, is like 66-6700, so 6500 is just before the limiter, but I wonder how many autos, not manual shifting, have hit the rev limiter.

[smokinAMD]

That is a bit high, I believe the highest mines ever shifted at is around 5700.

i've seen mine take it up to ~6100-6200 but it's never chirped the tires after the shift

http://www.gm.com/automotive/gmpowertrain/...s/4t45_main.htm

Maximum shift is at 5800rpm.... check the link out for more info on the 3400 tranny.

[Redog]

I "chirped" mine once but it was under normal acceraton on a rainy night right after I have the manifold done.

Mine usually shifts around 57 or 5800, but I have pushed it above redline but only until about 6400

Maximum shift is at 5800rpm.... check the link out for more info on the 3400 tranny

This is only for the tranny, the motor usually can handle about 6500 RPMs. They put the redline lower for a safety. (at least they used to) :unsure:

Originally posted by Redog@Mar 3 2004, 06:29 PM
This is only for the tranny, the motor usually can handle about 6500 RPMs. They put the redline lower for a safety. (at least they used to) :unsure:

Not debating that, just posting the information for technical debate.

I've seen auto tranny's once in a while shift out of a gear only once you've let your foot off the gas so it can get back to lower RPM's.

more than likely the engine rpms never got that high. the stock tach isnt that accurate or responsive.

Originally posted by haulmarc@Mar 3 2004, 07:12 PM
more than likely the engine rpms never got that high. the stock tach isnt that accurate or responsive.

I don't know about that. My mother had an Olds 98 a long time ago. I took it out for a ride once and stomped the gas pedal to the floor. It screamed in first gear until it ran to the end of the power band and peaked out. It didn't shift until I took my foot off the pedal.

As for the stock tach, it's not THAT out to lunch either.

There's a fuel cut off somewhere around the 6500rpm mark so don't worry about it... the fuel cut of is there for a reason, so unless you somehow go past that I wouldnt worry.

It's odd how nobody seems to know exactly where the 3400 is supposed to shift under WOT... my 2.4/4-speed auto shifts at 6500RPM under WOT every time, and fuel cut off is at like 6700rpm, I've only hit it like once when the shifter was left in D1 (have to move it back to get change out of my ash tray)

Originally posted by Crazy_Canuck+Mar 3 2004, 02:44 PM--></div><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (Crazy_Canuck @ Mar 3 2004, 02:44 PM)</td></tr><tr><td id='QUOTE'> <!--QuoteBegin-Redog@Mar 3 2004, 06:29 PM
This is only for the tranny, the motor usually can handle about 6500 RPMs. They put the redline lower for a safety. (at least they used to) :unsure:

Not debating that, just posting the information for technical debate.

I've seen auto tranny's once in a while shift out of a gear only once you've let your foot off the gas so it can get back to lower RPM's. [/b][/quote]
You are partially right, the reason the 4 bangers can get up the 6500 rpms is they have a lower speed going into the transmission. The sprockets on the 4 bangers are under driven, also they have a looser torque converter. The 3400 have a considerably tighter torque convert, and straight sprokets. 1:1. So to keep the speeds down doing into the baral of the trans, they have to shift lower. There are some things that can be done to the trans to raise WOT shift speed though.

[quote]QUOTE (haulmarc @ Mar 3 2004, 07:12 PM)
more than likely the engine rpms never got that high. the stock tach isnt that accurate or responsive.


I don't know about that. My mother had an Olds 98 a long time ago. I took it out for a ride once and stomped the gas pedal to the floor. It screamed in first gear until it ran to the end of the power band and peaked out. It didn't shift until I took my foot off the pedal.

As for the stock tach, it's not THAT out to lunch either. [quote]

canuck, if you looked at it on an auto xray diagnostic scanner in realtime you would clearly see that most if not all stock tachs respond slowly and overtach on acceleration. the scanner reads off the computer. the tach is analog and is inherently slow. aftermarket tachs otoh are more accurate.