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My automatic trans. is just starting to slip in 3rd and 4th gear. (I think it is an "A518" 4 speed with O.D.) There are 150k miles on the drive train. I put on 50k easy miles in the last ten years. The trans. oil is clean. D1, D2, and R still work good. Could there be a linkage adjustment or a band adjustment I could do before taking it to a shop? I can do alot of my own work, but don't have too much experience with automatic trans. Thank you.

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Hi, there are three sensors in the transmission that control it with the computer. One sensor controls 1st and 2nd gear with the shift. The second sensor controls 3rd and 4th gear and the shift. The third sensor controls OD and TORQUE CONVERTER LOCK.
It now means you are having a problem with the sensor that controls the 3rd and 4th gear which you need to change but you require the service of a automatic transmission expert to replace the sensor because the sensor is located inside the transmission....

Posted on Nov 07, 2010

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