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overdrive shifts in and out all the time???

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Old Aug 4, 2009 | 11:05 PM
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shaunbolton
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overdrive shifts in and out all the time???
I'm not sue where to start. while driving It will go into OD but then shift right back out again. Then in again, then out. It keeps doing this.
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Old Aug 4, 2009 | 11:33 PM
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oldblues
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From: s .e. pa.
hi
what truck / engine / ?

need some details , prob your tps .
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Old Aug 5, 2009 | 05:53 AM
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shaunbolton
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1991 w250 12v
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Old Aug 5, 2009 | 07:58 AM
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John Faughn
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From: St Paul , MN.
Also , I have seen mal adjusted / bad break switches do that , you can take your foot and put light pressure under the break peddle , lifting it slightly , if it stays in Lock Up , that's your problem .
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Old Aug 5, 2009 | 05:10 PM
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wannadiesel
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From: New Holland, PA
Yep, TPS. Take a look in the sticky at the top of the 1st gen board for info on adjusting the TPS (try that first, it's free) as well as a few low-buck alternatives to a $200 TPS.
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