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99 f-350 4r100 1st gear
Posted to Transmission Forum on 5/1/2018 4 Replies

I am trying to figure out why this trans will slip in first gear, sometimes but pressure is always 120psi.

If I put it down to Manual low it works fine every time.

The pressure never drops below 120, It also does not change much when put into man 1.

I ju... Login to read more.

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