I built this page on my website a while back to help guys out with some common questions for problems with these transmissions.
http://www.tripleedgeperformance.com/4T ... n_Info.php

The trans in my 2004 CompG seems to slip when I shift to 2nd gear using Tapshift, but it's fine when I let the trans shift automatically. Also at WOT it seems to shudder when using Tapshift but it's doesn't do it in Drive. What would cause this? I did switch to Dexron VI synthetic but that didn't help any.

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Bright Red 2008 G8 GT

Mods: DRCUSTOMPARTS Center Gauge Bezel
Superchips ECM/TCM Tune- Volant CAI
Custom Borla Axle Back Mufflers - HID's
Holden V8 Badges
My Website

wheres the link???

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2000 Silvermist GTP. CAI, 180 t-stat, stage 2 shift kit, u-bend and resonator delete, fastkatt tuned PCM, autolite P104's, 3.4 pulley, altenator wire upgrade.

i flushed my tanny without dropping the pan or changing the filter, and i feel its slipping between 1st and 2nd, do u have any ideas?

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Black 06 GP GT
S2 IC, 1.9 Rockers, TOG Headers w/ full custom exhaust, CAI, 104 Autolites, Custom Tuned PCM, 3.3....
And still Working its way up....

Found out some interesting info on using Dex VI in that it is only meant for tighter tolerance tranny's for our cars. It is recommended to use Dex III in these cars.

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2009.5 SBM G8 GT
November 2011 Car of the Month

I also have the same problem with my 04 - from 1-2 WOT the car shakes a little - I'm getting a Built tranny, hopefully that fixes the problem.

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2004 GTP Competition G
ZZP Stage 3 Heads, ZZP Stage 2 IC, XPZ Cam, 3.5 Pulley, ZZP HD Tranny w/2500 Stall, SLP Header w/High Flow Cat, Wiz CAI, 180 T-Stat, 65# Injectors, 130# Springs, Autolite 104's, ZZP Custom Tune, Blue PRJ Spark Plug Wires, HP 2.22 Tuner

Thanks for this - I currently have the 3rd/4th gear RPM bouncing problem and, I suspect, a worn out torque converter (it takes 2k RPM's to accelerate normally) I'm taking it in for a rebuild regardless simply because the tranny has 225k miles on it I'm really hoping to see a big difference in the way it performed previously.

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[url=http://www.twitter.com/sshow]Twitter.com/SShow[/url], follow me.

ya my car dose the shutters on takeoff at a light. tranny man here is the thing, if i do the same thing while manually putting my car into 1st it wont do it. anyone have any suggestions? im doing a flush and filter sometime in the nearby fututre

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Behold the majestic beast as it strides

It would be great if there was something we could do about the 1-2. I did the ZZP shift kit set at firm with dex 6 and it still doesn't quick enough. I went back and added a new 2-3 spring in place of the 1-2 and couldn't tell much difference there either. I was able to help things a little by raising the Max_Turbine_Torque_TCC_Unlocked to 1000 ft-lb in all the cells. I also raised the Brake_Torque_Limit but think I may need to raise it further. Try these at your own risk, I'm just trying different things and may break something.

Steven

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39# inj, LQ4, FWI, Jardine exh, OBX hdrs, PT, AL104s, PRJ Wires, DEI boots, 180 stat, 3.4 MPS, MSP poly eng mnts, F&R STBs w/ DR brkts, poly sway bar bushings, painted tails, SPO grills, spoiler & tips