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^^^^I also used Mark K's method and it works great. Prior to that I used to take my truck to the dealer for their "trans fluid flush". I later found out that all they did was drop the pan and drain the convertor and refill with new fluid so only half of the oil was getting changed out. Mark's method is more like a full fluid transfusion and it's remarkably easy to do. If you follow his method exactly, then you will pump out about 6 qts before you have to fill up the pan again. In my opinion this is ideal because then you have a pan full of clean fluid and it will only take 3 cycles before you have flushed the entire system (about 18 qts including cooler). I buy 20 qts of Mercon V when I change my fluid because I usually need to add a little at the very end of the procedure.
I am getting ready to change the trans fluid on my 3 trucks this weekend if I can round up enough trans fluid. I am going to try and find Mobil 1 syn in 5 gallon buckets since I think that might be a little less expensive than 60 qts of Motorcraft Mercon V.
Changing mine on Thursday. I also have an issue with locating enough Mobil 1 to do the job. Many of the local auto parts places only carry a few quarts at a time. Luckily, I went into an AutoZone and they just put out 30 quarts so I bought them all as I need 26 quarts for a change.
02 F250 4X4 7.3, PC 6 ˝ lift, Centerline wheels, PC 37x12.50R-17's, Warn PP HD Winch, Jotto Console, Scanner, Icom HAM radio, 91 Gal. Aux fuel cell, Diamondback HD bed cover, Warn Hubs, dual steering stab, Step2 Bed steps, Warn FF, AIS, 4" t/b exhaust with Aero turbine muffler, backup buddy lights, Mag-Hytec diff cover & tranny pan, SGII, 6.0 T Cooler, ELF7405 with oil By-Pass, IH bellowed ups, Gen 2 FRx, HPx, CCV Mod, CAT ELC, ez down t-gate, Fumoto drain, Rev/Cargo LEDs, 4 pillar gauge with ISSPRO, DP Tuner
When I did mine a couple months back I drained the pan changed the filter then rolled the motor over till the torque converter plug was accessible after removing the cover plate. Drained the converter and then filled the trans back up.
Nearly any idiot can do this.
2000 Super Crew 8 ft bed. Super Duty 7.3L PSD
Hutch and Harpoon in tank mods, 6637, 4" MBRP, Bilstiens Riff Raff intercooler boots. Porterfield R4-S brake pads. Big towing mirrors, AIRLIFT 5000 lb rear air springs.
285K miles and counting.
I dony know about how much more Mark s flush gets out versus dropping the pan and draining the tc, I did an 02 for my boss and it took 18 quarts total.
Dropping the pan won't get that much out. They stopped putting the drain plug in the torque converter so only getting out a few quarts from the pan won't help much on many trucks.
Mark's version also flushes the lines, cooler and valve bodies. Simply draining won't do that. If you're lucky enough to have a plug in the torque converter, you can still use Mark's flush procedure. You're just ahead of the game since you don't have as much old fluid to flush out.
I didnt realize they quit putting plugs in the tc. When did they start that? I worked on a ranch for three years that had 7 psds, two had autos, and the 95 & the 02 both had plugs in the tc. I did all the maintences on the trucks, and when I left the 02 still had the orginal tranny with 300k on the clock, the other auto, 95, had orginal tranny but a new tc at 250 k.
1999 F250 7.3 ZF6 4x4 3.73's 200k miles
1997 F250 7.3 ZF5 2wd 4.10 430K miles Dr. Ron Paul 2012!!
I do it the same every time... I take it to the Cheveron Lube place. I get out and go into the office and watch through the window drinking steaming hot coffee. They hook up the truck to the Trans fluid transfer machine.. It uses the Trans pump to transfer the fluid. You see the new stuff going in and the old stuff coming out... In about 30 minutes I pay them $99.99 and I drive out... They do not drop the pan and I prefer it that way.
1999 F250 SD 7.3, Auto, 2WD, S/B Cold Air Intake, Pillar Gauges, 6.0 Trans Cooler. 2003 Headlight Upgrade, Air Lift Air Bag Suspension, DP Tuner, Pioneer avh-p3400BH touch screen stereo receiver
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