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Discussion Starter · #1 ·
I have a 99 ford expedition 5.4L with 140k miles, recently I noticed that when I accelerate the car the RPMs will go up but the car won't pick up any speed, I noticed this and I put on a new air filter, cleaned the MAF sensor and the throttle body, went for a test drive and it keeps doing the same, there is no check engine light, there's no missed fires or anything weird, thanks for reading any info is much appreciated
 

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Phoenix, AZ 85008
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Sounds like the transmission is slipping.
Check and smell the tranmission fluid.
Post back with the results

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