dbuchner

I just purchased a used 2002 F150 4x4 super cab with a 4.7 Triton V8. I put new shocks and new exhaust manifold and flushed and replaced all fluids except for the ATF. I don't know the history on the ATF changes. The fluid is a little colored. Trnsmission shifts fine. But, do I change it? I have talked to some guys and everyone seems to have a different approach. I spent 2,500 on tbe truck and i would like to keep it for a while. suggestions?

harm63

I've always heard that changing high-mileage transmission fluids is based upon the smell of the fluid on the dip-stick more than anything.... if it has a burnt smell to it, then don't change the fluid as that will expedite the transmission failure by "cleaning" the deteriorated pieces of the linkage, etc. inside.... which will give you slippage when shifting for example.

I've heard countless horror stories about flushing the transmission (aka transfusion of new fluids).... best practice is to drain from the pan only, replace the filter, and fill it up. Hope that possibly helps my friend.

2002FX4

pan drop/4-5qts fluid and filter

dbuchner

[QUOTE=harm63;3128533]I've always heard that changing high-mileage transmission fluids is based upon the smell of the fluid on the dip-stick more than anything.... if it has a burnt smell to it, then don't change the fluid as that will expedite the transmission failure by "cleaning" the deteriorated pieces of the linkage, etc. inside.... which will give you slippage when shifting for example.

I've heard countless horror stories about flushing the transmission (aka transfusion of new fluids).... best practice is to drain from the pan only, replace the filter, and fill it up. Hope that possibly helps my friend.

Thank You!

Collin

Indeed just drop the pan. Most people wait until the trans starts acting up then change the fluid hoping it will fix the issue but by then its too late. Then they blame the fluid change for the trans failure.

caron

I would have to agree with the above main thing would be to change the filter

TomB275

The most important thing to follow is to use EXACTLY the brand and spec trans fluid as recommended in the Owner Manual. The bands and clutch facings are very sensitive to different oils and additives. This goes for any vehicle.
Dropping the pan and replacing the fluid and filter with the correct spec will not cause harm. Using new fluid that is the wrong type can definitely cause harm.