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Getting ready to change the Transmission Fluid

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Old May 23, 2026 | 04:28 PM
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Default Getting ready to change the Transmission Fluid

Purchased a pan with a drain plug and a dip stick that can be accessed from the Engine Bay. I've got a 2010 F150 Lariat with the 5.4 liter engine. Great trucks, runs like a champ. Looking for tips. I got an aftermarket pan gasket, which is not like the OEM metal that is on the pan now. Does anyone recommend using some additional gasket seal with this type of gasket?

Thanks in Advance.
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Old May 23, 2026 | 09:03 PM
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I would stick with the oem gasket!
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Old May 24, 2026 | 08:52 AM
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what is the brand / part number of the aftermarket pan gasket?
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Old May 24, 2026 | 09:33 AM
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you have the 6r80 trans, correct ?

I replaced my pan ( with drain plug pan), and still used stock OEM gasket, no need to change, it is reusable.

what brand pan did you get, I used the Dorman pan which has had some quality issues, and maybe still does. The first pan I received had these issues and I got a replacement, was not a problem for me because I was on the look out even before I started the change,

if you got the doorman pan I can post pictures and elaborate.
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Old May 25, 2026 | 04:20 AM
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My .02 is return the pan etc, keep your hard earned money, and keep it stock. You will want to pull the pan anyways to replace the filter. I suppose if you plan drain and refills on your tranny every 10K or something could be worth it. I just dont think that is necessary. Drop the pan, fresh fluid and filter every 40K.
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Old May 25, 2026 | 09:22 AM
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I personally like a pan w/plug. Our ‘02 Chevy Tahoe came stock with a OEM pan w/plug, very easy, very smart.

not only does it give you the option of doing fluid changes more frequently than you would do otherwise, cause only a partial amount of fluid drains during either type of service. It also makes dropping the pan much easier and cleaner, by draining the fluid first.

everyone has their own opinions, likes and dislikes. I’ve even heard some ice cream shops have 31 flavors, go figure that.
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Old May 25, 2026 | 10:47 AM
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the hardest part of this project is getting the level correct. Need to check with it hot and while running . The litle dipstick is next to hot exhaust pipe and it wil cause severe burns to the hand it is tight in there. On recommendation from the forum here, I bought some special extra long CURVED needle nose pliers just for checking the level. ( you might want to confirm OEM level before calibrating to the aftermarket stick )

You might want to consider replacing the failure prone trans cooler lines while you are at it . https://www.f150forum.com/f38/bullet...r-line-524747/

Last edited by Dustodustrider; May 25, 2026 at 11:18 AM.
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Old May 25, 2026 | 10:48 AM
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Originally Posted by jhanna
I personally like a pan w/plug. Our ‘02 Chevy Tahoe came stock with a OEM pan w/plug, very easy, very smart.

not only does it give you the option of doing fluid changes more frequently than you would do otherwise, cause only a partial amount of fluid drains during either type of service. It also makes dropping the pan much easier and cleaner, by draining the fluid first.

everyone has their own opinions, likes and dislikes. I’ve even heard some ice cream shops have 31 flavors, go figure that.

And I always just get vanilla anyways… so there ya go, Ha! Perhaps, if I tried a new flavor, I’d like it 🤷‍♂️
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Old May 25, 2026 | 10:54 AM
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when I chnaged my cooler lines , some of the hoses had minor oil weeping under the aluminum crimps, when I cut the crimps off, the weeping hoses were so hard and shrunken they just fell off the barbs.
prices of SAE J1532 or equivelant trans cooler line ranged wildly from $45 a foot to $5 a foot , got some gates a oreallys for $10 foot . I didnt worry too much about clamping as the OEM uses spring clamps https://www.f150forum.com/f38/bullet...r-line-524747/

Last edited by Dustodustrider; May 25, 2026 at 10:57 AM.
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