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ls1 gto 4l60e question

This is a discussion on ls1 gto 4l60e question within the Automatic Transmission forums, part of the Drivetrain category; I have a 04 gto with 59k miles... the last couple weeks I noticed when I get on-- probably one ...

  1. #1
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    Impulse Blue Metallic
    2004 GTO

    ls1 gto 4l60e question

    I have a 04 gto with 59k miles... the last couple weeks I noticed when I get on-- probably one out of 5 times-- when shifting from 2 -> 3 it bounces rev limiter until I let off then hit it again then it'll shift. Whys that? Completely stock. Zero aftermarket parts

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    None Shall Pass Knight's Avatar
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    G'day and welcome to the site.

    Have you checked the fluid lately, or done any service for the tranny? Does it do it at all from 1st to 2nd, or only 2nd to 3rd?
    It's not how fast you can go. It's how fast you can get there.

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    Impulse Blue Metallic
    2004 GTO

    No its only done it from 2nd to 3rd. But no I havnt done anything to it yet. Still have a temporary tag on it lol. Is there a scheduled maintenance list or something I can look at that has all the stuff due an at what miles?

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    Member JacobLS1's Avatar
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    The clutches could be going out. Hopefully you got a warranty.

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    Veteran 0rion's Avatar
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    columbus where? The first thing to do would be to check the fluid like knight said. Any mods done to the car that you're aware of?

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    Impulse Blue Metallic
    2004 GTO

    No I'm pretty sure its 100% stock-- and no. Bought it at an auction as is. The car is in perfect shape. Galloway west side of columbus area... not quite hilltop but close.

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    Veteran 0rion's Avatar
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    I'm just east of you in Lancaster. I could pull the tune for you and make sure it's the stock tune. I also still have my tune from my old 04 if you wanted a tune but first I'd figure out if you have a tranny on the way out or something. Have you checked the fluid yet?

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    Impulse Blue Metallic
    2004 GTO

    Hell yeah that'd be great... is it like an sct chip or something?
    I just realized its only happened when I manually shift from 2nd to 3rd. Could that be the problem? According to Valvoline place I went last night they require tranny flush every 15k miles... is that true?

  9. #9
    Veteran 0rion's Avatar
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    no....you don't need to flush it that often. I also wouldn't manually shift it....the pcm will shift better and faster than you ever will. As long as it's mechanically solid I can flash my old tune to it and you'll be amazed at how it shifts. Pretty considerable difference. I removed torque management, sped up the shift times, and raised the line pressure. I also have it commanding 12.8:1 afr and have the maf dialed in so you'd get a somewhat decent gain in HP. I would want you to be sure the car is mechanically sound first though because I ran this tune for 5 years so I know it's good and I don't want you thinking the tune busted your tranny if something were to happen to it. I use hptuners to tune. I tuned my 04 gto, my heads/cam firebird, my buddies heads/cam vette, 4 other gto's, several other f-bodies, and used efilive on my duramax. I don't claim to be a pro tuner by any means but I have the same tune I ran in my gto that would work perfect for you and it's not like you're car would be my first attempt at tuning.
    Last edited by 0rion; 05-24-2012 at 07:10 PM.

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    Impulse Blue Metallic
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    How much to tune my car?

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    Impulse Blue Metallic
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    The car has been to Valvoline. Every 3-4k miles for oil changes, and had a coolant flush, fuel system cleansing, an has had 4 tire rotations... the guy b4 me took good care of it... the car is in great mechanical shape

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    Veteran 0rion's Avatar
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    check your email.....I can get with you and give you a hand.

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    Impulse Blue Metallic
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    Well now things are acting wierd.... Seems sluggish from a stand still. Today I was at a light and I pushed the gas an nuthin... Just a rev. Waited a second- then it went. Getting on the freeway I punched it a little; grabbed great and once it hit red line it bounced three times and then made a LOUD squirming sound I heard over the car an radio.

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    Impulse Blue Metallic
    2004 GTO

    Loud squeeking sound**

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