Trans overheat I have a 2000 Ford Taurus VIN # 1FAFP53SXYG112524.I will give you some background info on the car.I purchased the car with 65,000 miles on it with a knock in the engine(very unusual for these engines.At the time it drove OK other than the engine was making lots of noise.I purchased a used engine with about the same mileage and had it installed.When I picked it up it ran good but all of a sudden the check engine light came on then the warning light in the dash cluster with the asterics started flashing.I at this time have not got the code number but my mechanic said it crossed to trans overheating.I have not driven it but it showed no signs of overheating,no foaming of the fluid and it shifts fine.As this occured after the engine install I presume it is a problem in the install.I just wanted to see if anyone out there might know of a cure for the problem.

Please let them check oil level and oilcooler of this cars' transmission. It is just an instalation error and is normally easely fixed.
Had that happen to my taurus too.

I agree with benimur,its good to see someone with actual knowledge than people who just send you to websites cause they dont know what there doing,im not here to badmouth it just seems like it happens a lot on here lets stick to what we know you cant be a jack of all trades,cause if you think you are you just causing people money by taking guesses

Flashing like the check engine light you mean if so that a warning if you continue driving the convertor catslytic may get damaged hope it help let me know pierre

Hi,

Based on your description that the transmission functions normally, then it could just possible be a bad sensor (likely) or a loose/corroded/dirty connection to the sensor (most likely).

To my knowledge, most of the transmission (AX4N) sensors for a Ford Taurus are connected by two (2) big connectors (and a third for the VSS or OSS). The 1st is easily seen (on top of the transmission, 8-10pins) and the 2nd (further, 9pins) that is used for 3 transmission solenoid connections, trans oil temp, pressure control solenoid, torque converter clutch, PCM, junction box among others.

You could try using an electrical contact cleaner (pls be careful, some are too strong to melt plastics) or manually clean the male/female plugs/jacks or terminal pins.

You may want to reference this page for complimentary information and some images.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Hi, IF you said the car is not overheating the gauge is normal.
But the mechanic said the code is for overheated the transmission., And the computer send to limp mode.
By your comment this come after you replece the engine.
OK.. Check the connector on the transmission all the wires going to the selenoids and the transmission range switch.
because you have a electrical problem, thinking if you drive the car it's doing the problemwhen the engine is cool or when the engine is at normal temperature?.
IF doing at all times, the problem is electrical.

Check the water pump