2005 F-250 Transmission Service - Diesel Forum - TheDieselStop.com
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6.0L Power Stroke Engine and Drivetrain Discussion of the 6.0L Power Stroke diesel engine and drivetrain in the 2003-Up Super Duties and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.0L Power Stroke engine.

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Old 10-09-2009, 03:08 PM   #1 (permalink)
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2005 F-250 Transmission Service

2005 F-250, 6.0 Lariat. Now at 60,000 miles.

In reference to transmission service,

Dealer says flush it and change in-line filter - about $ 290.00

AAmco says DO NOT flush it, but drop pan and change filter - about $ 150.00, says flushing is not recommended.

Money matters, but doing the right thing for this machine is my goal.

What do you people think?

Thanks.
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Old 10-09-2009, 03:50 PM   #2 (permalink)
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AAmco

I am not a transmission expert. But I have been around auto/truck maintenance for 40 years. I have not had a good experience with flushing, a few years ago I had company car transmission fail after tranny flushing. Maybe not related, but on my vehicles I have been dropping/cleaning pans, changing filters, CLEANING magnets, draining torque converters (when you can) and I haven't had a tranny failure since 1973 (I was 17 and very hard on trannys). I plan on servicing the tranny in my 2004 6.0 next week.........
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Old 10-09-2009, 05:10 PM   #3 (permalink)
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Torque shift tranny neeeds to be flushed with a flushing machine that heats the fluid. TS tranny has an internal thermostat that doesn't open til 164 degrees. Ford also states to flush tranny at 30,000 mile intervals. Not demeaning anyone but Aamco is one of the last sources I would listen to when it comes to the TS tranny. I don't trust them with a C6. Also, whoever flushes it must use Mercon SP fluid. If they say they have an equivelant equal, walk, no run away as fast as you can.
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Old 10-09-2009, 07:27 PM   #4 (permalink)
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Had mine flushed at 30k miles. Now at 55k. All is well. Flushing is a good thing as long as you do it at the proper intervals.
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Old 10-09-2009, 11:01 PM   #5 (permalink)
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I haven't seen any "great" advice....

Using a "flush" machine to perform a fluid exhange is going to be OK as long as no "flush chemical" is used.... It is not spec'd in the WSM... I am always fearful that enough of the active solvent will remain in the system to offer future concerns...

FWIW.... any service that includes the word "flush" should have the word "wallet" included in the mantra....

Transmission fluid service should be performed in accordance with the factory workshop manual recommendations.... if your shop doesn't have access to this information..... what can I say?
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Old 10-10-2009, 12:33 AM   #6 (permalink)
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Quote:
Originally Posted by GrampyJim View Post
I haven't seen any "great" advice....

Using a "flush" machine to perform a fluid exhange is going to be OK as long as no "flush chemical" is used.... It is not spec'd in the WSM... I am always fearful that enough of the active solvent will remain in the system to offer future concerns...

FWIW.... any service that includes the word "flush" should have the word "wallet" included in the mantra....

Transmission fluid service should be performed in accordance with the factory workshop manual recommendations.... if your shop doesn't have access to this information..... what can I say?
I have always followed this, hopefully Grampy can yea or nay it:
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Old 10-10-2009, 03:48 AM   #7 (permalink)
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fwiw, i did mine at 60k a few weeks ago, i took and oil sample, took it out got the tranny hot, drained the fluid out as much as i could. pulled the pan, cleaned the magnet, changed the screen and inline filter and re filled, i bought 10 quarts and glad i did, most say you will only use 7-8, i used all 10 and the level is perfect, my oil analysis was perfect. ill do it again in another 15k miles, thats what the lab tech at CATERPILLAR suggested (where i do my samples) and i trust him, hope this helps ya man.
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Old 10-10-2009, 10:48 AM   #8 (permalink)
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Thanks everybody!
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Old 10-10-2009, 03:13 PM   #9 (permalink)
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GrampyJim....

What does "Factory Workshop Manual" recommend for a 2006 6.0 Automatic with Torqueshift? Flush or no flush? Hard to get an answer from the Service Rep.
Thanks in advance.
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Old 10-10-2009, 04:31 PM   #10 (permalink)
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GrampyJim....

What does "Factory Workshop Manual" recommend for a 2006 6.0 Automatic with Torqueshift? Flush or no flush? Hard to get an answer from the Service Rep.
Thanks in advance.
Your owners manual states to EITHER drain the fluid and replace the external filter, OR flush w/ a heated flushing system, but to do one of these every 30k miles.
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Old 10-10-2009, 04:32 PM   #11 (permalink)
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If flushing kills a tranny, I guess I have been just coasting down hill for the last few years. Tranny was flushed at 30K, 60K, 90K and 120K. Soon it will be flushed again at 150K. Just do what the owners manual says and use the right fluids, per the owners manual, and all will be OK.

PS. If you have not maintained the tranny and it has already started to slip and die, do not expect a flush to fix it.

Roy
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Old 10-10-2009, 06:14 PM   #12 (permalink)
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Quote:
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Your owners manual states to EITHER drain the fluid and replace the external filter, OR flush w/ a heated flushing system, but to do one of these every 30k miles.
Mark, I have gone thru both of my owners manuals and they, it, says "change automatic transmission fluid and external filter element" every 30,000 miles. Pretty ambiguous to me. That is in the 2005 manuals.
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Old 10-10-2009, 08:01 PM   #13 (permalink)
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Quote:
Originally Posted by bismic View Post
Your owners manual states to EITHER drain the fluid and replace the external filter, OR flush w/ a heated flushing system, but to do one of these every 30k miles.
My owners manual simply says to "Change automatic transmission fluid and external filter element" No mention of flush. Agrees with 69cj above.
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Old 10-10-2009, 11:01 PM   #14 (permalink)
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My owners manual simply says to "Change automatic transmission fluid and external filter element" No mention of flush. Agrees with 69cj above.
The page number may vary slightly with model year, but look on (or around) page 50 of your Diesel Supplement. It states that flushing is a viable way to service your fluid changes.
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Old 10-11-2009, 01:57 PM   #15 (permalink)
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The page number may vary slightly with model year, but look on (or around) page 50 of your Diesel Supplement. It states that flushing is a viable way to service your fluid changes.
Thanks for the tip, but I just went through every page of the supplement and it does not mention flushing anywhere.
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