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Repair guides and support for the seventh generation of Ford F-Series trucks. Models include the F100 (discontinued in 1983), F150, F250, F350, and others.

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My c5 trans lost all power to my 1 and 2 gear is in 2wd and 4wd

My 83 model f150, 4wd model wont move forward in first and second, my reverse and 3 and 4th along with over drive still work, but in first and second, it will try for a second, and then give up, lossing all power, and the engine is brand new and the fluid and filter was just changed. Ive tried it in 4w high and low, along with 2w high. Can anyone help explain what happened.

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Low fluid pressure is the problem. The most likely cause is low fluid level. Check the fluid level. If the level is good, then it will have to be diagnosed. Something may be clogging a passage in the valve body. This could have occurred during the filter change.

The C5 is a three speed, the AOD is the four speed and OD is the fourth speed.

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