infinity J30T tranny problem ???

[1SOL2NV]

but why would it drive fine when cold then not at all when warm ? i can understand that if it didnt work period ... but it drives like it just came from the showroom floor when its cold ....

[Kaiser]

but why would it drive fine when cold then not at all when warm ? i can understand that if it didnt work period ... but it drives like it just came from the showroom floor when its cold ....

You said the fluid looks brand new. Are you CERTAIN it didn't get changed out anywhere along the way? Crank the car up, get it to running temperatures, and check the fluid level. I have seen low fluid levels cause this kind of thing before because there just isn't enough for the torque converter to do it's job properly. After verifying there's enough fluid, your next step should be to replace all the fluid in it and verify that it's the right kind of fluid. Different AT fluids have different properties at operating temperature, but almost all of them are still dyed the same color red. The wrong trans fluid or not enough would be your ABSOLUTE cheapest problem here, so it's a 100% must check.

Remember, get the car up to OPERATING TEMPERATURE, where it won't move any more, THEN check the trans fluid with the ENGINE RUNNING. If it doesn't show up at the full mark on the dipstick, find out what kind of Trans fluid it needs from your local parts store, purchase some, and add. Once you've added a little, (Remember it's usually 1 pint between the crosshatches not 1 Quart like motor oil) pull the car through PRNDL and back a few times, staying on each gear, then check the level again. Had a customer bring in a car to work just last week that had a similar problem that was caused by a lack of transmission fluid. (Car stopped moving regardless of revs at certain temperature). After topping him off we took him on a test drive and the car ran smooth and shifted perfectly.