4R100 no go park to D - Ford Powerstroke Diesel Forum
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post #1 of 9 Old 06-23-2013, 10:16 AM Thread Starter
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4R100 no go park to D

Hey all,

my 4R100 is pausing after idling and going from park to drive and second. Going from part to reverse is fine.

Fluid is Mobil synthetic w/ about 1500 miles on it.
Towing 15K and the temps never exceed 170F even when it's 110F ambient.
Have 6.0 cooler with external filter, no debris in filter or tranny plug.
fluid level is fine.

Any ideas?
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post #2 of 9 Old 06-24-2013, 05:54 AM Thread Starter
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Looks like maddjack is having a similar problem. I have the TW 6 position chi as well.

I would have expected more responses from all the Ford people here, where is the expert advise?
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post #3 of 9 Old 06-24-2013, 06:20 AM
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I was getting on mine let off and got on it again in econo mode and pop , your forward clutch sounds wore out maybe.
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post #4 of 9 Old 06-24-2013, 07:45 AM Thread Starter
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I had the same initial thought.... But once it engages the tranny is flawless. Even pulling 13k lbs up 6 & 8% grades the temp never exceeds 170F. The fluid is clean as a whistle. I've pulled the external filter, cut it open and it has no particles in it to worry about. The magnetic plug is spotless.
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post #5 of 9 Old 06-24-2013, 07:46 AM Thread Starter
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I'm thinking it's the solenoid pack?

Any other thoughts?
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post #6 of 9 Old 06-24-2013, 12:29 PM
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You must read the codes to have any hope of getting it fixed or getting help..

Also filling your sig will help others to know just what you have.
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post #7 of 9 Old 06-25-2013, 05:26 AM Thread Starter
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Thank you Cary,

There are no codes, that's part of the puzzle.

My truck is a 2001 F350, 7.3L w/ 4R100. Crew cab, dually, 4x4 long bed. 107K miles.
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post #8 of 9 Old 06-25-2013, 10:11 AM
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What did you use to pull the codes...auto part stores readers won't pull trans codes you need a real scanner.
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post #9 of 9 Old 06-26-2013, 10:59 AM Thread Starter
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I have a Superchips tuner that I use to read DTC's. I also have a U380 Ford ODB2 scan tool to back up any codes that may be read or miss read. There were no codes.

After several hours every day, I have found the the most common cause of the tranny issues I am have are cause by main shaft bearing failure. My current failure isn't enough to register a code due to low pressure.... yet. By the time the failure or low pressure situation is bad enough to register a code, the truck would no go, in any gear.

Solution... Rebuild tranny.

Not worth partial fixes. I've never been towed and (nock on wood) never will.

Thanks for all the insight.
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