Transmission Fluid Changing Scheme
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Cross-Country
Joined: Nov 2010
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Transmission Fluid Changing Scheme
I wanted to run this past the board and see what others might think. I did comunicate this with a retired transmission engineer on another site and he thought it would work but he did not help with any speciifcs.
My truck is a 2011 6.7 dually and has 21,000 miles. Just about all of those miles are at max GVWR. I only use it with the camper so I don't put a lot of miles on it. I am thinking about how I will service my transmission fluid. I know Ford reccomends a 150,000 mile change interval but I am not comfortable with that.
What I would like to do is drain the pan and refill with the same amount of new fluid and then do this on a regular basis, say 20k or 30k miles. If I did it during a engine oil change it would be very convenient. This is the recommended procedure for my Honda Accord according to two different servicing dealers. Some questions I have are:
What is the total fluid capacity of the transmission and torque converter and how much fluid comes out when you pull the plug on the transmission pan. If I new this I could make some calculations on how often I might drain the pan and refill.
My truck is a 2011 6.7 dually and has 21,000 miles. Just about all of those miles are at max GVWR. I only use it with the camper so I don't put a lot of miles on it. I am thinking about how I will service my transmission fluid. I know Ford reccomends a 150,000 mile change interval but I am not comfortable with that.
What I would like to do is drain the pan and refill with the same amount of new fluid and then do this on a regular basis, say 20k or 30k miles. If I did it during a engine oil change it would be very convenient. This is the recommended procedure for my Honda Accord according to two different servicing dealers. Some questions I have are:
What is the total fluid capacity of the transmission and torque converter and how much fluid comes out when you pull the plug on the transmission pan. If I new this I could make some calculations on how often I might drain the pan and refill.
Senior User
Joined: Oct 2008
Posts: 437
Likes: 1
From: Bucyrus, KS
You are on the right track. I usually drain the 8qts out of the pan every 15-20,000 depending on how hard I am on it. I buy the Mercon LV at O'reillys for around $4 a qt. It always comes out clean and bright red. A trans builder told me once that the most important thing is to keep the fluid clean and the temps down. I did the same thing with my '05 F250 with the 5r110. It lasted 276,000 mostly hard miles. The only reason I rebuilt it then was due to hard downshifts and I didn't want to take a chance on a month long trip. Good luck I hope this helps.
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