Servicing 6r140 Transmission

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Dec 17, 2015 | 11:32 AM

#16

droldsmorland

Fleet Mechanic

Joined: Nov 2011

Posts: 1,825

Likes: 43

From: Land of Taxes

Yes, hearts always in the right place trying to help others out. Glad you did not take offence as so many like to do right out of the gate when even slightly challenged..thanks. This is a discussion for me (all) to learn. I am a data driven engineer. I guess the other alternative to be conclusive and to satisfy my curiosity would be to see what an oil analysis data sheet reveals when it's brown. To me brown = contaminants and unwanted high ends, acids etc...
Is my experience with 5R110W and a 6R140 an anomaly? As both did not exhibit brown fluid after very many more miles than what was shown in the vid. It just doesn't look right knowing what the inside of many automatics looks like as well as having had trans fluid on my hands for 30 years. But I'm willing to have this old salty dog learn a new trick.
A TH/350/375/400/700R-4/200-4R, a 727TF or a C4, C6- AOD etc...would be at it lifes end or very near it with brown fluid.

Nov 9, 2017 | 08:15 PM

#17

Jayybird

Tuned

Joined: Jul 2009

Posts: 489

Likes: 4

how often is the 6R140 suppose to be serviced? Mileage internvals..etc?

Nov 9, 2017 | 09:04 PM

#18

Just Strokin

Post Fiend

Joined: Nov 2001

Posts: 6,748

Likes: 119

From: Tallassee, ALabama

Every 150,000 miles change fluid and filter. There is no way to drain the converter. Only let a shop flush your transmission if they have a heated flush machine.

Nov 10, 2017 | 05:36 AM

#19

CollinsCD

Hotshot

Joined: Aug 2001

Posts: 16,293

Likes: 402

From: Odessa, Delaware

Quote:

Originally Posted by Thenewboss

From what Iv'e read here, there are all kinds of check valves that only open or operate at certain temps. The dealer has a machine that heats the fluid in order to get all the fluid out. I guess if you do it in your driveway you are basically doing a partial change. I like doing most of my own maintenance, but systems like this I think I'll leave up to the dealer.

Good luck finding a dealer with a with a heated fluid machine. None of the dealers in my area have one so it's not worth having the dealer do a partial change when you can do it yourself and save a ton of money.

Nov 10, 2017 | 06:23 AM

#20

T diesel

Posting Guru

Joined: Nov 2011

Posts: 2,279

Likes: 12

I did one at 50,000mi.
https://www.ford-trucks.com/forums/1...first-diy.html

Nov 10, 2017 | 07:32 PM

#21

Bugzilla46310

Fleet Mechanic

Joined: Nov 2015

Posts: 1,678

Likes: 680

From: DeMotte, IN

Just took mine to Ford for a hard shifting into 3rd. Has done this almost from new and I have told the dealer about it previously. Only does it the first shift after it sets for over 4 or 5 hours. Dealer replaced the #2 shift selonoid and it appears to have fixed the problem. Truck has about 34,000 miles so it was warranty. Told the dealer that if he had to drop the pan to correct the problem, put a new filter in it, even if the recommended change is 150,000, which they did. I think they also added 7 qts of new fluid if I read the paperwork right. Cheap insurance. Doubt if I will do any more to the tranny till 100k.

Nov 19, 2017 | 01:12 PM

#22

droldsmorland

Fleet Mechanic

Joined: Nov 2011

Posts: 1,825

Likes: 43

From: Land of Taxes

As a transmission guy, I recommend fluid and filter every 30-60K, 25-30K if you tow. If one waited until 150K to service an automatic you will be seeing me for a rebuild. By changing fluid and filter often you can avoid the problem of flushing. There is a procedure mentioned many times here on how to get a good 20-quart flush on a 5R110W or a 6R140 without a heated fluid exchanger, (I and others have written up this procedure, google search it cuz this search engine isn't as good).

On a new truck, I recommend you do an initial 30,000ish mile filter and fluid flush(19-20qt). Then at about 15-20K or one year I'll just drop the pan contents at an engine oil service. Then on the next trans service, I do 9qts and a filter. This schedule keeps the fluid fresh and you can get away with a filter change every other service.

100-150 bux of fluid is cheap insurance every 30-60K miles versus failure due to 150K miles of neglect at $5000 for a rebuild. Pay me now or get stranded and pay me and the tow truck later. Sorry but 150K miles is going WAY out there IMO. Anything over 60K and I consider it neglect. Just read the lil book in the glove box.

Nov 20, 2017 | 11:26 PM

#23

jetjockey99

Laughing Gas

Joined: Jan 2005

Posts: 1,142

Likes: 25

There has just been a sticky posted to the 6.0 tech forum on how to do a complete flush without a heated flush machine that you can do at home. Mark K. is on board with it as well.