4r100

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May 7, 2009 | 07:26 PM

ford7.3l250

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4r100

well i have a 01 f250 with the 7.3l diesel and the other day i pulled out of the gas station and got about 150 feet and noticed it didnt shift out of 2nd got to a stop area and checked the fluid it wasn't reading vary well. so went to back up to head back to the gas station and get fluid and reverse was poping in and out then got to the gas staion and put 1 qrt in. now it dosnt seem to be shifting at the right rpm and when going for 3rd to 4th it dont happen till about 45 50 and about 2500 and then it gose straight into OD the level is were its supposed to be and everything. i dont know a hole lot about trannys.

May 7, 2009 | 07:29 PM

dew the thunder

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Joined: Feb 2007

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From: South Bend, IN

3-4 at 45-50 sounds about right. That's where it should be shifting. And straight into OD from 4? Its only a 4 speed tranny so 4 is OD.

May 7, 2009 | 08:52 PM

F350-6

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Joined: Mar 2007

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From: Texas

Welcome to FTE. How many miles do you have on the tranny? Has it ever been rebuilt? When was the last time you changed the fluid in it? Did the fluid look funny or smell burnt?

May 7, 2009 | 11:22 PM

Stewart_H

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Joined: May 2004

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From: Central Coast of CA

Quote:

Originally Posted by F350-6

Welcome to FTE. How many miles do you have on the tranny? Has it ever been rebuilt? When was the last time you changed the fluid in it? Did the fluid look funny or smell burnt?

I'm thinking you're thinking what I'm thinking....mechanical diode, yes?

To the OP, the way your tranny is acting resembles some of the same symptoms some have experienced when the mechanical diode in the '01 4R100's bites the bullet.

Some have had their trucks just quit, while others have had shifting problems similar to yours.

Stewart