nineball

the trans shop would have the machinery to do a full flush and get out all the old fluid. the independent may, but i would call first.

hinglemccringleberry

It's either a trans flush or a pan drop/filter change for me. I'm not doing both (too costly), and I think it's a higher priority to do the pan drop now since this will be my first time servicing the trans.

nineball

to each his own. would you only change the oil filter and not the oil? granted the filter is the more important part of either system but you are leaving a lot of old, used fluid if you don't have it flushed which has the potential to prematurely wear out the new filter. it is (relatively) cheap to maintain (vs replacing a trans in the extreme case). i've changed all the fluids (trans, x-fer, diff) on every truck i've owned every 50k and it has served me well. then again there are people that never change those fluids are are still driving on the road today. it's a personal decision, but i would rather spend a little today than a lot down the road (for repairs or replacement vehicle).

hinglemccringleberry

Seems like everyone on this forum prefers to drop the pan and change the filter and do a partial fluid change first.

FX4362

I did mine at 50k after watching the same video and freaking out a bit. I just did it again at 75k and will again at 100k. Don't hate. It's my truck and I want it to last. I'd rather pay for that than whole new tranny.

Jonmad

The Ford tech on YouTube said a flush is a waste because there is a thermostat in the transmission that needs to open to do a proper flush. He said they would have to beat the crap out of the truck in the shop to get that thermostat to open. He recommends just dropping the pan.

MattXLT

I may be wrong, but I think the Ford dealers are able to connect to the diagnostic port on the truck and open the thermostat manually through the computer to do a full flush.
Again, just what I’ve heard or read somewhere so it might not be true...

RLXXI

What he said about the thermostat is correct.
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Jonmad

[QUOTE=Rnlcomp;6155718]What he said about the thermostat is correct.


Are you saying the dealer can manually open the transmission thermostat to perform a flush? Is it electronic?

RLXXI

[QUOTE=Jonmad;6155728]No I'm talking about what the youtube tech said about that. The thermostat is not electronic. You can't flush the trans, you can flush the cooler, you can drain and refill the trans as well as a fluid exchange (special machine required) for the latter.
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