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Old 08-23-2007, 09:39 PM   #81
lvemy3100
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you are gonna have to pull it all apart anyways for the clutch paks so really the cost is gonna vary quite a bit based on what needs to be replaced as well as what you are paying in labor for the build and R&R
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Old 08-23-2007, 09:41 PM   #82
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well true. ill just have to call around tomorrow. You're not the only one who has said its been the clutch,im just in denial
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Old 08-23-2007, 10:17 PM   #83
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Are you talking about surging where the RPMs shoot up and down when it's shifting?
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Old 08-23-2007, 10:30 PM   #84
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yea when its getting ready to shift to the next gear on wide open throttle,watch the video about 8 seconds in,you can see it bouncing
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Old 08-25-2007, 12:04 PM   #85
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One test I went through and it seemed to localise the problem had to do with resetting the PCM. Reset you PCM and then drive your car normally( aka no heavy WOT runs). If the issue arrises immediatly then you can be pretty sure its the clutch packs. If not and it seems to go away for a week or more then its the gasket. The reason why the gasket issue might not show for some time, deals with the relearn process. The PCM is trying to learn how much pressure the TC will provide around certain shifts. Then you accelerate hard the pressure is supposed to go up, but after it reaches a certain point the failing gasket allows the fluid to leak, causing the pressure to drop. The PCM tries to compensate and that is the revving that I saw, and could be the same issue you have. Try this little test, it may take a few days to learn, but at least it may provide a answer.

P.S. It took me several years of trial and error to finally get an answer. Thank goodness for warranty. Now I have a pretty much new tranny from all the replaced parts, but the last fix.. Fixed it.

I heard that I was one of the first cases of this issue. So I was GM's little guinea pig. Sux to be first.

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Old 08-25-2007, 01:24 PM   #86
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Yea to update. I reset the PCM,i slowly discovered the trans was going.Although the car ran fine normally.and minus the surging. But yea i bit the bullet yesterday and took it in to have the tranny rebuilt.The place is doing it how i want it. The fluid was black,seriously and smelled burned. So yea
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Old 08-26-2007, 03:45 PM   #87
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Quote:
Originally Posted by drumking1721 View Post
yea when its getting ready to shift to the next gear on wide open throttle,watch the video about 8 seconds in,you can see it bouncing
I have 115,000 mi on my 2000 and mine has been doing that for 20,000+ miles. I've never had the fluid changed so when it started doing it, I considered getting the fluid and filter changed. Called around to tranny shops and most recommended I just leave it alone because new fluid may cause more problems. SO, I put in some Lubegard and drive my commute to work each day. If I stay out of the pedal, the car drives and shifts just fine. I hope my tranny gets me to 150,000 mi when I can get a new car.
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Old 09-25-2007, 08:12 AM   #88
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Have the same problem occuring now in my '01 with 89,000 miles. Had the valve body in the transmission replaced before and now may try the PCM reset. One dealer I took it to said to just leave it alone as mine is not surging very badly.
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Old 09-25-2007, 08:21 AM   #89
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does it happen all the time to you guys or like once and awhile (3 or 4 times a month?). cuz like with mine, it'll be fine for months then it'll start acting up for like a mile or 2 then fix itself....
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Old 09-25-2007, 09:44 AM   #90
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does it happen all the time to you guys or like once and awhile (3 or 4 times a month?). cuz like with mine, it'll be fine for months then it'll start acting up for like a mile or 2 then fix itself....
Mine does it all the time between 45-65mph. Has been for the past 4 months or so.
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Old 09-25-2007, 10:43 AM   #91
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Originally Posted by cardude007617 View Post
does it happen all the time to you guys or like once and awhile (3 or 4 times a month?). cuz like with mine, it'll be fine for months then it'll start acting up for like a mile or 2 then fix itself....
Your situation sounds like the same as mine. If the fluid is clean, then you might want to check into my resolution.
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Old 11-30-2007, 11:42 AM   #92
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omg!!!! my GA did it this afternoon...im doomed.
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Old 02-11-2008, 02:33 PM   #93
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mines doing it now, i replaced the maf cause it was dirty as ****, seemed to help but my problem is that i go WOT and the car accelerates like normal when it gets to about 5,500RPM it shifts but the RPMs drop down to about 4k RPM and then the car starts to pull a little more, almost like a slip but it still accelerates but it accelerated more when the rpms drop down. Then again, 117k miles on original tranny...
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Old 02-12-2008, 10:10 AM   #94
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yah ur tranny is slipping...time for a rebuild...ive seen it numerous times
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Old 06-08-2008, 11:56 PM   #95
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well looks like im the latest to have this issue. anybody have a price on a rebuild?
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Old 01-27-2009, 08:56 AM   #96
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So...videoman.... the final answer is a drive bearing gasket?

2002 GAGT 106K
Already replaced the shift solenoids @ 75K fixed the problem until now...

Symptoms are back and are as everyone lists:
Cyclic surging from 2->3 (40 mph) and 3->4 (50 mph)
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Old 01-27-2009, 12:13 PM   #97
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Well for my 2002 GAGT that was having the surging issue. I have reprogramed the PCM and increased the line pressure, so that the shift is a bit more firm and voila. No more surging. I think that's what was my problem all along. the pressure was showing up to low so it would try to rev higher to up the pressure then it would drop again..so on and so forth.

If you have been maintaining your tranny and doing the regular maintenance and have no reason for the system to be acting up. Try getting a pro to reprogram the PCM so that the pressure is a bit higher. All I can say is that it has worked for me.


Try it out, I hope this helps.

Edit: Just wanted to add that now that I know this fix has worked, it all makes sense. Everytime I would reset the PCM it would default back to the manufacturer specs, which call for a higher pressure level. Then after a while as the car learns, it would lower the pressure to provide smoother shifts. this would then cause the surging issue because the pressure would be low.

Now that the PCM has been changed, it will maintain the settings that have been put in place and not reduce the presure.

After all this, I am sure glad I got an answer... and Typically I had to find it out for myself! and not from GM.

GL Everyone.
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Old 07-14-2009, 11:38 AM   #98
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sounds liek torque converter or u need to change your tranny filter and flush ur tranny
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Old 12-10-2009, 12:18 AM   #99
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So, here we go, figured this would happen sooner or later.

I am getting surging issues this winter. However, it ONLY happens when it kicks into overdrive. Since it is in the -20's and 30's here, for the first 10 minutes or so on the freeway, it will not kick into overdrive because it is to cold, however once it warms up, and makes the change into overdrive, the engine rises and falls in 200-300 RPM increments.

It is like it is trying to come out of overdrive, but then in the same second it does it kicks itself back down to overdrive RPM, then a second later, all over again.

It seems if I run the car for long enough, a longer trip, this goes away once it warms up enough, stays at a steady 1800 RPM or so doing 90 KM/H. Last winter, I did not have this issue, nor this summer, this started 2 weeks ago for me now. Every other gear, it shifts beautiful, it's just when it is changing into overdrive. Tons of power, no weird noises from anything.

any ideas?

Is it costly to do the seal on the main shaft as the one member did, I assume so because at that point your taking crap apart all over the place.

Only at 103,000 KM

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Old 12-10-2009, 02:31 PM   #100
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that is EXACTLY whats happening with me. Has been for a few months. And super random. But usually on a slight uphill with the pedal in a certain area. IDEAS!?
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