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  1. F

    Allison 5sp: wont downshift over 55

    got lucky got under dash and found blue wire out of tps connector that was broken. spliced back together and everything works like a champ. got myself an early christmas present:)
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    Allison 5sp: wont downshift over 55

    have a 2001 duramax with allison tranny. won't downshift over 55. have been to cottmen xmission, they said no codes were set nor were there any in history and they say they have no clue. just picked it up and did another road test. about 15 miles. downshifted at 60 and 65 four times, then...
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    dtc p0236b

    have a 2001 lb7 which is throwing a p0236b according to a tech 2. cant find a p0236b. any help appreciated. Mitchel on demand leads me to think the boost sensor (p373269) might need to be replaced.
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    dtc p0236b

    have a banks on it but the connectors r totally unplugged so guess i should say say none. only other aftermarket is a banks exhaust brake
  5. F

    dtc p0236b

    have a 2001 lb7 which is throwing a p0236b according to a tech 2. cant find a p0236b. any help appreciated. Mitchel on demand leads me to think the boost sensor (p373269) might need to be replaced.