Dalej

need help with changing transmission fluid???

Kattumaram

I guess we know you have an F150....but what year, what tranny, still on warranty, what?

Dalej

Sorry my bad. its a 1999 4.6lt v-8 4speed tranny with tow package.. i have had the tranny flushed at tire kingdom but never dropped the pan and replaced the gasket and filter.. if you do this, does it empty the fluid in the tran cooler??? if not how can i do this???? thanks.. DJ

Kattumaram

Dropping the pan and replacing the filter is almost a given for any tranny service; however, it does not drain the oil cooler...not to worry since the cooler contains very little fluid anyway. If the filter is changed out, be sure to get the old oil seal out of the port in the tranny. Failure to do so can cause major problems.

BTW: If you're nervous about the small amount of old fluid in the oil cooler, then loosen the top oil line fitting at the radiator, remove the bottom oil line fitting and let the fluid drain out. Reinstall the fittings and procede with the remainder of the service.

If the torque converter on a '99 has a drain plug, then removing it and draining the TC is an important factor in tranny service.

Were it my truck and the torque converter had a drain plug, I'd drop the pan, replace the filter, pull the TC drain plug and drain the TC and refill the tranny with ATF+4...yes, Chrysler fluid.

ATF+4 works as well as Mercon V, but lasts about 50% longer. It is specifically designed to prevent clutch/band shudder and does not present any seal compatibility problems. Both trannies in my Lincoln TC (AODE) and F150 (4R70W) are filled with ATF+4 at the recommendation of the local shop of 40 years experience where I have all my tranny service performed. Both trannies work flawlessly, and the F150 tranny works noticeably smoother than it did with Mercon fluid.

Dalej

Thanks so much for the info.. I will take your advice on change the tranny fluid with ATF+4, again thanks... DJ