transmission wont shift! - Diesel Truck Forum -
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post #1 of 4 (permalink) Old 01-07-2008, 10:19 PM Thread Starter
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transmission wont shift!

hey yall ive got an 02 3500 4x4 with allison, i noticed a few nights ago that when im at full throttle and the tranny is changing from 2nd to 3rd and 3rd to 4th it sticks and i have to back off the gas for it to change,has anyone else had this problem? and know wuts it is?
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post #2 of 4 (permalink) Old 01-08-2008, 11:47 AM
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How long has it been since you changed your spin on Trans filter? You may need to put a clean one on.

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post #3 of 4 (permalink) Old 02-03-2008, 03:05 PM
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Yea check the filter, has your tranny ever been flushed, there is another filter in the pan, also check the tranny fluid i had the same problem and had a fitting leaking slowly and was just low on fluid. No fluid = no line pressure = no shift

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post #4 of 4 (permalink) Old 02-03-2008, 03:17 PM
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Are you running a programmer?
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