3.3L V6 Pontiac Grand Am Gt w/3.3L V6 and 3t40 3 speed trans. Works fine cold. Wont disengage when hot. Also seems to be intermitant.
SOURCE: 1-2, 2-3 Shift solenoids on 2001 Grand Prix GT
You actually have the 4T65E. The solenoids are on the valve body when is inside the side cover that you see on the drivers side just below the cross over exhaust pipe.
Its not easy task changing them out without taking the transmission out. It can be done but would be an involved process in getting that thing lowered enough on that side to clear the side cover and to get access to that area and for what all is involved it may be simpler to just drop the tranny.
That said, there is an online community you can visit at www.grandprixforums.net that has many knowledgeable people on it not the least of which is a transmission builder that makes his living working on and building 4T65E's, 4L60E's and so on. If you like, sign up there and post up your dilemma there and see what input you get.
I own a 2001 Grand Prix GTP and Ive pulled both the engine and transmission and I would be hesitant to try and do the work you will need to do without dropping the tranny.
SOURCE: tcc switch 1996 pontiac grand am
There are 4 solenoids in the transmission, they are all supplied 12V through a common pink wire, and grounded individually by the computer. There are two solenoids for the tcc, one is called the tcc application solenoid, the other is the tcc PWM (pulse width modulation) solenoid. I'm not positive, but I believe the PWM solenoid faciitates the smooth engagement and disengagement of the tcc, but the application solenoid controls the bulk of the hydraulic pressure. If you want to check the resistance of these solenoids, the application solenoid is grounded through the tan/black wire, so you should see aproximately 28 ohms resistance between the pink wire and the tan/blk wire as they go into the transmission. The tcc PWM solenoid should have a resistance of about 12 ohms and you would measure this between the pink wire and the brown wire. The transmission should be electrically disconnected when you do these tests.
SOURCE: 1999 pontiac trans am 5.7 A T , won't shift past 2nd gear
Most likely is a shift silenoid. You can go to autozone and have them read the codes for you. Then you will know for sure.
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SOURCE: Car Heater Not Working - Blowing Cold Air
also check to see if tube that runs your climate door is not pinched or broken. the vaccum tube that runs the climate door is behind and under the battery. i had same problem a year ago and the tube was partially cut. i fixed it by cuttinga piece of aquarium tubing and spliced it back together. one other thing.....check to see if your radiator over flow cap is tight. your cap maybe bad and or cracked this would also cause the problem.
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