[Blackbeauty v601]

I heard from some people that it maybe a bad thing if you change your transmission fluid i was wondering what all of your input maybe on this. Is it a good or bad idea to change your tranny fluid, and also how often should you change it?

[04DSGV6]

supposed to every 30k by fords specs.

[Trance]

change it just about every year, and it will be fine.



though, ive known people that haven't ever changed theirs

[itschristorres8]

if you've waited longer ten 80kmiles i wouldnt change it

[AtlanticBlue99]

Originally Posted by itschristorres8 if you've waited longer ten 80kmiles i wouldnt change it

i changed mine at 90k miles, but not since

[itschristorres8]

Originally Posted by AtlanticBlue99 i changed mine at 90k miles, but not since

you may have been lucky
it also depends on the tranny to

if you have any sludge or build up in the tranny thats covering or blocking a leak changing the fluid will remove that sludge at start up and thats when you'll have issues.

[Blackbeauty v601]

im at about 46,000 miles do you think i should change mine? and also how do you do it i have never changed tranny fluid before is there a screw like when changing the oil?

[Trance]

its a bigger pain in the ass.. i usually pay someone to flush mine

[Blackbeauty v601]

so its porb going to cost me about $40-$50 to have it done at a shop?

[BostonPerformance]

it's $100 everywhere around here. you can do it yourself- it's just not as easy as changing the oil.

[Lt_Crazy]

I do it at Ford.....~130$$ just for that.....They say that about every 50 000Km it should be flushed.........

[stephen]

I would recommend changing the fluid at 30K mile intervals.

You need to remove the transmission pan and you should also remove the drain plug in the torque converter. That way you get most of the fluid out. It takes about 10 qts to refill so your talking about ~$50 for Ford fluid. I recommend buying the fluid from Ford. I've found it works noticeably better than aftermarket fluid.

Some people say there can be a problem with changing the fluid if it hasn't been done regularly, that it could dislodge sludge and cause problems. I don't know what the basis of that is, but I would recommend changing the fluid regularly from the beginning to avoid that problem.

[04DSGV6]

Originally Posted by stephen I would recommend changing the fluid at 30K mile intervals. You need to remove the transmission pan and you should also remove the drain plug in the torque converter. That way you get most of the fluid out. It takes about 10 qts to refill so your talking about ~$50 for Ford fluid. I recommend buying the fluid from Ford. I've found it works noticeably better than aftermarket fluid. Some people say there can be a problem with changing the fluid if it hasn't been done regularly, that it could dislodge sludge and cause problems. I don't know what the basis of that is, but I would recommend changing the fluid regularly from the beginning to avoid that problem.

I thought the 4r70w takes almost 14 quarts

[stephen]

I'm not sure what the capacity is for a totally dry system, but after a drain and fill including the torque converter, I found it took somewhere between 10 and 12. I would buy a case of it (12 qts). Even draining everything as best you can there is still some old fluid left. Transmission shops have equipment to do a more complete flush.

[BostonPerformance]

shop told me 13qts when they did mine.
you can drain the pan, then put the pan back on, and disconnect the hose that runs tranny fluid FROM the tranny TO the radiator and crank up the car, but AS SOON as that hose stops spitting fluid you should cut the engine. as far as i know that's the best way to do it yourself.