I have an 05 F-150 and I've just reached 36,000 miles. I'm trying to be proactive and take care of my baby. When would be a good time for a good flush and fill of the tranny? I don't know if flush and fill is the right terminology but you know they hook it up to a machine that flushes out the old fluid and puts in new fluid all at the sime time trying to flush out any sludge that may have accumulated.

I love my truck and I want to make sure I do the right stuff at the right time with it, as opposed to prior vehicles I have owned.

Any thoughts or opinions are appreciated

 

Yes, that's a good thing to do for extending the life of your trans.

 

A good time would have been at least 6K miles ago.

Tell the dealer or shop you want a "T-Tech" or equivilent flush.

Steve

 

T-tech works great. You may want to have the pan dropped and filter changed at the same time. At my dealer that's the "complete" service and its almost $200. A flush without a filter is around $150 and a pan drop and refill with a filter change is $100. If its done at the dealer they will use Motorcraft Mercon V fluid and you'll have no problem. If you go elsewhere make sure they use a fluid that meets Mercon V specs. Don't let them use regular Mercon and throw a can of additive in the transmission. Personally, I've found my favorite dealers prices to be competive and I know I'm getting the right fluid and filter.

 

Thanks!! I'm not that much of a gear head so I knew I couldn't go wrong in asking here.

 

Ok now is everyone comfortable with the use of a trans flush machine on your trucks?? for example let say someone that has neglected their trans and the fluid was as dark as used 15W40 diesel oil and that same machine was used just minutes before you got there and now you are there at the service department waiting your turn for the trans service. Is everyone comfortable with that whole concept?

 

If the trans fluid is black the trans is already toast. Whether or not yo change the fluid you'll be replacing or rebuilding that trans very, very soon.

 

I guess those flush machines do a decent job, but I prefer to save the mentioned $200 and do it myself.

Drop the pan, clean the magnet, replace the filter, fill trans up with new Mercon V fluid, disconnect aux cooler return line, start truck and catch old fluid coming out, fill pan once more, start truck once more. Button everything back up and fill up pan.

This completely flushes the convereter, cooler, and lines of old fluid, and also gets you a fresh filter all for the cost of about 15 quarts of fluid and the filter itself. Plus, you know its done right and you don't have to let some service shop moron get near your truck.