Vibration in transmission in highest gear

1999 FORD MUSTANG
20,000 MILES • 4.6L • 2WD • AUTOMATIC
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WES DAVIS
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  • 3 POSTS
Transmission seems okay except when it gets to probably highest gear it seems to have a vibration and you can feel that it is not smooth at all.
Dec 6, 2017 at 9:26 PM
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JACOBANDNICKOLAS
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  • 110,190 POSTS
Has the check engine light come on? Have you checked to see if there are any trouble codes stored in the computer?

https://www.youtube.com/watch?v=YV3TRZwer8k

Keep in mind, I assume you checked the transmission fluid and it is clean and full. A few things can cause what you described. An engine misfire, slipping clutch pack, bad torque converter, bad torque converter clutch.

Let me know.
Dec 7, 2017 at 6:59 PM
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WES DAVIS
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Transmission fluid does need changing. No engine lights. I am going to change filter today see what happens. is it okay to just change few quart's of transmission fluid at a time? I am also thinking that it could possibly be transmission mounts.
Dec 8, 2017 at 5:27 AM
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SATURNTECH9
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  • 30,869 POSTS
I would change all the fluid that drains out and the filter and pan gasket as well.Another thing to check is your drive line u joints if there worn out/loose that will cause a vibration.Check them for play in them.
Dec 13, 2017 at 1:29 PM
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