does anyone know the avg operating temp of the trans, and at what temperature i should start to worry?

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SLP Intake|SLP Powerflow|ZZP DP|ZZP PCM|GMPP Handling Kit +Rear STB|ZZP Powerlog|ZZP Stage 1 TB|Immaculate Original Paint

If you're driving really hard, I'd let it slide to about 215* or so. Much above that isn't good. When I was running mine, highway temps were around 190-200*.

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One Big Ass Mistake America

the highest ive seen in my GP was 246... but i always c 228 i can get it to that temp easily

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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....

I've seen 27x*. Was driving like a man possessed, and that's what it got to. Was in "safe" mode, not going in to 4th gear. I haven't ever seen that before, haven't seen in since, either.

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One Big Ass Mistake America

thanks guys, i was runnin at ~225 today and was worried that was dangerous

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SLP Intake|SLP Powerflow|ZZP DP|ZZP PCM|GMPP Handling Kit +Rear STB|ZZP Powerlog|ZZP Stage 1 TB|Immaculate Original Paint

Hydramatics like to run a bit hot. Its fine. Anything below 225ish is awesome.

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Self made, not daddy paid.

HAHA wow this makes me feel good..I hate seeing my tranny above 200 i have had it to 212 and thats it.

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Dave's Hocus Pocus Tuning of South Dakota

I can't remember where I've seen it, but basically the addatives in a transmission fluid start burn off at around the 225-230* mark. I think the fluid itself starts to break down around the 250* mark and higher at an accelerated rate. I think I've heard someone say that transmission fluid life will drop to only hundreds of miles of life if operated at 300*F where it should normaly get you around 30,000 miles of life.

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-Matt

+213,000 miles: 3.4 pulley, Full SLP headers/catback, ZZP PCM, CAI, 180* thermostat, GMPP handling upgrade, 12"brakes, TripleEdge 3.29 Transmission.

Mine is at 181 during cruising and never get's over 200. I have a tranny cooler in addition to my t-stat and lowered fan temps.

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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

Mine stays a 179-181 while cruising and the most I have seen is 207 at the road track and 205 in the mountains.

Cooling mods are....
fresh dextron 6 every summer
180 stat

that is it.

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04 GTT - Retired
Best ET 13.016
Best Trap 115.56 MPH

iirc the magic number for "limp home" or "safe" mode for the GP's 4t65E trans is 24x*(two hundred fourty something)

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2005 Pontiac Grand Prix:|SE front|SPO grilles|HPTuned|HUD added|5-button DIC swap|Wizaired CAI|180*|EGR delete|GMPP rear sway|F&R STBs w/DRs brackets|3.29s|HD Diff|7/8" chain|WBS TA's|SD Headers|GenV SSM90 Hybrid(INSTALL PENDING)