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2017 6.7 f550 Transmission skipping underload/Problems

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Old May 29, 2023 | 08:13 PM
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2017 6.7 f550 Transmission skipping underload/Problems

Good Evening Gents,
So I have a 2017 6.7 F550 Mason Dump with 71k miles.... bought used.
Truck is deleted and tuned and 4x4
Started shifting and grinding between 4-5th and also under heavy acceleration.... Truck is well taken care of...
Checked Trans fluid and was low about 2 Quarts.... Added fluid and I'm going to run it tomorrow and see if anything changes
If the issues continues, what would be my next steps.. Anybody run into this issues before.... Think it will need a new Tranny?
I own a Masonry business, so I am no mechanic by any means... but just trying to educate myself and gain any knowledge....

Thanks for your time or any advice you can give.

Also Happy Memorial Day to all my brothers and sisters who have served

Thanks Jack
 
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Old May 29, 2023 | 08:43 PM
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see how it runs, recheck hot and level.

Next step would be to see if there are any tranny codes.
 
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Old May 30, 2023 | 06:11 AM
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And whatever you do don't ask for tranny fluid at the auto parts store or you will get a case of Bud Light.
 
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