tranny shift problems AT545 - Ford Powerstroke Diesel Forum
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Old 04-21-2013, 10:28 AM
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tranny shift problems AT545

Hi i have 2000 international 4700 with t444e 7.3l diesel with at545 transmission i had the tranny replaced 1.5 years ago and i had a problem with it when it shifts from 2nd to 3rd gear only it revs up to 2000rpm and it starts to chug and clackle for a few seconds then it shifts into 3rd. this occurs every time but only when shifting from 2nd to 3rd. i have a 2 year warranty on this tranny from a authorized allison automatic shop. I had brought it back to them and they pulled the tranny out and replaced some parts and dyno tested it and they said it was good i picked it up and within the first day of driving it did the same thing. i have 6 months until warranty is up. Could this be a sensor problem or something inside the tranny? any comments or suggestions would be great.


Thanks
Gio
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Old 06-04-2013, 07:42 PM
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I had a similar issue with my 2002,had trans done and win I got it back with my programmer on any of the high output settings it would shift way late from 2nd to 3rd and would make same crackle noise,took it back and they tested everything and nothing ,got it back and same thing, at this point im starting to get a little pissed, just spent $3000 on a beefed up rebuild, anyways to make a long story short it was in and out of trans shop 3 times and no fix. Finally after research I decided to try the john woods valve body, and holy ****, it was what the doctor ordered thing shifted great, lowered my shift points in 2nd to 3rd by like 500rpms ,and was perfect.
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Old 06-04-2013, 08:52 PM
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Quote:
Originally Posted by smoke on this View Post
I had a similar issue with my 2002,had trans done and win I got it back with my programmer on any of the high output settings it would shift way late from 2nd to 3rd and would make same crackle noise,took it back and they tested everything and nothing ,got it back and same thing, at this point im starting to get a little pissed, just spent $3000 on a beefed up rebuild, anyways to make a long story short it was in and out of trans shop 3 times and no fix. Finally after research I decided to try the john woods valve body, and holy ****, it was what the doctor ordered thing shifted great, lowered my shift points in 2nd to 3rd by like 500rpms ,and was perfect.



Thanks for your help I brought it back to the tranny shop and they finally figured it out they replaced the spring in the valve body in between 2nd and 3rd and now it shifts great.

Thanks
Gio
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