4R100 System Upgrades/Fluid Flush - Comments?
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4th Gear
Joined: Mar 2023
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From: Meridian, Idaho
4R100 System Upgrades/Fluid Flush - Comments?
So, I have read the bazillion posts/threads on this subject, but wanted comments on my specific case…so here it goes…
I am going to be installing the John Wood Valve Body, Mishimoto 37-row Tranny Cooler and the Bypass Delete (don’t really want to get into the merit or lack thereof on this) on my E99 7.3L 4R100.
Obviously, I am going to be draining/dropping the tranny pan and removing/replacing the accumulator VB. I am also planning on draining the torque converter (I am assuming I can since it is an E99…haven’t checked for the drain plug yet). Since I am going to be installing the Bypass Delete, I plan on applying low-pressure air (~15lb?) to blow out the tranny cooler lines and cooler prior to pulling the cooler to minimize the fluid mess.
So, after all this is done, how much old fluid will be left in the tranny? Is there enough that it would warrant a whole refill/flush (per the Mark Kovalsky method)? Or would a quart or two of old oil not impact the total system of 18+ quarts?
Looking forward to your experience/suggestions. (@MarkKovalsky…feel free to chime in 😊
Thanks everyone!
I am going to be installing the John Wood Valve Body, Mishimoto 37-row Tranny Cooler and the Bypass Delete (don’t really want to get into the merit or lack thereof on this) on my E99 7.3L 4R100.
Obviously, I am going to be draining/dropping the tranny pan and removing/replacing the accumulator VB. I am also planning on draining the torque converter (I am assuming I can since it is an E99…haven’t checked for the drain plug yet). Since I am going to be installing the Bypass Delete, I plan on applying low-pressure air (~15lb?) to blow out the tranny cooler lines and cooler prior to pulling the cooler to minimize the fluid mess.
So, after all this is done, how much old fluid will be left in the tranny? Is there enough that it would warrant a whole refill/flush (per the Mark Kovalsky method)? Or would a quart or two of old oil not impact the total system of 18+ quarts?
Looking forward to your experience/suggestions. (@MarkKovalsky…feel free to chime in 😊
Thanks everyone!
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4th Gear
Joined: Mar 2023
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From: Meridian, Idaho
Given that, how would you modify your flush procedure so I will waste the least amount of new fluid? Thanks.
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4th Gear
Joined: Mar 2023
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From: Meridian, Idaho
Thread Starter
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4th Gear
Joined: Mar 2023
Posts: 4
Likes: 0
From: Meridian, Idaho
In the flush procedure, you noted a 30 second run of the truck after the first fill of six quarts of new fluid to fill the torque converter (TC) (I'll probably do seven). Is that enough time to push seven quarts of fluid into the TC? (That is what I drained from the TC). I read in another thread 'testing' the flow from the rear cooler line should result in 1 quart in 15 seconds. Is the TC filled faster because the fluid doesn't have to get pushed through the cooling system? I want to make sure I am not overfilling the transmission before the second run.
Also, since you noted there would be 5-6 quarts of old fluid left in the transmission, is the goal (in my case) to get that much out by the end the flush?
Thanks again.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,741
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From: SE Florida
With an empty converter it will take longer than 30 seconds.
The fluid will not flow faster since it is still pushed through the cooling system.
You will probably get 6-8 quarts out by the end of the flush.
The fluid will not flow faster since it is still pushed through the cooling system.
You will probably get 6-8 quarts out by the end of the flush.
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